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Thunder Scientific 3920 Operation And Maintenance Manual

Low humidity generation system
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Model 3920 System Manual
Thunder Scientific Corporation

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Summary of Contents for Thunder Scientific 3920

  • Page 1 Model 3920 System Manual Thunder Scientific Corporation...
  • Page 2 Model 3920 Low Humidity Generation System Document #OM3920 - Edition 2.1 OPERATION AND MAINTENANCE MANUAL...
  • Page 3 Model 3920 Low Humidity Generation System...
  • Page 4 Thunder Scientific Corporation 3920 Item Check List 1. Certificate of Calibration (On System) 2. 3920 Low Humidity Generation System Manual 3. HumiCalc® with Uncertainty Software Download 4. T10 Torx Driver 5. 1/4" WVCR x 1/4" Tube Fittings 6. 1/4" WVCR x 1/8" Tube Fitting 7.

  • Page 5: Important Notice

    FREE. https://www.thunderscientific.com/product_registration Once you have registered your Model 3920 Low Humidity Generator, click the link on the same page, labeled Click here if you need to download your FREE software. Click here if you need to download your FREE software.
  • Page 6 Suomi English Tämä tuote noudattaa WEEE-direktiivin (2002/96/EY) This product complies with the WEEE Directive (2002/96/EC) marking merkintävaatimuksia. Kiinnitetty etiketti osoittaa, että tätä requirements. The affixed label indicates that you must not discard sähkö-/elektroniikkalaitetta ei saa hävittää kotitalousjätteissä. this electrical/electronic product in domestic household waste. Tuoteluokka: Viitaten WEEE-direktiivin liitteessä...
  • Page 7 Deutsch Nederlands Dieses Produkt stimmt mit den Kennzeichnungsanforderungen Dit product voldoet aan de merktekenvereisten van de AEEA- der WEEE-Richtlinie (2002/96/EC) überein. Das angebrachte richtlijn (2002/96/EG). Het aangebrachte merkteken duidt erop dat Etikett weist darauf hin, dass dieses elektrische/elektronische dit elektrische/elektronische product niet met het huishoudelijk Produkt nicht in Hausmüll entsorgt werden darf.

  • Page 8: Table Of Contents

    Expansion Valve (T ) ......................... 30 Test Temperature (T ) ......................... 30 Saturation Pressure (P ) ........................30 Test Pressure (P ) ..........................31 Humidity Formulas ..........................31 Model 3920 System Manual – Document #OM3920 - Edition 2.1 May 2025...
  • Page 9 Test Temperature ....................... 111 Pressure Transducer Calibration ....................... 112 6.2.1 Equipment Required ......................112 6.2.2 Calibration Procedure ......................112 6.2.3 Test Pressure ........................129 6.2.4 Supply Pressure ........................129 Model 3920 System Manual – Document #OM3920 - Edition 2.1 May 2025...
  • Page 10 10.3 Manual Connection .......................... 276 10.3.1 Manual Connection Example ..................... 280 10.4 Opening a Device Connection ......................289 11 Data Backup 12 System 12.1 Control System ..........................291 12.1.1 Control Computer....................... 291 Model 3920 System Manual – Document #OM3920 - Edition 2.1 May 2025...
  • Page 11 13.4.30 Flow Valve at Maximum Limit - Possible ice build up ............. 307 13.4.31 Expansion Valve Reported Error: ..................307 13.4.32 Expansion Valve Failed to Find Home Position ..............307 Model 3920 System Manual – Document #OM3920 - Edition 2.1 May 2025...
  • Page 12 14.18 19S3920918-1 – Pneumatic System (Generate Mode) ..............328 14.19 19S3920918-2 – Pneumatic Systems (Purge Mode) ................ 329 14.20 19S3920918-3 – Pneumatic System ....................330 14.21 19D3920920 –Methanol Fill Level ....................331 Model 3920 System Manual – Document #OM3920 - Edition 2.1 May 2025...

  • Page 13: Getting Started

    ETTING TARTED This section will provide the user with information about the Model 3920 low humidity generator, where to obtain technical support, software license agreement, specifications, uncertainty, facility requirements and installation. The following sections will provide further details on how to use and operate the Model 3920 generator using the ControLog®...

  • Page 14: Notice

    2.3.4 Methanol The temperature conditioning of the 3920's saturator employs a fluid circulation system in conjunction with a cascade refrigeration system. Methyl alcohol (methanol) is used as the heat transfer fluid because of its low viscosity at the minimum saturator temperature of -80 °C. Extreme caution is required due to the flammability and poisonous nature of methanol.

  • Page 15: Personal Protective Equipment

    Table 1-1 2.4 T ECHNICAL UPPORT If the user requires assistance with any aspect of the 3920 Humidity Generating System or the ControLog application, technical support can be obtained by contacting Thunder Scientific Corporation by any of the following means: Web: www.ThunderScientific.com...
  • Page 16 Should you have any questions concerning this Agreement, or if you desire to contact TSC for any reason, please write: Thunder Scientific Corporation, 623 Wyoming NE, Albuquerque, NM 87123 Model 3920 System Manual – Document #OM3920 - Edition 2.1 May 2025...

  • Page 17: Warranty

    2.6 W ARRANTY Thunder Scientific Corporation (TSC) warrants, to the Buyer, the Product manufactured by TSC to be free of defects in material and workmanship under normal use and service and to be free from inadequate mechanical design when operated within the specified design limitations for a period of one year from date of acceptance.

  • Page 18: Specifications

    Temperature Control Stability is defined as the standard deviation over a 10-minute period, as measured by the saturation temperature control sensor after being at point for 60 minutes. Model 3920 System Manual – Document #OM3920 - Edition 2.1 May 2025...

  • Page 19: Uncertainty

    Test pressure at 1 atmosphere Uncertainty values represent an expanded uncertainty using a coverage factor, k=2, at an approximate level of confidence of 95%. Uncertainty is based on the specifications from the 3920 uncertainty analysis Includes saturation temperature and test temperature.

  • Page 20: Pure Water Supply

    (icing) at the saturator inlet and outlet. If the measured ambient pressure frost point of the gas supply is wetter, for example -70°C, then the user must enter this value into the system for the 3920 to operate optimally. Refer to section 2.13.7 Supply Gas Frost Point...

  • Page 21: Positioning

    2.12.3 Heat Transfer Fluid Temperature conditioning of the Model 3920 utilizes methanol as a heat transfer fluid. This fluid is circulated by a magnetically coupled centrifugal pump through the refrigeration and heating system and the fluid shell surrounding the saturator.

  • Page 22: Setting Internal Supply Pressure Regulator

    3920 regulator. Adjust the 3920’s internal pressure regulator (REG) to 10 psiG below the input gas supply pressure, but never above 250 psiG. For example, if the input supply pressure indicates 255 psiG, then adjust the internal pressure regulator to 245 psiG.

  • Page 23: Quick Start

    After the system boots the generator will show a loading screen which will indicate the status of the loading process and will also show the software version of the generator. Model 3920 System Manual – Document #OM3920 - Edition 2.1 May 2025...

  • Page 24: Controlog Screen

    Upon completion of the loading process the generator will show the main ControLog page and a dialog showing the status of establishing communication with the generator. Once communication with the generator is established the generator’s parameter and data tabs will be displayed. Model 3920 System Manual – Document #OM3920 - Edition 2.1 May 2025...

  • Page 25: Control Parameters

    The Parameter Tab Group is located on the left side of the application and contains a parameter tab for each connected device. The 3920 Parameters contain all the control and measurement parameters critical to the operation of the humidity generator.
  • Page 26 Enter the new value into the Setpoint Entry box and select Ok. Notice that the Frost Point humidity setpoint value updates to the new value and the actual values begin moving toward the new setpoint. Model 3920 System Manual – Document #OM3920 - Edition 2.1 May 2025...

  • Page 27: Control Modes

    Note – The Actual Value for a humidity Value Tile is not shown when purging. 2.13.5 Control Modes The user can change the operating mode of the 3920 by selecting from the drop-down menu within the Mode group on the Generator’s Operation menu tab.

  • Page 28: Purging, Generating And Shutting Down

    2.13.6.1 Purge Mode Selecting Purge from the run menu commands the 3920 into purge mode. The purge mode is generally used to prevent icing within the saturator and dry the saturator outlet after movement (transportation), storage (power off, no gas flow, etc.), after performing the saturator fill procedure, or while transitioning the saturator from higher to lower temperatures.
  • Page 29 When stopped, all system functions shut down, pressure is vented, and the idle Control/Display screen is shown. During this idle time when the 3920 is stopped, gas is not flowing through the saturator. After extended periods of this idle time, the 3920 must be purged again prior to further use.

  • Page 30: Supply Gas Frost Point

    “Supply Gas Frost Point” system parameter. To do this, select the Utilities tab from the Generator group and press System Parameters. Under the User tab select the USER[6] system parameter. Model 3920 System Manual – Document #OM3920 - Edition 2.1 May 2025...
  • Page 31 In the edit box enter the dryness of the supply gas. In this example we will use -70 °C, so enter -70 and press the Update button. Press Next. Model 3920 System Manual – Document #OM3920 - Edition 2.1 May 2025...
  • Page 32 Select yes to updated system parameters and press Next. A report of the current system parameters will be displayed, and the user has the option to save the file. Press Finish to close the dialog. Model 3920 System Manual – Document #OM3920 - Edition 2.1 May 2025...

  • Page 33: Power-Off

    The user is safe to switch the power switch to OFF once the PC has shut down completely (display goes blank). CAUTION! TURNING OFF POWER WITHOUT SHUTTING DOWN THE SYSTEM FIRST CAN CORRUPT THE EMBEDDED OPERATING SYSTEM. Model 3920 System Manual – Document #OM3920 - Edition 2.1 May 2025...

  • Page 34: Set Date And Time

    Start by long pressing or right clicking anywhere within the status bar. A long press is when you touch and hold the screen. Long enough for a square selection box to appear. Releasing will open the status bar context menu. Model 3920 System Manual – Document #OM3920 - Edition 2.1 May 2025...

  • Page 35: Help

    Select “Set Date and Time” from the context menu to open the system Date and Time dialog. 2.13.10 Help The Help Menu located on the upper right side of the screen, allows the user to open the 3920 System Manual.

  • Page 36: Fitting Instructions

    Fitting Instructions The Model 3920 low humidity generation system uses a Swagelok VCR® type fitting on the conditioned gas outlet. Please follow the Swagelok® instructions when connecting devices to the 3920 outlet. Refer to drawings: 19D3920901-2 Model 3920 System Manual – Document #OM3920 - Edition 2.1...

  • Page 37: Principle Of Operation

    RINCIPLE OF PERATION The Model 3920 low humidity generation system is based on the two-pressure principle. This process involves saturating gaseous nitrogen, with water vapor at a given temperature and pressure. The saturated high-pressure gas flows through an expansion valve where it is isothermally reduced to test pressure. The indications of saturation temperature, saturation pressure, test temperature, and test pressure are then used in the determination of all hygrometric parameters such as Frost Point, Dew Point, PPM, %RH, etc.

  • Page 38: Test Pressure (P )

    3920 is not a requirement for successful operation of the generator. Refer to the HumiCalc with Uncertainty Reference Manual for a full description of the equations used by the 3920 to generate a known humidity and corresponding uncertainty value.

  • Page 39: Controlog Interface

    Data and Graph Tab Group, Information Tab Group and the Status Bar. Each feature is designed to be intuitive to use and to provide the user with detailed information on the operation of the generator and/or connected device(s). Model 3920 System Manual – Document #OM3920 - Edition 2.1 May 2025...

  • Page 40: Menu Bar

    It also allows the user to save all open data or graphs, clear the status log, save the status log, restore the tab layout, about the application and shutdown system. Model 3920 System Manual – Document #OM3920 - Edition 2.1 May 2025...
  • Page 41 This can be very useful if you have a device configuration that is often used or a commonly used profile as it removes the process of navigating and selecting the file each time. Model 3920 System Manual – Document #OM3920 - Edition 2.1 May 2025...
  • Page 42 Excel 97-2003 Workbook (*.xls) • Example: If the user had two data tabs open, one called “3920 Data” and the other called “Agilent 34970A Data” and the user wanted to save the files as Excel Workbooks using the name “Test Data 10Dec15”.
  • Page 43 4.1.1.4 File Explorer Opens a Windows file explore to allow the user to manage files. This can be used to easily copy data and report files from the 3920 to an extern USB drive. 4.1.1.5 Clear Unpinned Items Clears all unpinned items in the list of recent files.

  • Page 44: Home Menu Tab

    New Graph Wizard dialog that will step the user through the selection process of what data the user would like to include in the new graph. This operation is always available. Model 3920 System Manual – Document #OM3920 - Edition 2.1 May 2025...
  • Page 45 For more information, refer to section 8 Data and Data Summary Model 3920 System Manual – Document #OM3920 - Edition 2.1 May 2025...
  • Page 46 REASON, SOME CONSIDERATION SHOULD BE GIVEN TO THE AMOUNT OF DATA DESIRED, THE OVERALL TIME SPAN OF THE DATA (I.E. HOURS, POSSIBLY DAYS), AND ULTIMATELY THE DATA INTERVAL. Model 3920 System Manual – Document #OM3920 - Edition 2.1 May 2025...
  • Page 47 Note Data is only recorded while the 3920 is in purge or generate mode. 4.1.2.5 New Device The New Device connection command allows the user to create a new device connection. Selecting this command will open a Connection Wizard dialog that will step the user through the process of creating a new connection to a device.

  • Page 48: Units Menu Tab

    4.1.3.1.2 Pressure Unit The Pressure Unit allows the user to change the displayed units for pressure. Available pressure units: • • • • • • • millibar • Model 3920 System Manual – Document #OM3920 - Edition 2.1 May 2025...
  • Page 49 Available density units: • • g/m^3 lb/ft^3 • 4.1.3.1.5 Enthalpy Unit The Enthalpy Unit allows the user to change the displayed units for enthalpy. Available enthalpy units: • btu/lb • Model 3920 System Manual – Document #OM3920 - Edition 2.1 May 2025...

  • Page 50: Operation Menu Tab

    4.1.4.1 Mode The Mode Menu allows the user to change the operating mode of the 3920. It allows the user to select between %RH, Frost Point, Dew Point, PPMv, PPMw, and Saturation Pressure. 4.1.4.1.1...
  • Page 51 4.1.4.2 Run Menu The Run Menu allows the user to run the 3920 manually in generate or purge mode. The Run menu also allows the user to manually shutdown the 3920. The user can select to Purge, Generate or Shutdown. The general rule of thumb is to always use purge mode when going down in temperature.
  • Page 52 Selecting Shutdown from the run menu commands the 3920 to shutdown. The 3920 may be shutdown while generating. When stopped, all system functions shutdown, pressure is vented, and the idle Control/Display screen is shown. During this idle time, when the 3920 is stopped, gas is not flowing through the saturator.

  • Page 53: Hour Meter

    The Hour Meter allows the user to see the number of operational hours the generator has on it. The hour meter indicates the number of hours the generator has been operated in the generate mode. Model 3920 System Manual – Document #OM3920 - Edition 2.1 May 2025...

  • Page 54: Profile Menu Tab

    The Profile Menu Tab allows the user to manage Auto Profiles. Auto Profiles give the user the ability to program a set of humidity and temperature test points and dwell times that will automate the 3920 generation process. The profile menu is dynamic and has operations that are specific to the profile tab.

  • Page 55: Utilities Menu Tab

    4.1.7.1 Water Capacity The Water Capacity indicates the current water capacity of the 3920 and when pressed, opens up the 3920 Water Capacity and Clear-Cycles interaction dialog that allows the user to view the state of the water capacity and perform clear-cycles.
  • Page 56 1) Set the Flow setpoint to 0 liters/minute. Allow a few seconds for the flow and saturation pressure indications to drop off. Temperature control will remain active. 2) Disconnect and remove the depleted gas source. 3) Connect to the new gas source. Model 3920 System Manual – Document #OM3920 - Edition 2.1 May 2025...
  • Page 57 4) Set the Flow setpoint back to the original setting. Within a few minutes, the system will return to its previous state. 4.1.7.3 Generator Calibration The Generator Calibration command opens the Calibration Wizard dialog for calibration of the Model 3920 Low Humidity generator’s temperature probes, pressure transducers and mass flow meter. For more information, refer to section 6 Calibration 4.1.7.4...
  • Page 58 The Import Uncertainty Solution file command allows a manager to import a HumiCalc with Uncertainty solution into ControLog to define the uncertainty for the Model 3920 low humidity generator. Selecting this command will open an “Import Uncertainty” dialog that will step the user through the import process. Refer to your HumiCalc with Uncertainty Reference Manual for more information on creating uncertainty solutions.

  • Page 59: Graph Menu Tab

    This level is intended for factory support and should not be used regularly by the user of the 3920. A password is required for this level. The passwords are located on the yellow product key flyer delivered with the generator.
  • Page 60 Dragging the cursor up, scales the display in (zooms in) and dragging the cursor down, scales the display out (zoom out). Model 3920 System Manual – Document #OM3920 - Edition 2.1 May 2025...

  • Page 61: Data Menu Tab

    The Data Menu Tab will only operate on the currently selected data tab. For more information, refer to section 8 Data and Data Summary Model 3920 System Manual – Document #OM3920 - Edition 2.1 May 2025...
  • Page 62 The data summary can also calculate error between the specified standard and the device under test. This operation is available whenever there is an open Data tab that contains data. For more information, refer to section 8 Data and Data Summary Model 3920 System Manual – Document #OM3920 - Edition 2.1 May 2025...
  • Page 63 If the “Set as Default” is checked, the new value will become the default start up interval. If not checked, the new value will only affect the current session. Model 3920 System Manual – Document #OM3920 - Edition 2.1 May 2025...
  • Page 64 REASON, SOME CONSIDERATION SHOULD BE GIVEN TO THE AMOUNT OF DATA DESIRED, THE OVERALL TIME SPAN OF THE DATA (I.E. HOURS, POSSIBLY DAYS), AND ULTIMATELY THE DATA INTERVAL. Model 3920 System Manual – Document #OM3920 - Edition 2.1 May 2025...

  • Page 65: Device Settings Menu Tab

    Note Data is only recorded while the 3920 is in purge or generate mode. 4.1.10 Device Settings Menu Tab The Settings Menu Tab allows the user to change the settings of a device connection, disconnect a device connection and open an interface console to view communication with a device.
  • Page 66 The device console tab allows the user to view the commands being sent to and received from any given connected device. The user can select which connected device to view using the drop-down selection at the top of the tab. Model 3920 System Manual – Document #OM3920 - Edition 2.1 May 2025...

  • Page 67: Help

    The data sent to and received from the selected device is displayed in the lower text area of the console tab. 4.1.11 Help The Help Menu located on the right side of the ribbon menu, allows the user to open the 3920 System Manual (this document).

  • Page 68: Parameters Tab Group

    If multiple parameter tabs are open the user can accessed other tabs using the scroll bar at the bottom of the group. Model 3920 System Manual – Document #OM3920 - Edition 2.1 May 2025...

  • Page 69: Tiles

    Within each parameter tab area are tiles that allow the user to set setpoints, view actual values, and view real-time uncertainty values. There are two different tiles; a Setpoint Tile and a Value Tile. Model 3920 System Manual – Document #OM3920 - Edition 2.1 May 2025...
  • Page 70 For example, let’s say the user wants to calculate the lowest %RH achievable given a limited supply pressure of only 100 psi. Model 3920 System Manual – Document #OM3920 - Edition 2.1 May 2025...
  • Page 71 Start by opening the HumiCalc pop-up using the drop-down arrow at the right of the setpoint entry box. Next, select the known to be Saturation Pressure and enter the 100 psi supply pressure max. Model 3920 System Manual – Document #OM3920 - Edition 2.1 May 2025...
  • Page 72 Clicking the “Calculate” button will result in the calculated %RH based on the 100 psi limit being placed in the Setpoint Entry Box and will close the HumiCalc pop-up. Clicking “Ok” will close the setpoint entry and will send the setpoint to the Model 3920 Low Humidity generator.

  • Page 73: 3920 Parameter Tab

    The 3920 Parameters contain all the control and measurement parameters critical to the operation of the humidity generator. The 3920 Parameters can be scrolled up and down to show the currently generated humidity in different humidity terms that are calculated using the HumiCalc with Uncertainty engine, along with other values that are important to the operation of the 3920 generator.
  • Page 74 Dew Point may actually exist at indicated values below freezing (super-cooled dew). However, it is important to note that Dew Point is not the same as Frost Point. Dew Point is independent of test chamber temperature. Model 3920 System Manual – Document #OM3920 - Edition 2.1 May 2025...
  • Page 75 Saturation Vapor Pressure (SVP) computed at the Saturation Temperature. 4.2.2.17 F@Tt.Pt Enhancement Factor at Test Temperature and Pressure. 4.2.2.18 F@Td.Pt Enhancement Factor at Dew/Frost Point Temperature and Test Pressure. Model 3920 System Manual – Document #OM3920 - Edition 2.1 May 2025...
  • Page 76 Dry Air Mole Fraction is the mole fraction of the dry air portion of a sample. The dry air portion is considered to be all constituents in a gas exclusive of the water vapor. Model 3920 System Manual – Document #OM3920 - Edition 2.1 May 2025...
  • Page 77 4.2.2.34 Water Capacity Water capacity is an estimated percentage of water remaining in the system. Refer to section 5 Water Capacity for detailed instruction on how to add water. Model 3920 System Manual – Document #OM3920 - Edition 2.1 May 2025...

  • Page 78: Device Parameter Tabs

    4.2.3.1 Device Parameters Device Parameters contain all the most recent actual measurement parameters received from the device. Each parameter is displayed in a separate Value Tile. Model 3920 System Manual – Document #OM3920 - Edition 2.1 May 2025...

  • Page 79: Data And Graph Tab Group

    In addition to using the “Close Data” command from the ribbon menu a Data and Graph Tab can be closed depending on the state of the device or generator using the “X” in the upper right-hand corner. Model 3920 System Manual – Document #OM3920 - Edition 2.1 May 2025...

  • Page 80: Data Tabs

    For more information, refer to section 7 Graphing 4.3.3 Profile Tab The Profile Tab contains the profile point definitions for an auto profile. For more information, refer to section 9 Profiling Model 3920 System Manual – Document #OM3920 - Edition 2.1 May 2025...

  • Page 81: Information Tab Group

    The group can consist of a Status Log tab, 3920 Reported Errors tab and a 3920 Interface Console tab. By clicking the pin icon on any information tab, the user can pin or unpin the Information tabs.
  • Page 82 All Information Tabs have a context menu that is displayed by long pressing or right clicking in the tab. The context menu allows quick access to functions that can clear and save the information. Model 3920 System Manual – Document #OM3920 - Edition 2.1 May 2025...

  • Page 83: Status Log

    The 3920 Reported Errors tab only appears when the 3920 reports an error. This is a very important information tab because it reports 3920 system errors to the user. These types of errors can cause the 3920 to shutdown and require immediate attention by the operator. The icon will be displayed to help draw the attention of the user to the reported 3920 errors.

  • Page 84: Device Interface Console

    The data sent to the device is indicated by a bold “Sent:” label in the lower text area of the console tab. The data received from the device is indicated by a bold “Received:” label in the lower text area of the console tab. Model 3920 System Manual – Document #OM3920 - Edition 2.1 May 2025...

  • Page 85: Status Bar

    The status bar will show a green circular arrow icon and “System is purging” when the 3920 is purging. If the 3920 is reporting an error, the green circular arrow icon will also appear with a small yellow warning. 4.5.1.3 Generating The status bar will show a green forward arrow icon and “System is generating”...

  • Page 86: Auto Profile Controls And Status

    The Auto Profile status consists of the generator “Run Mode” for the current profile point, the “Profile Point” the system is currently running and the “Phase” of the current point. Model 3920 System Manual – Document #OM3920 - Edition 2.1 May 2025...

  • Page 87: Current Point Time

    Start by long pressing or right clicking anywhere within the status bar. A long press is when you touch and hold the screen. Long enough for a square selection box to appear. Releasing will open the status bar context menu. Model 3920 System Manual – Document #OM3920 - Edition 2.1 May 2025...
  • Page 88 Select “Set Date and Time” from the context menu to open the system Date and Time dialog. Model 3920 System Manual – Document #OM3920 - Edition 2.1 May 2025...

  • Page 89: Water Capacity

    To access the Water Capacity and Clear-Cycle dialog, select Water Capacity from the Generator Utilities menu. For more information, refer to section 12.4 Fluid System Model 3920 System Manual – Document #OM3920 - Edition 2.1 May 2025...

  • Page 90: Water Capacity

    Every time the unit is filled press the Reset button to reset the water capacity back to 100%. ***WARNING*** A POWER LOSS OR EVENT THAT CAUSES THE 3920 TO BE POWERED OFF WHILE PURGING OR GENERATING MAY CAUSE THE WATER CAPACITY ALGORITHM TO LOSE ITS LATEST CONSUMPTION VALUES. IT IS...

  • Page 91: Clear-Cycles Count

    The clear-cycle count is the number of clear-cycles to be performed. To change this number, click on the count tile and enter the desired value in the entry dialog. Model 3920 System Manual – Document #OM3920 - Edition 2.1 May 2025...

  • Page 92: Clear-Cycles Start

    To begin the clear-cycle process press the “Start” button. The generator will start purging and will begin to pressurize and vent with each cycle. Note – Set the desired mass flow rate on the 3920 Parameter Tab before starting clear cycles. The recommend flow rate is 2.0 L/min.

  • Page 93: Saturator Filling

    11) Open the “Water Capacity and Clear-Cycles” dialog by selecting Water Capacity from the Utilities tab. 12) Set the clear cycle count to 100 if not set already. Model 3920 System Manual – Document #OM3920 - Edition 2.1 May 2025...
  • Page 94 17) Continue purging for 24 hours. 18) While remaining in the Purge mode, adjust setpoints to the desired settings and allow the saturation temperature to achieve setpoint. Model 3920 System Manual – Document #OM3920 - Edition 2.1 May 2025...

  • Page 95: Calibration

    Note - The following information is provided as a recommendation for the calibration of the Thunder Scientific 3920 Humidity Generator. It is the user’s responsibility to ensure the standards used meet/exceed their organization’s specific test limit/guard banding requirements. Saturation Temperature, range -80 to +12 °C: •...

  • Page 96: Temperature Calibration

    EMPERATURE ALIBRATION The temperature calibration procedure is used in conjunction with the 3920 for calibration of the saturation temperature probe and in conjunction with a precision temperature bath for calibration of the test temperature probe. By using the 3920 or precision temperature bath to generate up to five known temperatures, the coefficients will be calculated automatically and used to update the system calibration for each temperature probe.
  • Page 97 Place a piece of masking tape 6” from the end of the reference thermometer to help with – determining the emersion depth into the saturator. This will also help to prevent the probe from sliding to far into the saturator and hitting the bottom. Model 3920 System Manual – Document #OM3920 - Edition 2.1 May 2025...
  • Page 98 7. Replace RTD access insulation to seal around reference thermometer. 8. Connect power and switch main console power to ON. Wait a few moments for the system to initialize and for the main screen to appear. Model 3920 System Manual – Document #OM3920 - Edition 2.1 May 2025...
  • Page 99 Select, “Take “As Received” points”. This will allow the user to take points with the current calibration to determine out of tolerance. After all “As Received” points have been taken the user will be asked whether they want to calculate new calibration coefficients. Model 3920 System Manual – Document #OM3920 - Edition 2.1 May 2025...
  • Page 100 Select the temperature probe to calibrate. In this example we will perform the calibration on the saturation temperature probe, but the same procedure can be done on the test temperature probe using a precision temperature bath instead of the 3920. Model 3920 System Manual – Document #OM3920 - Edition 2.1 May 2025...
  • Page 101 Enter the Name and ID of the standard being used. This information will be populated on the calibration report. Selecting “Next” without entering a Name will result in ControLog giving the standard a generic name. Model 3920 System Manual – Document #OM3920 - Edition 2.1 May 2025...
  • Page 102 An out of tolerance condition will be indicated by a red circle with an exclamation point for the out of tolerance probe in the Error column. Model 3920 System Manual – Document #OM3920 - Edition 2.1 May 2025...
  • Page 103 “true” value is at a given point based on the standard or reference value. The number of points determines the degree of the polynomial used to align or correct the generator with the standard or reference. Model 3920 System Manual – Document #OM3920 - Edition 2.1 May 2025...
  • Page 104 If using the 3920 as the temperature bath, generate the first temperature point (-80 °C) by entering -80 in the “Temperature Setpoint” row and “Value” column. Operate the 3920 in purge mode with a flow rate setpoint of 0.5 to 1 L/min while you perform the saturation temperature calibration. This will ensure the best temperature control performance during the calibration process.
  • Page 105 “Clear Point” button and then repeat the process to retake the point. Generate the second temperature point (-57.5 °C) by entering -57.5 in the “Temperature Setpoint” row and “Value” column. Model 3920 System Manual – Document #OM3920 - Edition 2.1 May 2025...
  • Page 106 Generate the third temperature point (-35 °C) by entering -35 in the “Temperature Setpoint” row and “Value” column. Once the readings are stable enter the standards value and click the “Take Point” button. Model 3920 System Manual – Document #OM3920 - Edition 2.1 May 2025...
  • Page 107 Generate the last temperature point (10 °C) by entering 10 in the “Temperature Setpoint” row and “Value” column. Once the readings are stable enter the standards value and click the “Take Point” button. Model 3920 System Manual – Document #OM3920 - Edition 2.1 May 2025...
  • Page 108 Clicking the “Save Reports” button will open a file dialog to save the report. The default file location is …Documents\Thunder Scientific\3920 ControLog\Reports\. If the report is saved in an Excel format, then each probe will appear in its own tab within the workbook. The user needs to save in a text-based format then a file for each probe calibrated will be created.
  • Page 109 If the user selected to calculate new coefficients, they will be calculated and displayed. If any problem calculating the coefficient occurs, ControLog will issue a message telling the user that the coefficients could not be calculated. Model 3920 System Manual – Document #OM3920 - Edition 2.1 May 2025...
  • Page 110 Next, the user will be asked to save the new coefficients to the system. Selecting “Yes” will result in the current coefficients being over-written by the newly calculated coefficients. Next, the user can view and save the calibration coefficients report for the probe. Model 3920 System Manual – Document #OM3920 - Edition 2.1 May 2025...
  • Page 111 ControLog allows the user to take as many “As Left” points as they would like. In this example we will check every 10°C points starting at -80 °C and ending at 10 °C. If using the 3920 as the temperature bath, generate the first temperature point (-80 °C) by entering -80 in the “Temperature Setpoint”...
  • Page 112 Tip - Use the “Next” and “Back” button to navigate between taken points. You can clear and retake a point by simply clicking the “Clear Point” button and then repeat the process to retake the point. Model 3920 System Manual – Document #OM3920 - Edition 2.1 May 2025...
  • Page 113 Generate the next temperature point (-60 °C) by entering -60 in the “Temperature Setpoint” row and “Value” column. Once the readings are stable enter the standards value and click the “Take Point” button. Model 3920 System Manual – Document #OM3920 - Edition 2.1 May 2025...
  • Page 114 Generate the next temperature point (-40 °C) by entering -40 in the “Temperature Setpoint” row and “Value” column. Once the readings are stable enter the standards value and click the “Take Point” button. Model 3920 System Manual – Document #OM3920 - Edition 2.1 May 2025...
  • Page 115 Generate the next temperature point (-20 °C) by entering -20 in the “Temperature Setpoint” row and “Value” column. Once the readings are stable enter the standards value and click the “Take Point” button. Model 3920 System Manual – Document #OM3920 - Edition 2.1 May 2025...
  • Page 116 Generate the last temperature point (10 °C) by entering 10 in the “Temperature Setpoint” row and “Value” column. Once the readings are stable enter the standards value and click the “Take Point” button. Model 3920 System Manual – Document #OM3920 - Edition 2.1 May 2025...
  • Page 117 Clicking the “Save Reports” button will open a file dialog to save the report. The default file location is …Documents\Thunder Scientific\3920 ControLog\Reports\. If the report is saved in an Excel format, then each probe will appear in its own tab within the workbook. The user wishes to save in a text-based format then a file for each probe calibrated will be created.

  • Page 118: Test Temperature

    Repeat this same calibration procedure for test temperature probe (RTD 2) using a Precision Temperature Bath instead of the 3920. There is no need to remove any panel as the test temperature probe connects via the front hood. Calibrate over the range of 10 °C to 50 °C. Example points are (10 °C, 20 °C, 30 °C, 40 °C, 50 °C) but can be any sequence of numbers within the range.

  • Page 119: Pressure Transducer Calibration

    Test Pressure Transducer (T2) - Calibrate from ambient to 50 psiA. • Supply Pressure Transducer (T3) - Calibrate from ambient to 300 psiG. • CAUTION! DO NOT ENABLE PRESSURE CONTROL WITH PRESSURE TRANSDUCERS DISCONNECTED FROM SYSTEM. Model 3920 System Manual – Document #OM3920 - Edition 2.1 May 2025...
  • Page 120 From the Units menu tab select the desired pressure units for calibration. Once calibration has begun, the units should not be changed again until the calibration is complete. Generator Calibration Utilities Select from the menu tab to open the Calibration Wizard. Model 3920 System Manual – Document #OM3920 - Edition 2.1 May 2025...
  • Page 121 After all “As Received” points have been taken the user will be asked whether they want to calculate new calibration coefficients. Set the type of calibration to Pressure. Model 3920 System Manual – Document #OM3920 - Edition 2.1 May 2025...
  • Page 122 Enter the Name and ID of the standard being used. This information will be populated on the calibration report. Selecting “Next” without entering a Name will result in ControLog giving the standard a generic name. Model 3920 System Manual – Document #OM3920 - Edition 2.1 May 2025...
  • Page 123 An out of tolerance condition will be indicated by a red circle with an exclamation point for the out of tolerance transducer in the Error column. Model 3920 System Manual – Document #OM3920 - Edition 2.1 May 2025...
  • Page 124 “true” value is at a given point based on the standard or reference value. The number of points determines the degree of the polynomial used to align or correct the generator with the standard or reference. Model 3920 System Manual – Document #OM3920 - Edition 2.1 May 2025...
  • Page 125 Tip - Use the “Next” and “Back” button to navigate between taken points. You can clear and retake a point by simply clicking the “Clear Point” button and then repeat the process to retake the point. Model 3920 System Manual – Document #OM3920 - Edition 2.1 May 2025...
  • Page 126 Using the pressure standard, generate and measure the next pressure point (75 psi). Once the readings are stable, enter the standards value and click the “Take Point” button. Model 3920 System Manual – Document #OM3920 - Edition 2.1 May 2025...
  • Page 127 Using the pressure standard, generate and measure the next pressure point (195 psi). Once the readings are stable, enter the standards value and click the “Take Point” button. Model 3920 System Manual – Document #OM3920 - Edition 2.1 May 2025...
  • Page 128 Clicking the “Save Reports” button will open a file dialog to save the report. The default file location is …Documents\Thunder Scientific\3920 ControLog\Reports\. Model 3920 System Manual – Document #OM3920 - Edition 2.1 May 2025...
  • Page 129 If the user selected to calculate new coefficients, they will be calculated and displayed. If any problem calculating the coefficient occurs, ControLog will issue a message telling the user that the coefficients could not be calculated. Model 3920 System Manual – Document #OM3920 - Edition 2.1 May 2025...
  • Page 130 Next, the user will be asked to save the new coefficients to the system. Selecting “Yes” will result in the current coefficient being over-written by the newly calculated coefficients. Next, the user can view and save the calibration coefficients report for the transducer. Model 3920 System Manual – Document #OM3920 - Edition 2.1 May 2025...
  • Page 131 “Standard” row and “Value” column. This is useful for seeing error values before a point is taken. Model 3920 System Manual – Document #OM3920 - Edition 2.1 May 2025...
  • Page 132 Tip - Use the “Next” and “Back” button to navigate between taken points. You can clear and retake a point by simply clicking the “Clear Point” button and then repeat the process to retake the point. Model 3920 System Manual – Document #OM3920 - Edition 2.1 May 2025...
  • Page 133 Using the pressure standard, generate and measure the next pressure point (150 psi). Once the readings are stable, enter the standards value and click the “Take Point” button. Model 3920 System Manual – Document #OM3920 - Edition 2.1 May 2025...
  • Page 134 Using the pressure standard, generate and measure the next pressure point (50 psi). Once the readings are stable, enter the standards value and click the “Take Point” button. Model 3920 System Manual – Document #OM3920 - Edition 2.1 May 2025...
  • Page 135 Clicking the “Save Reports” button will open a file dialog to save the report. The default file location is …Documents\Thunder Scientific\3920 ControLog\Reports\. Model 3920 System Manual – Document #OM3920 - Edition 2.1 May 2025...

  • Page 136: Test Pressure

    Just use best metrology practices when determining which points to take. For more details refer to section 6.2.2 Calibration Procedure. Note – The supply pressure transducer must be calibrated in gauge pressure. Model 3920 System Manual – Document #OM3920 - Edition 2.1 May 2025...

  • Page 137: Mass Flow Meter Calibration

    6.3.2 Calibration Procedure Connect the reference flow meter to the gas outlet on the top of the 3920. From the Units menu tab select the desired mass flow rate units for calibration. Once calibration has begun, the units should not be changed again until the calibration is complete.
  • Page 138 After all “As Received” points have been taken the user will be asked whether they want to calculate new calibration coefficients. Set the type of calibration to Flow and select the Mass Flow Rate as the item to calibrate. Model 3920 System Manual – Document #OM3920 - Edition 2.1 May 2025...
  • Page 139 Enter the Name and ID of the standard being used. This information will be populated on the calibration report. Selecting “Next” without entering a Name will result in ControLog giving the standard a generic name. Model 3920 System Manual – Document #OM3920 - Edition 2.1 May 2025...
  • Page 140 An out of tolerance condition will be indicated by a red circle with an exclamation point for the out of tolerance transducer in the Error column. Model 3920 System Manual – Document #OM3920 - Edition 2.1 May 2025...
  • Page 141 “true” value is at a given point based on the standard or reference value. The number of points determines the degree of the polynomial used to align or correct the generator with the standard or reference. Model 3920 System Manual – Document #OM3920 - Edition 2.1 May 2025...
  • Page 142 Set the saturation temperature setpoint to 0° C to avoid outputting high humidity to the flow • standard. Under the Generator>Operation tab, select "Purge" to start the system. • Wait until the saturation temperature reaches setpoint (0 °C). • Model 3920 System Manual – Document #OM3920 - Edition 2.1 May 2025...
  • Page 143 You can also enter a standard or reference value before taking a point by clicking the cell in the “Standard” row and “Value” column. This is useful for seeing error values before a point is taken. Model 3920 System Manual – Document #OM3920 - Edition 2.1 May 2025...
  • Page 144 Tip - Use the “Next” and “Back” button to navigate between taken points. You can clear and retake a point by simply clicking the “Clear Point” button and then repeat the process to retake the point. Model 3920 System Manual – Document #OM3920 - Edition 2.1 May 2025...
  • Page 145 Continue generating and advance the flow rate to the next point (2.5 l/m). Using the flow standard, measure the next point. Once the readings are stable enter the standards value and click the “Take Point” button. Model 3920 System Manual – Document #OM3920 - Edition 2.1 May 2025...
  • Page 146 Continue generating and advance the flow rate to the next point (7.5 l/m). Using the flow standard, measure the point and once the readings are stable enter the standards value and click the “Take Point” button. Model 3920 System Manual – Document #OM3920 - Edition 2.1 May 2025...
  • Page 147 Clicking the “Save Reports” button will open a file dialog to save the report. The default file location is …Documents\Thunder Scientific\3920 ControLog\Reports\. Model 3920 System Manual – Document #OM3920 - Edition 2.1 May 2025...
  • Page 148 Next, the user will be asked to save the new coefficients to the system. Selecting “Yes” will result in the current coefficient being over-written by the newly calculated coefficients. Model 3920 System Manual – Document #OM3920 - Edition 2.1 May 2025...
  • Page 149 Next, the user can view and save the calibration coefficients report for the flow meter. Model 3920 System Manual – Document #OM3920 - Edition 2.1 May 2025...
  • Page 150 Enter the first flow rate (10.0 l/m) in the Flow Setpoint “Value” cell to continue generating a 0 °C dew point. Using the flow standard, measure the point and once the readings are stable enter the standards value and click the “Take Point” button. Model 3920 System Manual – Document #OM3920 - Edition 2.1 May 2025...
  • Page 151 Tip - Use the “Next” and “Back” button to navigate between taken points. You can clear and retake a point by simply clicking the “Clear Point” button and then repeat the process to retake the point. Model 3920 System Manual – Document #OM3920 - Edition 2.1 May 2025...
  • Page 152 Continue generating and set the flow rate to the next point (5.0 l/m). Using the flow standard, measure the point and once the readings are stable enter the standards value and click the “Take Point” button. Model 3920 System Manual – Document #OM3920 - Edition 2.1 May 2025...
  • Page 153 Set the final flow rate to (0.0 l/m). Using the flow standard, measure the point and once the readings are stable enter the standards value and click the “Take Point” button. Model 3920 System Manual – Document #OM3920 - Edition 2.1 May 2025...
  • Page 154 Clicking the “Save Reports” button will open a file dialog to save the report. The default file location is …Documents\Thunder Scientific\3920 ControLog\Reports\. Model 3920 System Manual – Document #OM3920 - Edition 2.1 May 2025...

  • Page 155: Viewing And Editing Calibration Coefficients

    Note – Editing calibration coefficients requires Manager Access Level or above. Generator Calibration Utilities Select from the menu tab to open the Calibration Wizard. Select View or edit coefficients. Model 3920 System Manual – Document #OM3920 - Edition 2.1 May 2025...
  • Page 156 Select the type of calibration and the items you wish to view or edit coefficients for. The calibration coefficients are then shown for the selected items. Model 3920 System Manual – Document #OM3920 - Edition 2.1 May 2025...
  • Page 157 Next, the user will be asked to save the new coefficients to the system. Selecting “Yes” will result in the current coefficient being over-written by the newly calculated coefficients. Model 3920 System Manual – Document #OM3920 - Edition 2.1 May 2025...
  • Page 158 Clicking the “Save Reports” button will open a file dialog to save the report. The default file location is …Documents\Thunder Scientific\3920 ControLog\Reports\. If the report is saved in an Excel format, then each probe or transducer will appear in its own tab within the workbook. The user wishes to save in a text- based format then a file for each probe calibrated will be created.

  • Page 159: Graphing

    Each graph tab consists of a two-dimension plot across an X and Y Axis. The graph can be customized to display different point symbols, various line colors, a legend and a header. Model 3920 System Manual – Document #OM3920 - Edition 2.1 May 2025...

  • Page 160: Creating A New Graph

    “New” from the Home Menu Tab, Graph Menu Tab or right click any graph tab and select “New” from its context menu. A “New Graph Wizard” dialog will appear. Model 3920 System Manual – Document #OM3920 - Edition 2.1 May 2025...
  • Page 161 The user can invert any selection by right clicking. This will highlight all items that are not currently highlighted and will remove highlight from any items that are currently highlighted. Model 3920 System Manual – Document #OM3920 - Edition 2.1 May 2025...

  • Page 162: Line Properties

    Line Properties define the color and point symbol for the selected line. Select the desired line from the selection box and set the Color, Symbol, whether to smooth the line, and whether to show data labels and how often to show them. Model 3920 System Manual – Document #OM3920 - Edition 2.1 May 2025...

  • Page 163: Chart Properties

    Selection Mode allows the user to highlight different lines within the graph. • Once complete, clicking the “Finish” button will display the new graph in the Data and Graph Tab Group. Model 3920 System Manual – Document #OM3920 - Edition 2.1 May 2025...

  • Page 164: Customizing A Graph

    Panning is useful when you have zoomed the graph and want to view different parts of the data without changing the scaling. Model 3920 System Manual – Document #OM3920 - Edition 2.1 May 2025...

  • Page 165: Zoom

    The portion of the graph within the drag box will expand to fill the entire graph. The time and Y-axis limits update accordingly. Model 3920 System Manual – Document #OM3920 - Edition 2.1 May 2025...

  • Page 166: Zoom Graph's X Axis

    X-axis (time axis) of interest is contained within the two vertical dashed lines. The portion contained within this region will expand to fill the entire X-axis. The Y-axis remains unchanged. Model 3920 System Manual – Document #OM3920 - Edition 2.1 May 2025...

  • Page 167: Zoom Graph's Y Axis

    The Scale Y Axis command allows the user to scale the Y axis. Dragging the cursor up scales the Y Axis in (zooms Y Axis in) and dragging the cursor down scales the Y Axis out (zooms Y Axis out). Model 3920 System Manual – Document #OM3920 - Edition 2.1 May 2025...

  • Page 168: Graph Properties

    Clicking the “Back” button will move back to the data selection page where the user can select which device items they would like to include in the graph. Model 3920 System Manual – Document #OM3920 - Edition 2.1 May 2025...
  • Page 169 Note The maximum, minimum, middle, and span values are interrelated and changing any one value may result in another value automatically changing to assure all values mathematically equate. Model 3920 System Manual – Document #OM3920 - Edition 2.1 May 2025...
  • Page 170 X Axis maximum. The graph will constantly expand as new data points are recorded. Once complete, clicking the “Finish” button will display the graph in the same tab with the new property settings. Model 3920 System Manual – Document #OM3920 - Edition 2.1 May 2025...

  • Page 171: Saving A Graph

    W3C Portable Network Graphics (*.png) • EMF Enhanced Metafile Format (*.emf) To perform the save, select “Save” from the graph menu tab or right click a graph and select “Save”. Model 3920 System Manual – Document #OM3920 - Edition 2.1 May 2025...
  • Page 172 Using the “Save” dialog, select the location, name and graphic type you want to the save the graph as. Note ControLog defaults the file name to the name of the graph tab. Model 3920 System Manual – Document #OM3920 - Edition 2.1 May 2025...

  • Page 173: Data And Data Summary

    The data tab data is always stored in SI units regardless of the current system unit settings. The only exception is for Data Summary tabs which are created using currently selected system units but will not update on further unit changes. Model 3920 System Manual – Document #OM3920 - Edition 2.1 May 2025...
  • Page 174 The user can navigate through the data using the scroll bars . Model 3920 System Manual – Document #OM3920 - Edition 2.1 May 2025...
  • Page 175 The user can also select specific data by clicking and draging the desired cells. Model 3920 System Manual – Document #OM3920 - Edition 2.1 May 2025...
  • Page 176 The user can then copy selected data to the clipboard by selecting “Copy Selection” from the context menu or by using the keyboard shortcut combination of Crtl+C. Model 3920 System Manual – Document #OM3920 - Edition 2.1 May 2025...

  • Page 177: Device Data Tabs

    Note Data is only recorded while the 3920 is in generate mode. Data is also stored at the generate rate whenever a device is connected and the 3920 is not connected. This gives the user the ability to use ControLog as a logging application for any device they connect without the need of a Model 3920 Low Humidity generator.

  • Page 178: File Data Tabs

    To open a data file, select “Open>Data File” from the file menu. Note - ControLog has a limit of five file data tabs opened at any given time. Model 3920 System Manual – Document #OM3920 - Edition 2.1 May 2025...
  • Page 179 Using the “Load Data File” dialog, browse and select the data file you want to open. Model 3920 System Manual – Document #OM3920 - Edition 2.1 May 2025...
  • Page 180 Once the load is complete the loaded file data tab will be displayed. Model 3920 System Manual – Document #OM3920 - Edition 2.1 May 2025...

  • Page 181: Data Summary Tabs

    Data Summary tabs are created using the currently selected system units instead of SI units. ControLog has a limit of five data summary tabs opened at any given time. Model 3920 System Manual – Document #OM3920 - Edition 2.1 May 2025...

  • Page 182: Creating A Data Summary

    The next step in the data summary creation process is to select the standard. The standard will be used as the reference to calculate differences between the device data items if the user chooses to do so. Model 3920 System Manual – Document #OM3920 - Edition 2.1 May 2025...
  • Page 183 Only one device can be selected as the standard for the summary. To remove an item as the selected standard, select the desired item from the right-hand side and click the “Remove” button. Model 3920 System Manual – Document #OM3920 - Edition 2.1 May 2025...
  • Page 184 To remove an item from the list of devices, select the desired item or items from the right-hand side and click the “Remove” button. Model 3920 System Manual – Document #OM3920 - Edition 2.1 May 2025...
  • Page 185 To remove an item or items from the list of data items, select the desired item or items from the right- hand side and click the “Remove” button. Model 3920 System Manual – Document #OM3920 - Edition 2.1 May 2025...
  • Page 186 To pair a data item, select the desired device data item and the standard data item you would like to pair it with. Select “Add” to create the pairing. Model 3920 System Manual – Document #OM3920 - Edition 2.1 May 2025...
  • Page 187 It is also recommended to select a small time interval (1 second) to assure all data is encompassed because often manual devices have irregular time intervals between points. Model 3920 System Manual – Document #OM3920 - Edition 2.1 May 2025...

  • Page 188: Recorded Data Points Tab

    Each data point can also calculate the average and or standard deviation for the defined number of prior points taken with each recorded data point. Note Each entry point in the Recorded Data Points tab is created using the currently selected system units. Model 3920 System Manual – Document #OM3920 - Edition 2.1 May 2025...

  • Page 189: How To Record A Data Point

    The first step in recording data points is to configure what and how to take each point. Use the Settings menu to open the Record Data Point Wizard to define the data points to be taken. A “Record Data Point Wizard” dialog will appear. Model 3920 System Manual – Document #OM3920 - Edition 2.1 May 2025...
  • Page 190 The user can invert any selection by right clicking. This will highlight all items that are not currently highlighted and will remove highlight from any items that are currently highlighted. Model 3920 System Manual – Document #OM3920 - Edition 2.1 May 2025...
  • Page 191 ControLog will include the number of prior (last) points directly using the entries in the Data Tab for the given point from the time the data point was recorded. Model 3920 System Manual – Document #OM3920 - Edition 2.1 May 2025...
  • Page 192 Automatically after manual device entry indicates that a point will be taken automatically when • the user completes a manual device entry. Model 3920 System Manual – Document #OM3920 - Edition 2.1 May 2025...
  • Page 193 Once complete, clicking the “Finish” will close the wizard and save the user selection for recording data points. Model 3920 System Manual – Document #OM3920 - Edition 2.1 May 2025...

  • Page 194: Auto Profiling

    Generate mode of operation. The Profile Tab is used to create and modify auto profiles. The tab consist of drop drowns, entry fields and a data grid. Model 3920 System Manual – Document #OM3920 - Edition 2.1 May 2025...
  • Page 195 The scrollbar at the bottom can be used to scroll to the remaining profile fields. Model 3920 System Manual – Document #OM3920 - Edition 2.1 May 2025...

  • Page 196: Creating A New Profile

    ROFILE A profile is a list of humidity, temperature, pressure, flow, and time parameters that are used during automated control of the Model 3920 Low Humidity generator. The profile essentially programs the computer/controller operations. Open a new profile tab by selecting “New” from the profile menu.
  • Page 197 The first column, next to the point numbers, is the Generator Mode. The Generator Mode defines the run mode that the 3920 will operate in for this profile point. The Generator Modes are the same run modes available during manual operation.
  • Page 198 Saturation Pressure as the Control Mode. Next, enter a 25.0 °C Temperature and then click the Saturation Pressure HumiCalc drop down at the right of the grid cell box. Model 3920 System Manual – Document #OM3920 - Edition 2.1 May 2025...
  • Page 199 ControLog automatically entered the other known values based on the already entered profile values. Clicking the “Calculate” button will result in the calculated Saturation Pressure being placed in the profile cell and the HumiCalc dropdown will close. Model 3920 System Manual – Document #OM3920 - Edition 2.1 May 2025...
  • Page 200 The Chamber Fan Speed column contains percent speed value of the chamber fan for the point. 0 meaning the fan is off and 100 meaning the fan is at full speed. Model 3920 System Manual – Document #OM3920 - Edition 2.1 May 2025...
  • Page 201 Ramp Time is the desired amount of time the 3920 should take to transition from one profile test point to another. Setting a ramp time of zero instructs the 3920 to make the transition as quickly as possible. Zero is the setting used for most profiles.
  • Page 202 If Assurance is set to “Yes”, a small “Add” button will appear on the right-hand side. Clicking the “Add” button will open the “Assurance Conditions” dialog for the point. The dialog allows the user to enter various assurance conditions for the profile point. Model 3920 System Manual – Document #OM3920 - Edition 2.1 May 2025...
  • Page 203 Note Tolerances can only be entered for 3920 setpoints. The field will be grayed out for all other non 3920 setpoint device items. This is because ControLog can only assure a tolerance for an item that it has the ability to control.
  • Page 204 Update button. To delete an assurance condition, select the desired condition from the list at the bottom and select the Delete button. Once all assurance conditions have been completed, select the “Ok” button to close the dialog. Model 3920 System Manual – Document #OM3920 - Edition 2.1 May 2025...
  • Page 205 New points can also be inserted between existing points by long pressing or right clicking and selecting “Insert Point” from the context menu. ControLog will insert a new point at the selected location and will automatically predict the values. Model 3920 System Manual – Document #OM3920 - Edition 2.1 May 2025...
  • Page 206 Existing points can also be deleted by selecting the desired point and then by long pressing or right clicking and selecting “Delete Point” from the context menu. Profile points that cause operational issues for the 3920 are automatically flagged by ControLog and are indicated by a red circle with an exclamation point .
  • Page 207 An explanation of the issue will also be displayed. Model 3920 System Manual – Document #OM3920 - Edition 2.1 May 2025...

  • Page 208: Saving A Profile

    The Profile tab can be saved to file for future recall. ControLog Auto Profiles are saved in XML format with a *.profile extension. To perform the save, select “Save” from the main menu or right click a profile tab and select “Save”. Model 3920 System Manual – Document #OM3920 - Edition 2.1 May 2025...
  • Page 209 Using the “Save Profile” dialog, select the location and name you want to the save the profile as. Model 3920 System Manual – Document #OM3920 - Edition 2.1 May 2025...

  • Page 210: Opening A Profile

    9.3 O PENING A ROFILE Profiles can be loaded from previously saved profile files. To perform the open, select “Open” from the file menu and select Profile. Model 3920 System Manual – Document #OM3920 - Edition 2.1 May 2025...
  • Page 211 Using the “Open Profile” dialog, browse and select the profile file that you want to open. Once the load is complete, the profile tab will be displayed with the loaded profile points. Model 3920 System Manual – Document #OM3920 - Edition 2.1 May 2025...

  • Page 212: Running An Auto Profile

    To run an auto profile, select “Run Auto Profile” from the main menu or right click a profile tab and select “Run Auto Profile”. Note While operating the system in the Auto Profile mode, manual setpoint and mode changes are not allowed. Model 3920 System Manual – Document #OM3920 - Edition 2.1 May 2025...
  • Page 213 RUNNING A PROFILE WITH ERRORS MAY CAUSE ADVERSE BEHAVIOR DURING THE PROFILE RUN. THE USER IS STRONGLY ENCOURAGED TO ADDRESS AND FIX ALL PROFILE ISSUES BEFORE ATTEMPTING TO RUN THE PROFILE. Model 3920 System Manual – Document #OM3920 - Edition 2.1 May 2025...

  • Page 214: Understanding Profile Phases

    The Assurance Phase forces the system to wait until measured parameters and setpoint values are within a specified tolerance and/or stability before the computer starts the Soak Phase. Model 3920 System Manual – Document #OM3920 - Edition 2.1 May 2025...
  • Page 215 During the assurance phase, assurance conditions that have not been met will be displayed with a yellow footer block for Setpoint Tile and a yellow header block for Value Tile on the parameter tab of the device containing the condition. Model 3920 System Manual – Document #OM3920 - Edition 2.1 May 2025...
  • Page 216 Example 1 Example 1 causes the Soak phase to begin immediately at the start of the profile point, even though the 3920 may still be adjusting to the point. The next point will start after the 1-hour soak phase. 9.4.1.5 Example 2 Example 2 causes the Assurance phase to begin immediately at the start of the profile point.

  • Page 217: Manual Override Of Profile

    While in a hold mode, the system is prevented from completing the ramp, assurance, or soak phases of a point. Model 3920 System Manual – Document #OM3920 - Edition 2.1 May 2025...
  • Page 218 Saturation Pressure, Saturation Temperature and Flow. Another way to exit the Auto Profile is to switch from Auto Profile to Generate or Shutdown. Model 3920 System Manual – Document #OM3920 - Edition 2.1 May 2025...

  • Page 219: Connections

    It is always recommended to have the manufacturer’s documentation for the device being connected while creating the new connection. It is also recommended to use a terminal-based application to test the various commands before creating a new connection. Model 3920 System Manual – Document #OM3920 - Edition 2.1 May 2025...

  • Page 220: Serial Connection

    The system supports both a “request to receive” type of communication as well as a “receive only” type of communication. NOTE: MOXA® line of USB to serial adapters are pre-configured to work with the 3920. Contact Thunder Scientific support for more information. Refer to section 2.4 Technical Support.
  • Page 221 These commands are only required if you need to send special commands to configure the device before data request and response commands are processed. Model 3920 System Manual – Document #OM3920 - Edition 2.1 May 2025...
  • Page 222 A device response message could contain multiple data items. Later you will select the number of data items that each response message contains. Model 3920 System Manual – Document #OM3920 - Edition 2.1 May 2025...
  • Page 223 Select whether a command needs to be sent to request a response. If the device requires a command to be sent to receive a response, then select “Yes”. If the device automatically outputs data without any request, then select “No”. Model 3920 System Manual – Document #OM3920 - Edition 2.1 May 2025...
  • Page 224 If a command was required, then enter the ASCII Command or Commands to request the desired data from the device. Refer to the legend to enter special characters such as carriage returns and/or line feeds. Note All commands are case sensitive. Model 3920 System Manual – Document #OM3920 - Edition 2.1 May 2025...
  • Page 225 Select whether the response has a delimiter that is separating each data item. For example, if the response contains Dew Point, Frost Point and Pressure with a comma between each data item then each item is separated by a comma delimiter. Model 3920 System Manual – Document #OM3920 - Edition 2.1 May 2025...
  • Page 226 ASCII character. This dialog will repeat for each data item in the response. Note The syntax cannot contain both a Flag and a Numeric syntax definition. If the user requires both, then create another data item to define them separately. Model 3920 System Manual – Document #OM3920 - Edition 2.1 May 2025...
  • Page 227 It is important to have sufficient numeric definition to assure all possible numeric responses will be covered, especially when a device responds with scientific notation or varying precession. Model 3920 System Manual – Document #OM3920 - Edition 2.1 May 2025...
  • Page 228 -100 and 1 corresponds to 100. The user can then enter these scaling values and ControLog will automatically apply the scaling to the data item whenever it is displayed or logged. Model 3920 System Manual – Document #OM3920 - Edition 2.1 May 2025...
  • Page 229 If “None” is selected, then ControLog will treat the data item as a simple number and will display and record the value exactly as it is received. Model 3920 System Manual – Document #OM3920 - Edition 2.1 May 2025...
  • Page 230 The newly calculated %RH will have the same name as the specified Data Item Name but will be preceded by “%RH@”. In the below example the calculated %RH will appear as “%RH@Data Point”. Model 3920 System Manual – Document #OM3920 - Edition 2.1 May 2025...
  • Page 231 Enter the End of Transmit (EOT) character that is sent after the response. This is the ASCII character that is sent at the end of transmission of the response. Refer to the legend to enter special characters such as carriage returns and/or line feeds. Model 3920 System Manual – Document #OM3920 - Edition 2.1 May 2025...
  • Page 232 Next, the user can select whether to connect to the device now or to exit without connecting. Note The user can connect at any time by loading the device from the Connections menu. Model 3920 System Manual – Document #OM3920 - Edition 2.1 May 2025...
  • Page 233 Select the communication port that the device is connected to and select the port settings for the device. CAUTION! INCORRECT RTS AND DTR SETTINGS CAN PROHIBIT COMMUNICATION. REFER TO THE DEVICE MANUFACTURER’S DOCUMENTATION TO VERIFY ALL DEVICE PORT SETTINGS. Model 3920 System Manual – Document #OM3920 - Edition 2.1 May 2025...
  • Page 234 NOT REPLY WITHIN THE DESIRED ABOUT OF TIME. Select “Show Interface Console” to automatically open a Device Interface Console tab once communication has been established with the device. Model 3920 System Manual – Document #OM3920 - Edition 2.1 May 2025...

  • Page 235: Serial Connection Example 1

    Mirror. We will request the Frost Point temperature and Atmospheric Pressure from the mirror as data items. Start by selecting “New Device” from the Home menu tab. Select “Serial” as the type of device connection. Model 3920 System Manual – Document #OM3920 - Edition 2.1 May 2025...
  • Page 236 Enter “373 Dew Point Mirror” as the name for the device. For the 373 we do not need to send any setup commands. Model 3920 System Manual – Document #OM3920 - Edition 2.1 May 2025...
  • Page 237 The 373 will send two responses; one with the requested Frost Point value and the other with the requested Atmospheric Pressure value. The 373 requires a request command to be sent to receive either the Frost Point value or the Atmospheric Pressure value. Model 3920 System Manual – Document #OM3920 - Edition 2.1 May 2025...
  • Page 238 The documentation also states the command must be terminated with a carriage return or a carriage return line feed combination. The 373 will respond to the frost point command with a single numeric value and therefore no delimiter is used. Model 3920 System Manual – Document #OM3920 - Edition 2.1 May 2025...
  • Page 239 The response from the frost point command will only contain a single numeric value. Model 3920 System Manual – Document #OM3920 - Edition 2.1 May 2025...
  • Page 240 373. The response value is the actual value so there is no need to define any type of scaling. According to the 373 documentation, each response is terminated with a carriage return and line feed. Model 3920 System Manual – Document #OM3920 - Edition 2.1 May 2025...
  • Page 241 Next, we define the command for the second response. Referring to the 373 documentation we enter the command for atmospheric pressure. Again, the command must be terminated with a carriage return or carriage return line feed combination. Model 3920 System Manual – Document #OM3920 - Edition 2.1 May 2025...
  • Page 242 The 373 will respond to the atmospheric pressure command with a single numeric value and therefore no delimiter is used. The response from the atmospheric pressure command will only contain a single numeric value. Model 3920 System Manual – Document #OM3920 - Edition 2.1 May 2025...
  • Page 243 Pascal as stated in the documentation. The response value is the actual value so there is no need to define any type of scaling. The response is terminated with a carriage return and line feed. Model 3920 System Manual – Document #OM3920 - Edition 2.1 May 2025...
  • Page 244 Save the newly created device to a file so that it can be recalled at a later time. Select to connect to the device now. Model 3920 System Manual – Document #OM3920 - Edition 2.1 May 2025...
  • Page 245 Select the port the 373 is connected to. Notice that ControLog indicates which ports are in use. Refer to the 373 documentation for specific port settings: The default access interval of 1.5 seconds is entered. Model 3920 System Manual – Document #OM3920 - Edition 2.1 May 2025...
  • Page 246 Note that both the parameter tab and data tab have the two data items we defined. Notice that since we defined what unit the data items were received in, ControLog is able to convert the values into the selected units for easy reading. Model 3920 System Manual – Document #OM3920 - Edition 2.1 May 2025...

  • Page 247: Serial Connection Example 2

    The DP-30 does not require any request to receive data. Instead, it constantly outputs three data messages at a periodic rate. Start by selecting “New” from the Connections menu. Select “Serial” as the type of device connection. Model 3920 System Manual – Document #OM3920 - Edition 2.1 May 2025...
  • Page 248 Enter “DP 30 with Options” as the name for the device. For the DP-30 we do not need to send any setup commands. Model 3920 System Manual – Document #OM3920 - Edition 2.1 May 2025...
  • Page 249 Dry Temperature value and one with the Pressure value. The DP-30 does not require any command to be sent to receive a response. The DP-30 automatically transmits the messages. Model 3920 System Manual – Document #OM3920 - Edition 2.1 May 2025...
  • Page 250 For the first message, we enter the response identification of the Dew Point Temperature message. The DP-30 Dew Point Temperature message is of a fixed format and does not use any delimiter. Model 3920 System Manual – Document #OM3920 - Edition 2.1 May 2025...
  • Page 251 “X”s after the flag symbol. Next, we define these flag definitions and give them a simple “Yes” or “No” description to allow the user to easily determine their state in the parameter tab. Model 3920 System Manual – Document #OM3920 - Edition 2.1 May 2025...
  • Page 252 “S” indicating that it is running. We again define these flag definitions and give them a simple “Yes” or “No” description to allow the user to easily determine the state in the parameter tab. Model 3920 System Manual – Document #OM3920 - Edition 2.1 May 2025...
  • Page 253 “S” indicating that it is in standby. We again define these flag definitions and give them a simple “Yes” or “No” description to allow the user to easily determine the state in the parameter tab. Model 3920 System Manual – Document #OM3920 - Edition 2.1 May 2025...
  • Page 254 This syntax will closely resemble the syntax defined in the DP-30 documentation for the dew point temperature message. The Green portion of the syntax is the current data item’s syntax within the response message. Model 3920 System Manual – Document #OM3920 - Edition 2.1 May 2025...
  • Page 255 The Dew Point Temperature message is terminated with a carriage return. Next, we define the response identification for the second message. Referring to the DP-30 documentation we enter the identification for the Dry Temperature message. Model 3920 System Manual – Document #OM3920 - Edition 2.1 May 2025...
  • Page 256 The DP-30 Dry Temperature message is of a fixed format and does not use any delimiter. The Dry Temperature message contains only one numeric value; therefore, there is only one data item for this response. Model 3920 System Manual – Document #OM3920 - Edition 2.1 May 2025...
  • Page 257 We define the numeric syntax exactly as the DP-30 documentation specifies. Again, the response value is the actual value so there is no need to define any type of scaling. The Dry Temperature message is terminated with a carriage return. Model 3920 System Manual – Document #OM3920 - Edition 2.1 May 2025...
  • Page 258 We now define the response identification for the third and last message. Referring to the DP-30 documentation we enter the identification for the Pressure message. The DP-30 Pressure message is of a fixed format and does not use any delimiter. Model 3920 System Manual – Document #OM3920 - Edition 2.1 May 2025...
  • Page 259 The Pressure message contains only one numeric value therefore there is only one data item for this response. Model 3920 System Manual – Document #OM3920 - Edition 2.1 May 2025...
  • Page 260 Again, the response value is the actual value so there is no need to define any type of scaling. The Pressure message is terminated with a carriage return. Model 3920 System Manual – Document #OM3920 - Edition 2.1 May 2025...
  • Page 261 Save the newly created device to a file so that it can be recalled at a later time. Select to connect to the device now. Model 3920 System Manual – Document #OM3920 - Edition 2.1 May 2025...
  • Page 262 Select the port the DP-30 is connected to. Notice that ControLog indicates which ports are in use. Refer to the DP-30 documentation for the RS-232 port settings: Use the default access rate of 1.5 seconds. Model 3920 System Manual – Document #OM3920 - Edition 2.1 May 2025...
  • Page 263 Once communication is successfully established with the DP-30, a new parameter tab and data tab will be created. Notice that ControLog automatically translates the ASCII flags based on the definitions described when creating the data items for the connection. Model 3920 System Manual – Document #OM3920 - Edition 2.1 May 2025...

  • Page 264: Analog Connection

    To create a new analog connection, select “New” from the Connections menu. This will open a “Connection Wizard” dialog that will step the user through the connection definition process. Select “Analog” as the type of connection the device uses. Model 3920 System Manual – Document #OM3920 - Edition 2.1 May 2025...
  • Page 265 Enter the number of analog signals you want to monitor. This is the combined number of analog signals from each device you wish to monitor. Each analog signal connected to the 34970A will represent a single data item parameter. Model 3920 System Manual – Document #OM3920 - Edition 2.1 May 2025...
  • Page 266 This dialog will repeat for each monitored signal. The function defines what type of analog signal the device uses. Model 3920 System Manual – Document #OM3920 - Edition 2.1 May 2025...
  • Page 267 The range specifies the range for which the analog signal operates within. The available range selection changes automatically to reflect what is available for the selected function. For example, the Resistance function has a Range from 100 Ohms to 100 Mega Ohms. Model 3920 System Manual – Document #OM3920 - Edition 2.1 May 2025...
  • Page 268 If “None” is selected, then ControLog will treat the data item as a simple number and will display and record the value exactly as it is received. Model 3920 System Manual – Document #OM3920 - Edition 2.1 May 2025...
  • Page 269 The signal value represents the “raw” analog signal. The data value represents the actual value or real-world value at the given signal value. Model 3920 System Manual – Document #OM3920 - Edition 2.1 May 2025...
  • Page 270 All device connection files are saved in XML format with a (*.device) extension. Model 3920 System Manual – Document #OM3920 - Edition 2.1 May 2025...
  • Page 271 Next, the user can select whether to connect to the device now or to exit without connecting. Note The user can connect at any time by loading the device from the Connections menu. Model 3920 System Manual – Document #OM3920 - Edition 2.1 May 2025...
  • Page 272 ControLog defaults to the default port settings for the Agilent® 34970A Data Acquisition/Switch Unit. Refer to the Agilent® documentation for instructions on viewing or setting the Data Acquisition RS-232 settings. Model 3920 System Manual – Document #OM3920 - Edition 2.1 May 2025...
  • Page 273 As a general rule of thumb, use 1.5 seconds per every 10 signals connected to the Data Acquisition Unit with a minimum access interval of 1.5 seconds. Model 3920 System Manual – Document #OM3920 - Edition 2.1 May 2025...

  • Page 274: Analog Connection Example

    -10 to +10V input signal that we will scale to a Dew Point/Frost Point Temperature, a Temperature Thermistor and a 4-wire Temperature RTD. Start by selecting “New” from the Connections menu. Select “Analog” as the type of device connection. Model 3920 System Manual – Document #OM3920 - Edition 2.1 May 2025...
  • Page 275 Enter “Analog Dew Point Device” as the name for the device. In this example we have three signals that we want to monitor; a voltage, thermistor and an RTD. Model 3920 System Manual – Document #OM3920 - Edition 2.1 May 2025...
  • Page 276 Dew Point temperature of +100 °C. By entering scaling ControLog will automatically scale the signal for display in the parameter tab and when recorded in the data tab. Model 3920 System Manual – Document #OM3920 - Edition 2.1 May 2025...
  • Page 277 Since the signal value is the actual temperature value, no scaling is required for this data item. Model 3920 System Manual – Document #OM3920 - Edition 2.1 May 2025...
  • Page 278 10 to provide the source and sense connections for an RTD. Given this, the RTD in this example will occupy both channel 110 and 120 to complete its 4-wire connection. Model 3920 System Manual – Document #OM3920 - Edition 2.1 May 2025...
  • Page 279 Since the signal value is the actual temperature value, no scaling is required for this data item. Save the newly created device to a file so it can be recalled at a later time. Model 3920 System Manual – Document #OM3920 - Edition 2.1 May 2025...
  • Page 280 Select to connect to the device now. Select the communication port that the Agilent ® 34970A Data Acquisition/Switch Unit is connected to and select the port settings for the 34970A. Model 3920 System Manual – Document #OM3920 - Edition 2.1 May 2025...
  • Page 281 10 signals, so we can start with the minimum access interval of 1.5 seconds. Once completed, ControLog will attempt to establish communication with the Agilent ® 34970A Data Acquisition/Switch Unit. Model 3920 System Manual – Document #OM3920 - Edition 2.1 May 2025...
  • Page 282 Once communication is successfully established with the 34970A, a new parameter tab and data tab will be created. Notice that ControLog automatically scales the voltage signal based on the definitions described when defining the data item. Model 3920 System Manual – Document #OM3920 - Edition 2.1 May 2025...

  • Page 283: Manual Connection

    To create a manual connection, select “New” from the Connections menu. This will open a “Connection Wizard” dialog that will step the user through the connection definition process. Select “Manual” as the type of connection the device uses. Model 3920 System Manual – Document #OM3920 - Edition 2.1 May 2025...
  • Page 284 Enter a unique name for the device. Select the number of manual data entries. Model 3920 System Manual – Document #OM3920 - Edition 2.1 May 2025...
  • Page 285 Celsius, then the user will enter manual values in degrees Celsius. If the system units are set to degrees Fahrenheit, then the user will be required to enter manual values in degrees Fahrenheit. Model 3920 System Manual – Document #OM3920 - Edition 2.1 May 2025...
  • Page 286 Last, the user selects whether to connect to the device now or to exit without connecting. Note - The user can connect at any time by loading the device from the Connections menu. Model 3920 System Manual – Document #OM3920 - Edition 2.1 May 2025...

  • Page 287: Manual Connection Example

    This example will demonstrate the creation of a Manual connection that will consist of three data items: Frost Point, Test Pressure and Test Temperature. Start by selecting “New” from the Connections menu. Select “Manual” as the type of connection the device uses. Model 3920 System Manual – Document #OM3920 - Edition 2.1 May 2025...
  • Page 288 Enter “Manual Device” as the name for the device. We have three data items that we want to manually enter for this device. Model 3920 System Manual – Document #OM3920 - Edition 2.1 May 2025...
  • Page 289 The first point is Frost Point and it will be of the temperature unit type. The second point is Test Pressure and it will be of the pressure unit type. Model 3920 System Manual – Document #OM3920 - Edition 2.1 May 2025...
  • Page 290 The third point is Test Temperature and it will be of the temperature unit type. Save the newly created device to a file so that it can be recalled at a later time. Model 3920 System Manual – Document #OM3920 - Edition 2.1 May 2025...
  • Page 291 Select to connect to the device now. Model 3920 System Manual – Document #OM3920 - Edition 2.1 May 2025...
  • Page 292 Once completed, a new parameter tab and data tab will be created. Model 3920 System Manual – Document #OM3920 - Edition 2.1 May 2025...
  • Page 293 Note - The manual entries will not be recorded in the data tab until all data item values have been manually entered. Enter the manual value into the Manual Entry box and select Ok. Model 3920 System Manual – Document #OM3920 - Edition 2.1 May 2025...
  • Page 294 The manual entry will now be displayed in the value tile of the parameter tab. Repeat the process for the remaining data items. Model 3920 System Manual – Document #OM3920 - Edition 2.1 May 2025...
  • Page 295 Once all data items have been manually entered, ControLog will record the values and clear out the value tiles in preparation for the next set of manual entries. Model 3920 System Manual – Document #OM3920 - Edition 2.1 May 2025...

  • Page 296: Opening A Device Connection

    EVICE ONNECTION Saved device connections can be loaded from previously saved device configuration files. To perform the open, select “Open” from the file menu and select Device Configuration. Model 3920 System Manual – Document #OM3920 - Edition 2.1 May 2025...

  • Page 297: Data Backup

    The default location for user data is under the follow directory: …Documents\Thunder Scientific\ Note The user has full control as to where to save data and the above directory may not be the location they choose. Model 3920 System Manual – Document #OM3920 - Edition 2.1 May 2025...

  • Page 298: System

    12.1.1 Control Computer The Model 3920 leverages a NI cDAQ-9174 chassis (DAQ), and dedicated application running on the HMI computer to control the humidity generation process. 12.1.1.1 NI 9216 24-Bit, 100 Ohm RTD Analog Input Module The NI 9216 resistance temperature detector (RTD) analog input module features eight channels and 24 bits of resolution for PT100 Ω...

  • Page 299: Controlog® Software

    The HMI computer runs the ControLog and HumiCalc with Uncertainty software applications. 12.1.3 ControLog® Software ControLog is an embedded software application that fully automates the operation of the Model 3920 Low Humidity Generation System and allows various device connections through several different interfaces.

  • Page 300: Humicalc With Uncertainty Software

    HumiCalc with Uncertainty. This does not stop at calculations as HumiCalc with Uncertainty has the ability to calculate complex humidity uncertainties with ease. This allows the software to calculate real-time uncertainty for the 3920 Humidity Generation System. Key features of the HumiCalc with Uncertainty software are: Highly accurate formulas that replace charts and tables: •...
  • Page 301 The Refrigeration Compressor (C2) is connected to AC power through SSR-AC2. 12.2.1.11 Fluid Circulation Pump The Fluid Pump (FP1) is powered by +24 Vdc. The speed control signal is connected to +5 Vdc power through SSR-DC8. Model 3920 System Manual – Document #OM3920 - Edition 2.1 May 2025...

  • Page 302: Pneumatic System

    NEUMATIC YSTEM The pneumatic system of the Model 3920 is designed as an open loop two-pressure system. Gaseous nitrogen enters the generating system at the gas inlet and is admitted through the line filter (LF1) to the pressure regulator (REG). Supply pressure is regulated to 250 psiG or less as measured by the supply pressure transducer (T3).

  • Page 303: Saturator

    Test pressure (T2) is normally ambient barometric pressure. Manual control of test pressure can be performed by using a back-pressure regulator at the exit of the device under test. Model 3920 System Manual – Document #OM3920 - Edition 2.1 May 2025...

  • Page 304: Saturator Fluid System

    12.4.4 Fluid Flow Pressure Switch The fluid flow pressure switch (FS1) is used to indicate that the circulation pump is running, and that the thermal transfer fluid is circulating within the system. Model 3920 System Manual – Document #OM3920 - Edition 2.1 May 2025...

  • Page 305: Maintenance

    13 M AINTENANCE The Model 3920 Low Humidity Generation System requires only periodic maintenance. Following the proper operating procedures as given in this manual will help assure trouble-free operation of this system. CAUTION! ALWAYS USE THE FILE>TURN OFF COMMAND TO PROPERLY EXIT THE SOFTWARE AND SHUTDOWN THE COMPUTERS SO THAT THE MAIN POWER SWITCH CAN BE SWITCHED OFF.
  • Page 306 4. Using a Phillips screwdriver loosen the retainer screw from fluid flow pressure switch and remove the electrical connector. 5. Remove the connector nut in the middle of the switch to gain access to the adjuster. Model 3920 System Manual – Document #OM3920 - Edition 2.1 May 2025...
  • Page 307 6. Place voltmeter probes on pin 1 and pin 3 of the switch. 7. Switch voltmeter to continuity check. Model 3920 System Manual – Document #OM3920 - Edition 2.1 May 2025...
  • Page 308 10. Replace electrical connector and tighten retainer screw. 11. To test the switch operation, access the Water Capacity and Clear-Cycle dialog by selecting Water Capacity from the Generator Utilities menu. Model 3920 System Manual – Document #OM3920 - Edition 2.1 May 2025...
  • Page 309 13. Press the red square or “Pump Flow Switch” text to start the fluid pump test. The pump will run for 30 seconds. 14. Assure that during the 30 second test the Pump Flow Switch indicates Green. Model 3920 System Manual – Document #OM3920 - Edition 2.1 May 2025...

  • Page 310: Warning And Error Messages

    Catastrophic errors will result in an automatic shutdown. While it is not necessary to understand the error message, it is important to write down the error message exactly as it appears when contacting Thunder Scientific for technical support. 13.4.1 Saturation Temperature at Minimum Limit This error indicates the saturation temperature probe (RTD1) is reading below its minimum value for a specific amount of time.

  • Page 311: Test Temperature Over Range Or At Maximum Limit

    This error indicates the saturation pressure transducer (T1) is not responding to commands from the computer. A failed transducer is the most common cause of this error, but a disconnected or damaged serial cable or serial adapter could also be the cause. Model 3920 System Manual – Document #OM3920 - Edition 2.1 May 2025...

  • Page 312: Test Pressure At Minimum Limit

    A refrigeration leak or failure is the most common cause of this error. Other causes are a failed timer relay (TR5), failed +5 VDC power supply (DC3), or a failed transducer (T5). Model 3920 System Manual – Document #OM3920 - Edition 2.1 May 2025...

  • Page 313: Refrigeration Compressor C1 Low Side Pressure Over Range Or At Maximum Limit

    It is important to relay the number displayed after this error when contacting Thunder Scientific for technical support. Model 3920 System Manual – Document #OM3920 - Edition 2.1...

  • Page 314: Flow Valve Failed To Find Home Position

    This error indicates no coolant flow was detected (FS1) within the fluid circulation system. Make sure the fluid system has been filled with methanol. Other causes include a failed fluid pump, or the solid- state relay (SSR-DC8) has failed. Model 3920 System Manual – Document #OM3920 - Edition 2.1 May 2025...

  • Page 315: No Saturation Fluid Heat

    If this warning does not clear once the system has stabilized at its temperature setpoint then check the supply pressure as it might be insufficient for the desired humidity setpoint. Model 3920 System Manual – Document #OM3920 - Edition 2.1 May 2025...

  • Page 316: Drawings And Diagrams

    RAWINGS AND IAGRAMS This section contains drawings and diagrams of the Model 3920 Low Humidity generator to assist the user in better understanding the operation and location of components of the system. Note – All drawings and diagrams contained within this manual are proprietary information which are protected by copyright.
  • Page 317 DO NOT SCALE PROPRIETARY NOTICE THIRD ANGLE PROJECTION FROM DRAWING THIS DRAWING AND INFORMATION CONTAINED 623 Wyoming S.E. Albuquerque, NM 87123 WITHIN IS PROPRIETARY TO THUNDER SCIENTIFIC AND CANNOT BE COPIED OR REPRODUCED WITHOUT SPECIFIC WRITTEN PERMISSION 3920 Components TOLERANCES FURRY 9/26/2019...
  • Page 318 PROPRIETARY NOTICE THIRD ANGLE PROJECTION FROM DRAWING THIS DRAWING AND INFORMATION CONTAINED 623 Wyoming S.E. Albuquerque, NM 87123 WITHIN IS PROPRIETARY TO THUNDER SCIENTIFIC AND CANNOT BE COPIED OR REPRODUCED WITHOUT SPECIFIC WRITTEN PERMISSION 3920 Exterior Views TOLERANCES FURRY 9/26/2019...

  • Page 319: 19D3920901-3 - Left & Front Views

    PROPRIETARY NOTICE THIRD ANGLE PROJECTION FROM DRAWING THIS DRAWING AND INFORMATION CONTAINED 623 Wyoming S.E. Albuquerque, NM 87123 WITHIN IS PROPRIETARY TO THUNDER SCIENTIFIC AND CANNOT BE COPIED OR REPRODUCED WITHOUT SPECIFIC WRITTEN PERMISSION 3920 Left & Front Views TOLERANCES FURRY...
  • Page 320 THIRD ANGLE PROJECTION FROM DRAWING SOL6 THIS DRAWING AND INFORMATION CONTAINED 623 Wyoming S.E. Albuquerque, NM 87123 WITHIN IS PROPRIETARY TO THUNDER SCIENTIFIC AND CANNOT BE COPIED OR REPRODUCED WITHOUT SPECIFIC WRITTEN PERMISSION 3920 Right & Rear Views DETAIL "A" TOLERANCES...
  • Page 321 PROPRIETARY NOTICE THIRD ANGLE PROJECTION FROM DRAWING THIS DRAWING AND INFORMATION CONTAINED 623 Wyoming S.E. Albuquerque, NM 87123 WITHIN IS PROPRIETARY TO THUNDER SCIENTIFIC AND CANNOT BE COPIED OR REPRODUCED WITHOUT SPECIFIC WRITTEN PERMISSION 3920 Top View TOLERANCES FURRY 9/26/2019...
  • Page 322 PROPRIETARY NOTICE THIRD ANGLE PROJECTION FROM DRAWING THIS DRAWING AND INFORMATION CONTAINED 623 Wyoming S.E. Albuquerque, NM 87123 WITHIN IS PROPRIETARY TO THUNDER SCIENTIFIC AND CANNOT BE COPIED OR REPRODUCED WITHOUT SPECIFIC WRITTEN PERMISSION 3920 Pneumatic Components TOLERANCES FURRY 9/26/2019...

  • Page 323: 19D3920901-7 - Refrigeration Components

    PROPRIETARY NOTICE THIRD ANGLE PROJECTION FROM DRAWING THIS DRAWING AND INFORMATION CONTAINED 623 Wyoming S.E. Albuquerque, NM 87123 WITHIN IS PROPRIETARY TO THUNDER SCIENTIFIC AND CANNOT BE COPIED OR REPRODUCED WITHOUT SPECIFIC WRITTEN PERMISSION 3920 Refrigeration Components TOLERANCES FURRY 9/26/2019...
  • Page 324 PROPRIETARY NOTICE THIRD ANGLE PROJECTION FROM DRAWING THIS DRAWING AND INFORMATION CONTAINED 623 Wyoming S.E. Albuquerque, NM 87123 WITHIN IS PROPRIETARY TO THUNDER SCIENTIFIC AND CANNOT BE COPIED OR REPRODUCED WITHOUT SPECIFIC WRITTEN PERMISSION 3920 Electrical Components TOLERANCES FURRY 9/26/2019...
  • Page 325 PROPRIETARY NOTICE THIRD ANGLE PROJECTION FROM DRAWING THIS DRAWING AND INFORMATION CONTAINED 623 Wyoming S.E. Albuquerque, NM 87123 WITHIN IS PROPRIETARY TO THUNDER SCIENTIFIC AND CANNOT BE COPIED OR REPRODUCED WITHOUT SPECIFIC WRITTEN PERMISSION 3920 Data Acq. Components TOLERANCES FURRY...
  • Page 326 FROM DRAWING THIS DRAWING AND INFORMATION CONTAINED 623 Wyoming S.E. Albuquerque, NM 87123 TB2 - 34,35 +24 VDC WITHIN IS PROPRIETARY TO THUNDER SCIENTIFIC AND CANNOT BE COPIED OR REPRODUCED WITHOUT TB2 - 36 +15 VDC SPECIFIC WRITTEN PERMISSION AC / DC Power Distribution...

  • Page 327: 19S3920912 - Ni-9216 Rtd Module

    PROPRIETARY NOTICE THIRD ANGLE PROJECTION FROM DRAWING THIS DRAWING AND INFORMATION CONTAINED 623 Wyoming S.E. Albuquerque, NM 87123 WITHIN IS PROPRIETARY TO THUNDER SCIENTIFIC AND CANNOT BE COPIED OR REPRODUCED WITHOUT SPECIFIC WRITTEN PERMISSION NI-9216 RTD Module TOLERANCES FURRY 07/25/2019...

  • Page 328: 19S3920913 - Pres Tran/Stepper Drive Schematic

    FROM DRAWING THIS DRAWING AND INFORMATION CONTAINED TB2 - 27-30 +5 VDC 623 Wyoming S.E. Albuquerque, NM 87123 WITHIN IS PROPRIETARY TO THUNDER SCIENTIFIC TB2 - 31-33 +12 VDC AND CANNOT BE COPIED OR REPRODUCED WITHOUT SPECIFIC WRITTEN PERMISSION Pres Tran/Stepper Drive Schematic...

  • Page 329: 19S3920914 - Ni-9209 Analog Input Module

    P20 - P25 ARE STRAPPED TO P28 PROJECTION FROM DRAWING THIS DRAWING AND INFORMATION CONTAINED 623 Wyoming S.E. Albuquerque, NM 87123 WITHIN IS PROPRIETARY TO THUNDER SCIENTIFIC TB2 - 27-30 +5 VDC AND CANNOT BE COPIED OR REPRODUCED WITHOUT SPECIFIC WRITTEN PERMISSION...
  • Page 330 THIRD ANGLE PROJECTION FROM DRAWING THIS DRAWING AND INFORMATION CONTAINED 623 Wyoming S.E. Albuquerque, NM 87123 WITHIN IS PROPRIETARY TO THUNDER SCIENTIFIC TB2 - 27-30 +5 VDC AND CANNOT BE COPIED OR REPRODUCED WITHOUT SPECIFIC WRITTEN PERMISSION NI-9403 Digital I/O Module...

  • Page 331: 19S3920915-1 - Ni-9403 Digital I/O Module

    THIRD ANGLE PROJECTION FROM DRAWING THIS DRAWING AND INFORMATION CONTAINED 623 Wyoming S.E. Albuquerque, NM 87123 WITHIN IS PROPRIETARY TO THUNDER SCIENTIFIC TB1 - 4-9 L1 (208/240 VAC) AND CANNOT BE COPIED OR REPRODUCED WITHOUT SPECIFIC WRITTEN PERMISSION TB1 - 10-15...
  • Page 332 FROM DRAWING THIS DRAWING AND INFORMATION CONTAINED TB1 - 10-15 L2 (NEUTRAL) 623 Wyoming S.E. Albuquerque, NM 87123 WITHIN IS PROPRIETARY TO THUNDER SCIENTIFIC TB2 - 27-30 +5 VDC AND CANNOT BE COPIED OR REPRODUCED WITHOUT SPECIFIC WRITTEN PERMISSION TB2 - 34,35...
  • Page 333 PROPRIETARY NOTICE THIRD ANGLE PROJECTION FROM DRAWING THIS DRAWING AND INFORMATION CONTAINED 623 Wyoming S.E. Albuquerque, NM 87123 WITHIN IS PROPRIETARY TO THUNDER SCIENTIFIC AND CANNOT BE COPIED OR REPRODUCED WITHOUT SPECIFIC WRITTEN PERMISSION Saturator Refrig. & Fluid Flow TOLERANCES FURRY...

  • Page 334: Generate Mode

    DO NOT SCALE PROPRIETARY NOTICE THIRD ANGLE PROJECTION FROM DRAWING THIS DRAWING AND INFORMATION CONTAINED 623 Wyoming S.E. Albuquerque, NM 87123 WITHIN IS PROPRIETARY TO THUNDER SCIENTIFIC AND CANNOT BE COPIED OR REPRODUCED WITHOUT SPECIFIC WRITTEN PERMISSION Pneumatic System TOLERANCES FURRY 07/25/2019...

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    DO NOT SCALE PROPRIETARY NOTICE THIRD ANGLE PROJECTION FROM DRAWING THIS DRAWING AND INFORMATION CONTAINED 623 Wyoming S.E. Albuquerque, NM 87123 WITHIN IS PROPRIETARY TO THUNDER SCIENTIFIC AND CANNOT BE COPIED OR REPRODUCED WITHOUT SPECIFIC WRITTEN PERMISSION Pneumatic System TOLERANCES FURRY 07/25/2019...
  • Page 336 DO NOT SCALE PROPRIETARY NOTICE THIRD ANGLE PROJECTION FROM DRAWING THIS DRAWING AND INFORMATION CONTAINED 623 Wyoming S.E. Albuquerque, NM 87123 WITHIN IS PROPRIETARY TO THUNDER SCIENTIFIC AND CANNOT BE COPIED OR REPRODUCED WITHOUT SPECIFIC WRITTEN PERMISSION Pneumatic System TOLERANCES FURRY 07/25/2019...
  • Page 337 MODEL 3920 PROJECTION FROM DRAWING THIS DRAWING AND INFORMATION CONTAINED 623 Wyoming S.E. Albuquerque, NM 87123 LOW HUMIDITY WITHIN IS PROPRIETARY TO THUNDER SCIENTIFIC AND CANNOT BE COPIED OR REPRODUCED WITHOUT GENERATOR SPECIFIC WRITTEN PERMISSION Methanol Fill Level Drawing TOLERANCES...

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