Servomex NanoTrace DF-749 Operator's Manual
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Servomex NanoTrace DF-749 Operator's Manual

Moisture analyzer
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NanoTrace
Moisture Analyzer
DF-749
OPERATOR MANUAL

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Summary of Contents for Servomex NanoTrace DF-749

  • Page 1 NanoTrace Moisture Analyzer DF-749 OPERATOR MANUAL...
  • Page 2 No part of this publication may be reproduced, stored in a retrieval system or transmitted in any form, or by any means including electronic, mechanical, photocopying, recording or otherwise without prior written permission of Servomex Corporation. NanoTrace Moisture AnalyzerÔ is a trademark of Servomex Corporation. VCRâ is a registered trademark of the Cajon Company.
  • Page 3 ISO-9001 controls, thus helping to insure the highest possible standards of quality. Every analyzer that Servomex manufactures is tested and operated on a variety of gas concentrations to insure that it functions properly when you receive it. The certificate of calibration assures your analyzer has been calibrated on gases that are traceable to NIST standards.
  • Page 5 Follow the procedure below to unpack your NanoTrace Moisture Analyzer 1. Examine the condition of the packaging and its contents. If any damage is apparent, immediately notify the carrier and Servomex. Do not proceed with the installation. 2. Check the contents against the packing slip to make sure the shipment is complete.
  • Page 6 You should expect every Servomex analyzer to arrive in perfect working order and, with good maintenance, provide years of trouble- free service. Please call your nearest Servomex Business Center if you need assistance.

  • Page 7: Table Of Contents

    1 Table of Contents Table of Contents ..............1 Table of Figures ...................... 3 Cautions..................7 Symbols and Explanations ..................7 Important Warnings ....................7 Specifications ................9 Moisture ......................... 9 General........................9 Installation, Start Up and Shut Down ........13 Analyzer Installation ....................
  • Page 8 7.4.3 Calibrate Menu ..................38 7.4.4 Data History Routine ................42 7.4.5 Data Downloader Routine ................ 44 7.4.6 View Logs Menu ..................46 7.4.7 Analyzer Setup ..................49 7.4.8 Analog Output Setup ................55 7.4.9 Graph Setup .................... 56 7.4.10 Diagnostics Menu ................

  • Page 9: Table Of Figures

    1.1 Table of Figures Figure 1: Overall View without Isolation Panel ..................11 Figure 2: Overall View With Isolation Panel ..................... 12 Figure 3: Major Internal Components ......................13 Figure 4: Aspirator Installation ......................... 14 Figure 5: Rear Gas Connections ........................ 16 Figure 6: Rear Gas Connections and Controls with Optional Gas Panel .............
  • Page 10 Figure 49: Fan Failure Alarm ........................50 Figure 50: Alarm Setup Menu ........................51 Figure 51: Alarm Setup Screen ......................... 52 Figure 52: Temperature Alarm Setup ......................53 Figure 53: Pressure Alarm Setup ....................... 53 Figure 54: System Alarm Setup ......................... 54 Figure 55: Analog Output Setup Menu ......................
  • Page 11 Table of Tables Table 1: Recommended Sample Outlet Vacuum Pressure ................21 Table 2: Pin-out of Serial Comm Connector J5 ..................32 Table 3: Serial Communications Connections ................... 32 Table 4: Pin-Out of Moisture Signal Output Connector J4 ................. 32 Table 5: Pin-Out of Relay Connectors J8 and J9 ..................

  • Page 13: Cautions

    The analyzer must be operated in a manner specified in this manual. Servomex cannot be responsible for direct or consequential damages that result from installing or operating the analyzer in a manner not described in this manual.
  • Page 14 CAUTION Do not setup or operate this analyzer without a complete understanding of the instructions in this manual. Do not connect this Analyzer to a power source until all signal and plumbing connections are made. CAUTION This analyzer must be operated in a manner consistent with its intended use and as specified in this manual.

  • Page 15: Specifications

    3 Specifications 3.1 Moisture Lowest Detection Level (LDL): 400 ppt @ Constant Conditions Resolution: Analytical (Smallest Detectable Change): 200 ppt Display: 10 ppt Accuracy: Greater of ±3% of reading or ±0.4 ppb @ Constant Conditions Speed of Response: Typically <3 minutes to reach 90 percent of an upward step change Upset Recovery Time: Typically less than 5 minutes from a high ppb upset to within 10 ppb of the previously stable reading.
  • Page 16 Pneumatic Pressure (if equipped with isolation gas panel): 60-100 psig EMI Sensitivity: Tested to standards EN61000-3-3 and EN61326-1 Audible/Visual Alarm Status Indicators: Four Moisture levels, Temperature, Moisture cell Diagnostic, Zero Verification or Calibration in Process, Moisture Analyzer off-line, Analog output freeze during calibration. Alarm Relays: Four non-latching, independently assignable to moisture alarms or to moisture calibration-in-process indicator.
  • Page 17 Figure 1: Overall View without Isolation Panel Specifications DF-749...
  • Page 18 Figure 2: Overall View With Isolation Panel DF-749 Specifications...

  • Page 19: Installation, Start Up And Shut Down

    4 Installation, Start Up and Shut Down Installation of the analyzer requires the following steps be followed: · Connecting the N2/Air supply to the aspirator · Connecting an exhaust tube to the aspirator outlet, if needed · Connecting the pneumatic pressure service to the pneumatic inlet fitting ·...

  • Page 20: Analyzer Installation

    4.1 Analyzer Installation 4.1.1 Vacuum Source 4.1.1.1 Aspirator The standard vacuum source provided with the DF-749 analyzer is a factory installed aspirator as shown in Figure 4. Aspirator installation with the optional gas panel is identical. SAMPLE VENT ASPIRATOR 80 psi IN Figure 4: Aspirator Installation A regulated source of dry compressed gas (either N2 or air) is required at 80psi and a flow rate of approximately 15 slpm.

  • Page 21: Pneumatic Pressure Line Connection - Optional

    The aspirator needle valve should be opened (CCW) completely. Be sure to use a backup wrench when making all connections to the aspirator. 4.1.1.2 Vacuum Pump An optional vacuum pump can be purchased for those cases where there is insufficient gas pressure or flow to operate the aspirator, or when the analyzer is installed in a portable cart and connection to a continuous gas supply is inconvenient.
  • Page 22 System is included, the sample outlet line must be made of steel. See page 87 for additional information. See page 25 for information on the installation of the optional vacuum pump. RLY2-NC RLY4-NC RLY2-NO RLY4-NO RLY2-COM RLY4-COM NOT USED RLY1-NC RLY3-NC RLY1-NO RLY3-NO...

  • Page 23: Electrical Connections

    Figure 6: Rear Gas Connections and Controls with Optional Gas Panel 4.1.4 Electrical Connections Open the door and locate the power switch in the center of the upper rail. Be sure it is in the OFF position. Plug the line cord (supplied with 110VAC units only) into the receptacle at the back of the analyzer.
  • Page 24 RLY2-NC RLY4-NC RLY2-NO RLY4-NO RLY2-COM RLY4-COM NOT USED RLY1-NC RLY3-NC RLY1-NO RLY3-NO RLY1-COM RLY3-COM AOUT+ AOUT- 4-2 0mA+ 4-2 0mA- ISOLATION GAS PANEL SHOWN AC INLET Figure 8: AC Power Connections with Optional Gas Panel DF-749 Installation, Start Up and Shut Down...

  • Page 25: Analyzer Start Up

    Diagnostic Procedures while the various startup screens are displayed. Next, the Servomex logo is briefly displayed and then the data display appears with the Warming Up screen flashing. The warm up process takes approximately six to ninety minutes after which the display will look similar to Figure 9 (values shown are only representative).

  • Page 26: Gas Pressure And Flow Settings

    The moisture cell outlet will be connected to the supplied aspirator or, if equipped, to the vacuum pump. The sample inlet to the moisture analyzer, as well as the zero gas inlet, are heated to 60 C. This is done to mitigate any effects of adsorption-desorption of trace moisture on the walls of the tubing.

  • Page 27: Download System Data

    f. Confirm that the needle valve on the vacuum source (aspirator) is fully open (CCW). g. Turn on the vacuum source (aspirator) by applying gas to the high pressure inlet. See Figure 4. (Except when measuring in Helium background which is not run under vacuum but at ambient) 5.
  • Page 28 Additional long-term isolation security can be achieved by closing the valve on the rotameter on the rear of the instrument as well as completely closing the sample inlet regulator. If the analyzer is being disconnected from gas, be sure to tightly cap all gas connections. On analyzers that have no gas control valves: 1.
  • Page 29 FLOW METER MOISTURE SENSOR OUTLET (FRONT) ASPIRATOR WITH BUILT IN VACUUM CONTROL NEEDLE VALVE MOISTURE SAMPLE VENT REAR PANEL 80 psi IN TO CREATE VACUUM .010 ORIFICE REGULATOR ADJUSTMENT PROCESS INLET FLOWSWITCH BYPASS FLOWMETER (REAR) BYPASS FLOW ADJUST BYPASS OUTLET Figure 11: Block Diagram of Gas Flow Path with Optional Valves and Aspirator Installation, Start Up and Shut Down DF-749...

  • Page 31: Options

    5 Options The following options to the DF-749 are available at the time of order. 5.1 Key Lock An optional key lock can be installed in the door of the analyzer to prevent access to the power switch and other internal components. The lock is supplied with two keys. If the analyzer is operating, the key lock does not prevent adjustments from the front panel.

  • Page 32: Installation Of The Vacuum Pump

    breaker switch. The pump connection should be made directly to the Moisture Sample Outlet as described in section 5.6.2. TO MOISTURE SENSOR OUTLET PLASTIC TUBING SUPPLIED POWER CORD TO VACUUM PUMP POWER CONNECTOR Figure 12: Vacuum Pump Assembly 5.6.1 Installation of the Vacuum Pump ·...
  • Page 33 5.17 [131.32] 4.92 [124.97] 4.92 [124.97] Ø.28 [Ø7.14] 4 PL MOUNTING FOR 6.89 [175.01] 3.94 [100.08] BOTTOM OF BRACKET Ø.28 [Ø7.14] Ø.28[Ø7.14] 3.94 [100.08] 4 PL 4 PL 2 PL MOUNTING FOR LEFT OR MOUNTING FOR RIGHT SIDE OF BRACKET REAR OF BRACKET 3.94 [100.08] 2 PL...

  • Page 34: Moisture Sample Gas Outlet Connection To Vacuum Pump

    5.6.2 Moisture Sample Gas Outlet Connection to Vacuum Pump The sample gas outlet connection is a ¼ inch compression fitting labeled Moisture Sensor Outlet as shown in Figure 5 and Figure 6. Use the polyethylene tubing provided with the analyzer to connect between the outlet fitting and the ¼ inch fittings on the needle control valve and vacuum pump (included separately).
  • Page 35 FLOW METER (FRONT) REAR PANEL MOISTURE SENSOR OUTLET MOISTURE SAMPLE VENT EXTERNAL VACUUM PUMP (SUPPLIED LOOSE) VACUUM CONTROL NEEDLE VALVE (SUPPLIED LOOSE) .010 ORIFICE PROCESS INLET Figure 16: Block Diagram of Gas Flow Path and Optional Vacuum Pump FLOW METER (FRONT) MOISTURE SENSOR OUTLET MOISTURE...

  • Page 37: Connecting To External Devices

    6 Connecting to External Devices The analyzer can be interfaced to a variety of external devices via the ports on the rear panel. Alarm contacts, voltage, and current outputs, and serial communications are supported. All outputs, analog or digital, are fully isolated from earth ground. NOTE During the six minute warm up period all analog and digital outputs are held to an artificial 0.011ppb reading to avoid the reporting of...

  • Page 38: Analog Signal Outputs J4

    A program to facilitate serial communications is available from Delta F. Pin # Signal Description J5-8 Ground J5-7 4 wired 485 paired with TX+ J5-6 Unused J5-5 4 wire 485 paired with RX+ J5-4 Unused J5-3 Unused J5-2 Data transmitted by the analyzer via RS-232 or RS-485 J5-1 Data received by the analyzer via RS-232 or RS-485 Table 2: Pin-out of Serial Comm Connector J5...

  • Page 39: Relay Ports J8, J9

    The 4-20 mA analog output correlating to the front panel display reading is provided on the rear of the analyzer through connector J4. This output is electrically isolated from all other analyzer outputs, and from chassis (Earth) ground. The maximum load resistance for each is 1K Ohms and the analyzer provides a compliance voltage of approximately 28 VDC.

  • Page 41: User Interface

    7 User Interface 7.1 Data Display Screen The front panel display consists of the Graphical User Interface (GUI), as displayed on the view screen in Figure 19 below. Figure 19: Data Display Screen The various elements of the main data display screen are as follows: ·...

  • Page 42: Menu Structure

    Menu Next Enter Figure 20: Keypad The Menu key activates the menu structure along the top of the GUI interface on the view screen. Once in the menu, the arrow keys ( ) highlight the various menu features. When the desired selection is highlighted, the right arrow will access the submenu if available (denoted by a right arrow next to the menu text).

  • Page 43: Isolate Analyzer Optional

    The Main Menu is accessed by pressing the Menu key on the front panel. Use the arrow keys ( ) to navigate up and down through the list. Select the highlighted item with the Enter key on the front panel. If a menu item is grayed out as shown in Figure 22, then the option is not installed, and as a result the item is not available.

  • Page 44: Restore Sample Gas Flow Optional

    Figure 24: Isolate Warning While the moisture cell is isolated from gas flow, a warning will appear at the bottom of the main display indicating Isolated . 7.4.2 Restore Sample Gas Flow Optional Figure 25: Restore Sample Gas Flow This command allows the user to return the analyzer gas flow to normal after isolation. 7.4.3 Calibrate Menu Calibration of the moisture analyzer is somewhat of a misnomer.
  • Page 45 Figure 26: Calibrate Menu 7.4.3.1 Check/Adjust Zero Figure 27: Check/Adjust Zero Menu The Check/Adjust Zero screen displays many pieces of information including a live reading of moisture in ppb (or ppm) and the state of the zero gas control valves. Also depicted are Zero Reference and Zero Offset values.
  • Page 46 A relay is available on the Analog Output Setup Screen (see page 55) to signal that a zero calibration is taking place, and the analog output signal can also be frozen or allowed to update during the calibration process. Figure 28: Check/Adjust Zero Screen 7.4.3.1.1 User Zero Offset Figure 29: User Zero Offset The User Zero Offset function enables the user to add a given moisture ppb value to the...
  • Page 47 back and change the value or move to the Done button, followed by hitting the Enter key to leave the screen. Using the ESC key at any time will exit the screen making no changes and return to the main display. 7.4.3.1.2 Do A Manual Zero Figure 30: Manual Zero Screen The manual zero command enables the user to zero the moisture cell in an interactive...

  • Page 48: Data History Routine

    7.4.4 Data History Routine Figure 31: Data History Menu The Data History Screen (Figure 32) enables the user to see the data history displayed in strip chart form on the front display. By default, the data history screen displays data for the most recent 24 hour period sampled at 1 point per minute (fixed) and the y-axis is auto- scaling.
  • Page 49 Figure 32: Data History Screen Figure 33: Install Media Firmware version 0.6.1 Serial # ND-10016 Model # DF-749 Start time 05-01-2003 03:07 PM End time 05-22-2003 03:07 PM Date Time 5/16/03 1:24 PM 5.423 5/16/03 1:25 PM 5.423 5/16/03 1:26 PM 5.421 5/16/03 1:27 PM...

  • Page 50: Data Downloader Routine

    7.4.5 Data Downloader Routine Figure 35: Data Downloader Menu The Moisture Data Downloader screen, Figure 36, enables the user to label data with unique location names as well as to view and download specified data. The Next key is used to toggle through the various options on the screen and the arrow ) move up and down through the location list.
  • Page 51 7.4.5.2 View Location Figure 37: View Location Screen The view location function is used to view data previously stored in the system sorted by location. On the Moisture Data Downloader screen Figure 36, use the Next key to move to ) to select the location the list of existing names and then use the arrow keys ( desired.

  • Page 52: View Logs Menu

    ) to navigate the keyboard and use the Enter key to accept Use the arrow keys ( each character. If an error is made use the Next key to move to the Clear Entry key and hit enter. When the location name is complete use the Next key to move the highlight to Accept New Location and hit Enter.
  • Page 53 the event of an Automatic Zero, if it were scheduled. The time to perform the zero and the resulting zero reference are also noted. Figure 41: Zero Log Screen 7.4.6.2 System Error Code Log Figure 42: View System Error Code Log Menu The System Error Log reports functional errors in the moisture system.
  • Page 54 Contact Delta F for assistance in interpreting the various codes if one should appear on the screen. Figure 43: System Error Code Screen 7.4.6.3 Pump Capacity Test Log Figure 44: Pump Capacity Test Log Menu The pump capacity test is used to determine the condition of the aspirator or vacuum pump which in turn will have a direct impact the flow of gas through the analyzer.

  • Page 55: Analyzer Setup

    Figure 45: Pump Capacity Test Log 7.4.7 Analyzer Setup The analyzer setup menu allows the user access to the Gas Scale Factor settings, Alarm Setups, Analog Output setup and Graph setup. ) to scroll up and down through the list. Pressing ESC will Use the arrow keys ( return to the main display.
  • Page 56 ) to Use the Next key to move from between fields and use the arrow keys ( change the highlighted selections and to enter numerical values. When done, use the Next key to move to the Accept button and hit the Enter key to return to the main display. Using the ESC at anytime will exit the screen making no changes and return to the main display.

  • Page 57: Table 6: Alarm Codes

    In addition, if hydrogen is entered as a gas in the GSF Setup, and the system detects a failure in the exhaust fan circuitry the entire analyzer will automatically isolate. A message of Fan Failure as shown in Figure 49 will flash over the moisture reading on the main display and the user will be unable to restore any flow until the fan problem has been fixed.
  • Page 58 An alarm warning will overwrite the moisture level readout if an alarm condition exists. To acknowledge the alarm simply hit the Enter button and its number or letter will appear in the Alarm Status line above the display. See Figure 19. This action will not clear the alarm. Only restoration of the condition that existed prior to the alarm will clear the alarm.
  • Page 59 7.4.7.5 Temperature Range Alarm Setup Figure 52: Temperature Alarm Setup The system is constantly monitoring the ambient temperature in the analyzer cabinet. If enabled on the Temperature Alarm Setup screen, an alarm can be assigned to trip if the ambient temperature exceeds preset limits. The user may assign the temperature alarm to one of four relays.
  • Page 60 to trip if the pressure exceeds preset limits. The user may assign the pressure alarm to one of four relays. The limits are not user adjustable but are set automatically on the basis of the background gases entered in the GSF screen. See page 49 for additional information on setting the background gases.

  • Page 61: Analog Output Setup

    7.4.8 Analog Output Setup Figure 55: Analog Output Setup Menu The Zero Point corresponds to the lowest voltage or current output (0 VDC, 4 mA) that is sent to a recorder, while the Full Scale corresponds to the maximum voltage or current output (1/5/10 VDC or 20mA) that is sent.

  • Page 62: Graph Setup

    The In Calibration Relay can be enabled to signal that a zero calibration is in process. In addition, the user has the option to freeze the analog output or enable the analog output to update as the calibration progresses. 7.4.9 Graph Setup Figure 57: Graph Setup Menu The graph setup is used to adjust the time scale on the main data display of the analyzer.
  • Page 63 7.4.10.1 Active Zero On/Off Figure 59: Active Zero On/Off Menu The Active Zero Offset feature is designed to automatically compensate for the analyzer s gradual zero baseline cleanup. This gradual cleanup is natural and occurs after a fresh startup or after a prolonged or abnormally high moisture exposure. This feature ensures that accurate low ppb H O readings can be made as soon as possible after initial startup, or after a high H...
  • Page 64 If the Active Zero Offset feature is turned off, the User Zero Offset value will appear in its place in the Check/Adjust Zero menu. The previous user Zero Offset value (if any) will reappear and immediately be applied to the live display readings. Likewise, if the Active Zero Offset feature is on, then its value (if any) will appear and immediately be applied to the live readings.
  • Page 65 7.4.10.3 Test Analog Voltage Output Figure 62: Test Analog Outputs Menu The Test Output screen, as shown in Figure 63, is used to calibrate the analog recorder output. When the Test Output screen is selected, the NEXT key is used to move to the percentage field where the arrow keys ( ) are used to choose the appropriate setting.
  • Page 66 7.4.10.4 Signal Monitor Figure 64: Signal Monitor Menu The Signal Monitor depicts 18 system parameters in numerical order. Each parameter is unique for each system. In the event of a system error, these parameters can be used as a diagnostic tool. See page 47 for additional information on system errors. Figure 65: Signal Monitor Screen 7.4.10.5 Pump Capacity Test...
  • Page 67 Figure 66: Pump Capacity Test Menu After the pump test is complete, an entry is automatically put in the pump capacity test log as shown in Figure 69. See page 48 for additional information on the pump test log. Figure 67: Pump Capacity Test Screen Figure 68: Pump Pressure Failure User Interface DF-749...

  • Page 68: Adjust Contrast

    Figure 69: Pump Capacity Test Log 7.4.11 Adjust Contrast Figure 70: Adjust Contrast Menu Figure 71: Adjust Display Contrast Screen On analyzers with a Monochrome display, this screen allows the user to modify the contrast of the front display screen. From the System menu, select Adjust Contrast. Use the up DF-749 User Interface...

  • Page 69: Power Up Default Optional

    and down arrows ( ) as indicated to make adjustments. Hit ESC on the key pad when done. 7.4.12 Power Up Default Optional Figure 72: Power Up Default Menu This menu item is only available on analyzers equipped with the isolation valve option. The Power Up Default SubRoutine allows the user to determine the various default states during analyzer power up.

  • Page 70: Date/Time

    before the error. This reboot action is identified in the system error log as an error 222. See page 47 for additional information on system error codes. 7.4.13 Date/Time Figure 74: Date/Time Menu The Date/Time Screen is used to set various calendar and clock related parameters. The Next key is used to moved from field to field, and the arrow keys ( ) are used to change the numerical digits and units.

  • Page 71: Communications

    USB memory stick, and the files can either be mailed or e-mailed to Servomex for evaluation. Install a memory stick into the external USB socket located behind the front door and on the left side of the analyzer. After hitting Enter from the Download System Data menu, Figure 79 will appear.
  • Page 72 Hit Enter and the download process will begin and a time bar will appear as in Figure 81. The process should only take a minute or two and when complete control will be returned to the user. Figure 78: Download System Data Menu Figure 79: Insert Media Figure 80: Media Warning If there is insufficient space available on the media a warning will appear as in Figure 80.

  • Page 73: System Info

    All files are then automatically compressed and loaded as one file on the memory stick, which then can be used to forward the information to Servomex for evaluation. 7.4.16 System Info...
  • Page 74 Figure 83: System Info Screen 7.4.16.1 Firmware Upgrade While the Firmware Upgrade box is highlighted, hitting the Next key will bring up the Firmware Upgrade dialog box as in Figure 84 below. Figure 84: Software Upgrade Screen Place the USB memory stick in the external USB socket located behind the front door, When ready hit the Yes, Proceed key and follow the instructions.

  • Page 75: Sample Gas Preparation And Delivery

    8 Sample Gas Preparation and Delivery 8.1 Introduction It is important to note key differences in each parameter to ensure a properly functioning system. Parameters such as flow, pressure, and background gas will have major effects on total system performance. 8.2 Sample Flow Rate and Pressure Proper moisture analyzer operation is dependant upon the pressure of the sample gas.

  • Page 76: Flammable Sample Gas

    such as Helium and Hydrogen whose flow rates should be set to approximately one-third that of Nitrogen. 8.5 Flammable Sample Gas There is nothing within the analyzer sample system that can ignite a flammable sample gas. However, it is critical to ensure that the sample gas does not escape from the sample system into the analyzer enclosure, or the room, where ignition is possible.

  • Page 77: Service

    A rebuild kit is available from Servomex to return the pump to original specifications. See the list on page 72 for cleaning fluid and rebuild kit part numbers.

  • Page 78: Replaceable Parts List

    9.3 Replaceable Parts List When ordering parts, please be certain to supply the model number and serial number of your analyzer. PART NO. PART DESCRIPTION Printed Circuit Boards 210867 Moisture Board 54000001 Front Display 210597 Linear Power Supply 211156 Switching Power Supply Hardware Items 210566 Aspirator...

  • Page 79: Troubleshooting The Df 749 Nanotrace Analyzer

    System Error Log (see page 47). In the event of a system alarm contact Servomex with information as displayed in the log as well as on the Signal Monitor screen as shown on page 60.

  • Page 81: Theory Of Operation

    10 Theory of Operation 10.1 The Moisture Measurement 10.1.1 Moisture and the IR Spectrum Figure 85: Schematic of Moisture Cell The Nanotrace Moisture analyzer uses infrared (IR) absorption as its detection method. IR absorption is but a subset of the overall field of spectroscopy, which measures the interaction of light and matter.

  • Page 82: Absorption Spectroscopy

    10.1.2 Absorption Spectroscopy The relationship that defines absorption spectroscopy is known as Beer s Law. Beer s Law equates, in rigorous terms, the concentration of any absorbing molecule based on absorbed light intensity at a particular wavelength, given knowledge of the molecule s absorption strength and the path length of the sample medium.

  • Page 83: Safety

    11 Safety 11.1 General Warnings DANGER Potentially hazardous AC voltages are present within this instrument. Leave all servicing to qualified personnel. Disconnect the AC power source when installing or removing: external connections, the sensor, the electronics, or when charging or draining electrolyte.

  • Page 85: Warranty

    12 Warranty Delta F Corporation warrants each instrument manufactured by them to be free from defects in material and workmanship at the F.O.B. point specified in the order, its liability under this warranty being limited to repairing or replacing, at the Seller's option, items which are returned to it prepaid within one year from delivery to the carrier and found, to the Seller's satisfaction, to have been so defective.

  • Page 87: Index

    13 Index Analog Signal Outputs, 32 Relay Ports, 33 Serial Communications, 31 4-20mA Outputs, 32 External Devices,Connecting to, 31 Active Zero On/Off, 57 Fan Failure, 50 Add Location, 45 Fan Failure Alarm, 51 Adjust Contrast, 62 Firmware Upgrade, 68 Alarm Setup, 51 Alarm Setup, Moisture, 52 Analog Output Setup, 55 Analog Signal Outputs, 32...
  • Page 88 Return Material Authorization number, 71 Shipping, 75 Operating Voltage, 25 Return Material Authorization number, 75 Options, 25 Set Location, 44 Signal Monitor, 60 Specifications, 9 System Alarm Setup, 54 Power Up Default, 63, 64 System Error Codes, 47 Pressure Alarm Setup, 53 System Info, 67 Pump Capacity Test, 60 Pump Capacity Test Log, 48...

  • Page 89: Appendix A User Menu Screens

    14 Appendix A User Menu Screens Page 37 Page 38 Page 39 Page 42 Page 44 Page 46 Page 47 Page 48 Appendix A User Menu Screens DF-749...
  • Page 90 Page 49 Page 51 Page 55 Page 56 Page 57 Page 58 Page 59 Page 60 Appendix A User Menu Screens...
  • Page 91 Page 60 Page 62 Page 63 Page 64 Page 65 Page 66 Page 67 Appendix A User Menu Screens DF-749...
  • Page 92 Appendix A User Menu Screens...

  • Page 93: Appendix B Hydrogen Service Safety System

    15 Appendix B Hydrogen Service Safety System The Hydrogen Service Safety System is designed to safeguard the DF-749 from explosion hazards when operating on hydrogen sample gas under normal pressure and flow conditions as described in this manual. The instrument chassis and the remote pump, if equipped, are both protected by maintaining a safe condition within their respective enclosures.

  • Page 94: Operation

    · The pump enclosure must be mounted to a nearby wall or inside the rack shared by the analyzer. See Figure 87 on page 92. · The sample gas inlet connection is made to an interlock valve mounted at the sample gas inlet on the rear of the analyzer.
  • Page 95 adequate pump cooling. The purge flow rate is set to 30 scfh as indicated on a rotometer mounted on the side of the pump enclosure. An in-line flow switch will trip at a flow rate of less than 26 scfh assuring adequate flow. Loss of purge flow breaks the contacts in the flow switch, which in turn trips a mercury relay that removes power to the pump.
  • Page 96 CAUTION The operator is obligated to assure proper operation of the analyzer air flow system as designed. Do not impede air flow at the inlet in the front door or at the exhaust fan outlets on either side of the cabinet in the rear.
  • Page 97 Figure 86: Hydrogen Service Safety System Appendix B Hydrogen Service Safety System DF-749...
  • Page 98 Figure 87: Pump Purge Option Appendix B Hydrogen Service Safety System...

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