RHS Dew Point Mirror 573 Operation And Maintenance Manual
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RHS Dew Point Mirror 573 Operation And Maintenance Manual

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Dew Point Mirror 573
Operation and
Maintenance Manual
V3.1

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Summary of Contents for RHS Dew Point Mirror 573

  • Page 1 Dew Point Mirror 573 Operation and Maintenance Manual V3.1...
  • Page 3 RHS. RHS will not be liable for any other claims or dam- ages, either direct, indirect, or consequential arising out of the use of its products.

  • Page 4: Table Of Contents

    Table of Contents WARRANTY ........ERROR! BOOKMARK NOT DEFINED. TABLE OF CONTENTS ................2 SAFETY INSTRUCTIONS................1 KEY FEATURES ..................3 QUICK START ..................5 Unpacking ..........................5 Mirror Cleaning ........................5 Starting the 573........................6 Humidity Measurement ......................7 Sample Gas Connections ....................8 GET TO KNOW THE 573 ...............
  • Page 5 5.4.1 Dew/Frost Control ......................32 5.4.2 Water Cooling ......................... 34 5.4.3 ORIS (573S only) ......................35 5.4.4 Mirror Cleaning (573S only) ................... 37 5.4.5 Mirror Check ........................37 5.4.6 Heating Control (573H / HX only) ................... 39 5.4.7 Pump Settings ........................ 40 Control Setup 2 ........................
  • Page 6 6.4.2 Inlet Filters ........................58 6.4.3 Sample Gas Flow ......................59 6.4.4 Temperature Measurement ................... 59 INSTALLATION ..................60 Facility Requirements ......................60 7.1.1 Environmental ........................ 60 7.1.2 Power ..........................60 7.1.3 Instrument Cooling ......................60 7.1.4 Heating of the Sampling System ................... 61 Preparation for Use ......................
  • Page 7 Calibration .......................... 76 Peltier Cooling Test ......................77 Periodic Maintenance Checks .................... 77 ERROR MESSAGES ................79 10.1 Heater Feedback Sensor Failure ..................79 SPECIFICATIONS ................81 DRAWINGS ..................83 FAQ’S ....................85 RH Systems 573 Manual English V0.9...

  • Page 9: Safety Instructions

    1 Safety Instructions IMPORTANT, please read the Safety Instructions carefully: • Check all connections carefully before use • Disconnect power supply before opening the instrument housing • In the event of damage do not use the instrument Depending on the operation, the following parts of the instrument may get very hot: •...
  • Page 10 RH Systems 573 Manual English V3.1...

  • Page 11: Key Features

    2 Key Features Precise and Stable Humidity Measurement The 573 Dew Point Mirror is a high performance 19” rack format instrument with an integral measuring head, pressure sensor, sample pump and flow meter for continuous precision measurement of frost/dew point, temperature, pressure and calculated humidity parameters in a wide range of applications. The humidity measurement of the 573 is based on the chilled mirror condensation technology which provides highly precise, stable and repeatable results.
  • Page 12 Ice Test Function Users can perform a check of the 573 system stability at any time using the built-in Ice Test function that provides instant verification of system accuracy and integrity. See chapter “Ice Test” page 46. Measuring Head and Sample Tube Heating - 573H and HX only When measuring high dew points, condensation will occur if any section of the sample path is at a temperature below the dew point temperature.

  • Page 13: Quick Start

    3 Quick Start This chapter guides you through the set-up and most important first steps when using the 573. It is a summary and should only be used as a general overview. Do not use it as a substitute for the remainder of the manual.

  • Page 14: Starting The 573

    3.3 Starting the 573 The 573 needs a source of AC power. It will work over a wide power range and will most likely operate at your local voltage and frequency. Check the back panel label for the power requirements for your specific instrument.

  • Page 15: Humidity Measurement

    3.4 Humidity Measurement When you switch on the 573 the default display will show the pressure in the measuring circuit. If a temperature probe is connected, an external temperature reading will also be displayed. Dew/frost point will also display the current mirror temperature, but not the actual dew/frost point. To measure humidity (dew point, frost point, RH, etc.), Dew/Frost Control must be started and gas should be flowing through the measuring head.

  • Page 16: Sample Gas Connections

    Start the measurement by pressing the Dew/Frost Control button. This but- ton enables the system to cool the mirror to the dew or frost point temperature, monitor the thickness of the condensation layer on the mirror, and precisely adjust the mirror temperature to maintain a stable condensation layer. When Dew/Frost Control is enabled, the indicator on the key will turn green and the dew or frost point temperature display will begin to show the mirror tempera- ture as it cools to the condensation point.
  • Page 17 The inlet and outlet connections are located on the back panel of the instrument and are clearly labeled as shown in the picture on the left. Connections are either 6mm or ¼ inch Swagelok (specified at the time of ordering). The back panel layout is different depending on the instrument version.
  • Page 18 RH Systems 573 Manual English V3.1...

  • Page 19: Get To Know The 573

    4 Get to know the 573 4.1 Front Panel The front panel of the 573 is equipped with a full color touch screen and a keypad for data entry. To activate a menu option or toggle a function on or off, simply touch the desired key or object directly on the screen.
  • Page 20 573HX Heated Measuring Head RH Systems 573 Manual English V3.1...

  • Page 21: Data Lines

    4.1.1 Data Lines The first three lines of the display show a numeric or graphic representation of the measured data. We will refer to these first three lines as Data Lines. If numeric, a data line contains the value to the left, with the parameter description and unit to the right.

  • Page 22: Fixed Function Keys

    Density The density indicator graphically depicts the approximate thickness of the dew or frost layer on the mirror surface. The 573 can automatically differentiate between dew and frost layers and the indicator will display the current condensation state. The label in the density indicator will change from Layer Density (when the state of the layer is uncertain) to either Dew Density or Frost Density (when either dew or frost is being measured).

  • Page 23: Menu Keys And Navigation

    4.1.4 Menu Keys and Navigation On the right hand side of the display there is a column of menu keys. The bottom, dark grey key changes the cur- rent menu by cycling to the next menu. Each of the light grey keys change their label and function based on the menu that is currently selected.

  • Page 24: Measuring Head

    4.3 Measuring Head The heart of the chilled mirror 573 is the measuring head. It is designed to be highly sensitive, accurate, robust and easily accessible for regular cleaning. Although cleaning the mirror is not necessary before the first use, you might want to familiarize yourself with the location and accessibility of the mirror and the other optical components.

  • Page 25: Optical Module

    4.3.2 Optical Module The Optical Module contains an LED light source and a photodiode light detector (opto-electronic com- ponents). This assembly is used to detect the formation and thickness of condensation on the mirror surface. In the event of damage or failure, the optical module can easily be repaired or replaced. This will have no effect on the calibration of the instrument.

  • Page 26: Back Panel

    4.4 Back Panel 573S 573H/HX Power Switch The main power switch is on the back panel above the power plug. The power supply has a built-in fuse and will automatically switch off in case of overload. To restart power, the main power switch must be switched off and on again.
  • Page 27 Optional Analog Outputs The 573 can be ordered with two optional analog outputs which are independently configurable. For each of the analog outputs, you can choose which parameter to transmit and scale its range. Please refer to chapter ‘Configuration of Optional Analog Outputs’ on page 44 to learn how to configure the analog outputs.
  • Page 28 Measuring Head Input/Output Inlet sample gas is connected directly to the measuring head. Inside the 573, there is the shortest pos- sible stainless steel connecting tube to the measuring head. On 573H and HX units, the internal gas inlet and outlet tubes are heated. The outlet from the measuring head returns to the back panel where the sample gas can be directly vented or connected to the flow meter and/or sample gas pump.
  • Page 29 Steam Trap’ on page 52. Gas Pump Input/Output The 573 is fitted as standard with an internal sample pump that can be used to flow sample gas through the measuring head where the application is at ambient pressure (for example sampling room or cham- ber conditions).
  • Page 30 Steam Trap’ on page 52. External Temperature Probe The external temperature socket on the back panel is used for the connection of an external temperature probe. External temperature measurements are required if certain humidity parameters, such as relative humidity (%rh) are calculated by the 573. External temperature measurements are not required for dew or frost point measurements.

  • Page 31: 19-Inch Rack

    Cooling Water Connection The 573 is equipped with an additional water cooling connection. This allows a flow of water to cool the measuring head to increase the mirror depression capability beyond the normal working limits of the Peltier thermoelectric cooler that regulates the mirror temperature. Water cooling can also be useful in applications where the ambient temperature is high and low frost/dew points are measured.
  • Page 32 RH Systems 573 Manual English V3.1...

  • Page 33: System Configuration

    5 System Configuration Many aspects of the 573 can be configured depending on your measuring needs and preferences. You can choose which humidity, temperature, and pressure values will be indicated on the screen, their order and units, and whether each will be shown as a number or as a graph. In addition to the display options, you can define how the 573 performs its control functions, such as Dew/Frost determination.
  • Page 34 6 - Units 2 This menu is used to select the units in which you would like the data to be displayed. Unit changes will be applied to all values displayed on the screen. This menu configures the units for absolute humidity, specific humidity and vapor pressure parameter. 7 - Foreground Color The menu Fore Color is used to temporarily change the color of the lines drawn on graphs and the color of text (numbers and letters).

  • Page 35: Selection Of Indicated Parameters

    5.2 Selection of Indicated Parameters In the Parameter menu you can choose which parameters you would like to have displayed on the data lines. When you select parameters for display on any of the four data lines, those selections remain valid until you change them again, even after you turn the 573 off.
  • Page 36 Follow the steps below to choose the parameters you wish to have displayed on the four data lines: 1. Select the Parameter menu by press- ing the dark gray menu selection key until Parameter appears. Small left pointing arrows will appear on the four upper menu keys.

  • Page 37: Selection Of Numeric Or Graphic Data Display

    5.3 Selection of Numeric or Graphic Data Display Any data line may be viewed either in a numeric or a graphic format. The 573 automatically keeps a short data history of every selectable parameter so that a graph appears instantly whenever a data line is switched from numerical to a graphic mode.
  • Page 38 Autoscale Minimum The Autoscale Minimum mode is the default setting for this instrument. This mode sets the scaling au- tomatically so that all of the stored data will be visible on the graph at the best possible resolution. As the range of the data changes, so will the range of the graph. In Autoscale Minimum mode, you can select the minimum range that you want the graph to scale to.
  • Page 39 The time span can be changed in the Numeric/Graphic menu: 1. Touch the graph you wish to change on the screen. The Graph Scaling dialog box will appear. 2. Touch the Change To: field next to Time Span. The field will turn white. 3.

  • Page 40: Control Setup 1

    5.4 Control Setup 1 The Control Setup 1 menus enable you to control the manner in which the 573 operates. 5.4.1 Dew/Frost Control To measure humidity (dew point, frost point, RH, etc.), Dew/Frost Control must be started and gas should be flowing through the measuring head. Force Frost Below When measuring dew/frost points between 0 °C and -20 °C, condensation on the instrument’s chilled mirror may be in the form of dew, frost, or a combination of both.
  • Page 41 Why it is Important to distinguish between Dew and Frost For mirror temperatures above 0 °C, water vapor always condenses on the mirror in its liquid phase (dew). A condensation layer on a mirror above 0 °C is therefore always considered a dew point.

  • Page 42: Water Cooling

    5.4.2 Water Cooling All 573 instruments are equipped with a water cooling function. This allows the connection and control of water flow through the measuring head so that mirror cooling capability can be increased, and lower dew/frost points can be measured. To change the Water Cooling settings: 1.

  • Page 43: Oris (573S Only)

    5.4.3 ORIS (573S only) At low frost point conditions, the time to stabilize a condensate layer can be significant, sometimes as long as two hours for correct equilibrium. The ORIS (Optimal Response Injection System) speeds up the measurement of low humidity, typically when the gas is drier than about -40 °C frost point. ORIS reduces the stabilization time using a carefully programmed vapor injection procedure that accelerates the formation of a frost layer and then interfaces with the mirror control system to maintain stability.
  • Page 44 The following graph shows how ORIS helps decrease the time needed for the system to stabilze when measuring low humidity: RH Systems 573 Manual English V3.1...

  • Page 45: Mirror Cleaning (573S Only)

    5.4.4 Mirror Cleaning (573S only) Activating the Mirror Cleaning function with the respective key at the bottom of the screen will heat the mirror to a pre-specified temperature, preparing the measuring head ready for the removal of the cover and the optical module. If the mirror and other internal measuring head components are disassembled while they are cold and become exposed to normal atmospheric air, the possibility of undesired con- densation exists.
  • Page 46 Once the system has re-established a dew or frost layer and become stable, the mirror check function is completed and the color indicator turns gray. After the Mirror Check is completed the bar of the Mirror Residue Indicator shows the amount of con- tamination remaining on the mirror.

  • Page 47: Heating Control (573H / Hx Only)

    5.4.6 Heating Control (573H / HX only) For the purpose of measuring high dew points, the 573H and HX are equipped with heating of the measuring head and the internal measuring head inlet/outlet sample tubes. There is also provision for the connection and control of one external heated sample hose to connect between the 573H or HX and the device under test.

  • Page 48: Pump Settings

    While it may not be evident from front panel indications, all systems automatically control the head temperature to maintain it at or above 20 °C regardless of the status of the heater con- trols. This is done to prevent the head from cooling to a value that might allow condensation to form on the external head components such as the screw cover or optical head.

  • Page 49: Control Setup 2

    5.5 Control Setup 2 5.5.1 Steam Trap Configuration This function configures the control of a valve to drain the RHS steam trap or a user’s own cold trap system. To change the Steam Trap settings: 1. Select the Control Setup 2 menu by pressing the dark gray menu selection key until Control Setup 2 appears.
  • Page 50 Steam Trap’ on page 52 for more information. RH Systems 573 Manual English V3.1...

  • Page 51: Selection Of Units

    5.6 Selection of Units You can display system data in any of a wide variety of units. When you change units, your selection will remain until you change it again. Unit selections are global, which means that all values of that parameter type across the whole system will change to the chosen units.

  • Page 52: Selection Of Color

    5.7 Selection of Color The foreground and/or background color of any data line can be changed in the Fore Color and Back Color menus. Access the Fore Color and Back Color menus with the menu selection key. To revert to the default color scheme, press and hold key number 9 on the keypad for a few seconds until the instru- ment beeps.

  • Page 53: Configuration Of Optional Analog Outputs

    5.8 Configuration of Optional Analog Outputs For each of the analog outputs, you may select which parameter to track and how to scale the selected parameter to the analog output range. These selections are made for each of the analog outputs via the Analog Outputs menu.
  • Page 54 External Temperature [°C] Head Temperature [°C] Scaling the Output Signal Use Min Value and Max Value to set the range of the Parameter, and use Min Voltage and Max Voltage to set the range of the analog output signal. Example 1 1.

  • Page 55: Diagnostic Functions

    5.9 Diagnostic Functions 5.9.1 System Information When you press the System Info button in the Diagnostic Functions Menu a window appears which gives you infor- mation about the model of the instrument, the version of the software and the serial number of the instrument. 5.9.2 Ice Test Measurement accuracy can be checked with a simple built-in test.
  • Page 56 Press the Ice Test menu key. A window requests you to open the measuring head. Disassemble the measuring head as explained in chapter 9.2 ‘Mirror Cleaning’ on page 72. Confirm that you opened the measuring head and are ready for the Ice Test by pressing the Ok button. The test starts immediately after pressing the Ok but- ton.

  • Page 57: Peltier Cooling Test

    If the measured ice-melt temperature was outside the range of ± 0.2 °C, the check was not successful and indicated with the calibration status FAIL. In this case, clean the mirror and repeat the ice test. If it continues to fail, the instrument should be sent to the manufacturer or an authorized agent for evalu- ation and/or repair.

  • Page 58: Rs-232 Configuration

    Cool index: Calculates a speed index for the first 40 °C of cooling (kelvin per sec- ond) Max Delta: Maximum delta between head and mirror temperature during test Min TM: Lowest mirror temperature reached during test TH: Head temperature at the end of the test Following results indicate a successful test: Cool index: Should be higher than 1 °K/s Max Delta: The reached Delta should be higher than 80 °C, at laboratory conditions of about...

  • Page 59: Set Up And Operation

    6 Set Up and Operation 6.1 Measurement Set Up Since each version of the 573 is suitable for a specific dew/frost point range, it is important to have a basic knowledge of the value to be measured to ensure that the correct instrument is being used. In addition to the correct instrument selection, measurement success depends on other factors such as the selection and connection of sample tubing, cooling and heating requirements, sample gas pressure, and sample gas flow rate.

  • Page 60: Sample Tubes

    When measuring dew points above ambient temperature, the use of a heated inlet sample tube is needed. These are available from RHS in various lengths to suit your application, and a rear panel connector is provided for power supply and temperature control.

  • Page 61: Steam Trap

    6.1.3 Steam Trap (optional for 573H and HX) When measuring dew point at temperatures close to or above the ambient temperature, precautions to avoid the formation of condensation within the 573 must be taken. Failure to do so can result in errors of measurement, flooding of the sample path and possible damage to the instrument.

  • Page 62: Pressure

    Schematic for the connection of the Steam Trap 6.1.4 Pressure Frost/dew point is pressure dependent. It is important therefore that measuring head pressure and the application pressure are the same, or the effects of pressure are taken into consideration. The 573 has an integral measuring head pressure measurement that can be selected as one of the parameters to display or output.

  • Page 63: Sample Gas Flow

    6.1.6 Sample Gas Contamination Contaminants in a sample gas can have an influence on the measurement results obtained from any hygrometer. The Rhodium mirrors used in RHS mirrors are extremely robust and will withstand most application gases. Contaminants build up on the mirror surface and can cause measurement errors. During manual or automated mirror check routine (see chapter 5.4.5 on page 37), the mirror can compensate for surface...

  • Page 64: External Temperature

    6.2 External Temperature As frost/dew point is not temperature dependent, the instrument maintains its best measurement capa- bility across the full operational range. If the application requires relative humidity (RH), then careful consideration of temperature measurement is critical to achieve correct RH results. The 573 external temperature probe must be in a position that correctly represents the application con- dition or significant errors can result.

  • Page 65: Application Integration

    6.3 Application Integration The following are examples of typical 573 applications and some issues to consider. For further advice on any given application, please contact RHS or your supplier. 6.3.1 High Temperature Applications Due to the precision, longevity and robustness of chilled mirror instruments, the measurement of dew- point in heat treatment and other high temperature conditions remains one of their most important ap- plication areas.

  • Page 66: Dew Point Calibration

    6.3.5 Dew Point Calibration When using the 573 to compare with another instrument, the units must be connected in parallel as shown below. This prevents any masking effects of the first instrument in a series configuration. Pump Flow Pump Flow 6.3.6 Climatic Chamber Validation With the built-in sample pump and external temperature probe, the 573 can be used to calibrate or validate RH conditions.

  • Page 67: Operational Considerations

    If installed, filters must be routinely maintained within operational procedures. A blocked filter will reduce flow and could affect pressure. In some circumstances, the use of a heated filter may be needed to prevent condensation within the sampling system, please contact RHS or your supplier for further guid- ance if needed.

  • Page 68: Sample Gas Flow

    6.4.3 Sample Gas Flow The optimum flow rate through the measuring head is 0.5 l/min. See also chapter 0 ‘ RH Systems 573 Manual English V3.1...

  • Page 69: Temperature Measurement

    The coefficients specific to the PRT are stored within the internal memory of the 573. In the event that the probe is lost, damaged or replaced, new coefficients may be entered to obtain correct temperature measurement. Please contact RHS or your supplier for further advice. RH Systems 573 Manual English V3.1...

  • Page 70: Installation

    7 Installation 7.1 Facility Requirements 7.1.1 Environmental The 573 is a precise laboratory quality instrument. While it does not require any special environmental control, it works best when the temperature is stable and free of rapid transitions. For operation, it is best to keep the operating conditions within the following parameters if possible.

  • Page 71: Heating Of The Sampling System

    when the ambient or application temperature is higher than normal (> 30 °C). A recirculating water chiller or standard tap water flow at a temperature between approximately 10 and 20 °C may be used. The water cooling connections are either ¼” or 6 mm Swagelok fittings (specified on the order and by default the same as the sample gas input/output connection.

  • Page 72: Preparation For Use

    Careful planning and implementation will increase the likelihood or successful measurement and minimize risk of problems. If after careful review of this entire manual there are any doubts or questions, always refer to RHS or your supplier for guidance. 7.2.1 Benchtop Use All 573 models are suitable for bench top or other flat surface installation.

  • Page 73: Preparation For Shipping Or Transportation

    7.3 Preparation for Shipping or Transportation All shipping and transportation should be in suitable padded containers. A heavy duty container with at least 50…100 mm (2…4 inches) of foam padding is recommended. Due to the design of the 573 systems, any shipping container used should be constructed to provide support only on the top and bottom of the side panels and on the front and rear frame of the unit.

  • Page 74: Remote Communication

    8 Remote Communication The 573 is equipped with a bidirectional RS-232 communications interface which allows connection to a computer. This chapter provides the necessary information for the use of the interface, including the hardware connections, communications settings, and the command syntax. 8.1 Hardware Connection and Cabling Connect a computer to the 573 using a standard RS-232 9-pin extender cable.

  • Page 75: Communication Settings

    8.2 Communication Settings To communicate with the 573, set your computer to the following configuration: Baud Rate: 9600 Data Bits: Stop Bits: Handshaking: None 8.3 Command Syntax This chapter details the general syntax guidelines regarding termination, leading and trailing spaces, case sensitivity, and numeric values.

  • Page 76: Leading And Trailing Spaces

    8.3.3 Leading and Trailing Spaces The 573 ignores leading and trailing spaces. It also ignores spaces before and after equal signs and question marks. For example, both the following commands are perfectly valid. Dp ? However, the following command is invalid since spaces are embedded within the keywords. D p? 8.3.4 Case Sensitivity All commands are insensitive to case.

  • Page 77: Command Reference

    8.4 Command Reference Below you will find a list with all available commands grouped by function. All commands are considered read-only values. 8.4.1 Measurement Data Syntax Function Dew Point, °C Frost Point, °C Relative Humidity, % RHw? Relative Humidity (WMO), % PPMv? Volume Ratio, PPMv PPMw?

  • Page 78: Global Control Parameters

    8.4.4 Global Control Parameters Syntax Function Pump[=i][?] Pump on / off Heater[=i][?] Heater on / off MirrorCheck[=i][?] Execute mirrorcheck, manual Control[=n][?] D/F Mode on / off 8.4.5 Advanced Features Force Frost Settings Syntax Function ForceFrost.on[=i][?] 1 activates Force Frost (FF), 0 deactivates FF ForceFrost.below[=n][?] Temperature, under which FF activates, °C ForceFrost.coolTo[=n][?]...
  • Page 79 SteamTrap Settings (573H/HX only) Syntax Function Steamtrap[=i][?] 1 activates a manual steamtrap drain Steamtram.on[=i][?] 1 activates automated steamtrap drain cycles 0 disables steamtrap drain cycles Steamtrap.cycletime[=i][?] Steam trap cycle time in minutes Steamtrap.output[=i][?] Time how long steam trap is open, seconds SaveCfg=573 Saves all configurations to 573 Preparation for Mirror Cleaning...
  • Page 80 Control of the External heated Sample Tubes Syntax Function ExtHtrPID.on[?] 1→ external sample tube heating ON, 0→ OFF ExtHtrPID.setPt? External sample tube set point temperature, °C ExtHtrPID.fixedSetPt[=n][?] Set point for fixed tube temp control mode, °C ExtHtrPID.deltaSetPt[=n][?] Set point for delta tube temp control mode, °C ExtHtrPID.fixedOn[=i][?] 1→...

  • Page 81: Maintenance

    9 Maintenance 9.1 Calibrate the Touch Screen Before using the instrument for the first time, or when the instrument is used by different operators, you may wish to calibrate the touch screen to your finger positioning preference. Left and right handed peo- ple, for example, may have different points of pressure when using the touch screen.

  • Page 82: Mirror Cleaning

    9.2 Mirror Cleaning At the heart of the 573 is the measuring head assembly. It is highly sensitive and accurate, yet easily accessible for periodic mirror cleaning. To ensure high accuracy, the mirror should be cleaned before starting a measurement. Inspect the mirror carefully. Use a magnifying glass if necessary. If there are signs of contamination or if you suspect that contamination is present, use the following procedures to clean the mirror.

  • Page 83: Removing The Measuring Head Cover

    9.2.1 Removing the Measuring Head Cover 573S and 573H The measuring head is located on the right side of the 573 front panel. To gain access to the mirror and opto-electronic components, you must first remove the cover screw by twisting it counter clock- wise.
  • Page 84 573HX The measuring head of the dew point 373 is located on the right side of the front panel. To access the mirror or the other optical component to be removed, first, remove the measuring head clamp. Loosen the knob in the middle by turning it counterclockwise.

  • Page 85: Inspecting And Cleaning The Mirror

    9.2.2 Inspecting and Cleaning the Mirror The mirror requires occasional periodic cleaning to maintain high accuracy measurements. The flush mounted mirror is easily accessible by removing the cover screw and optical mirror assembly as de- scribed above. Inspect the mirror with the naked eye or with a magnifying glass. If signs of contamination are present, or suspected of being present, use the following procedure to clean the mirror.

  • Page 86: Exterior Cleaning

    9.3 Exterior Cleaning Front Panel The 573 front panel is completely sealed and can easily be cleaned with liquid glass cleaner or other mild cleaning chemical applied to a cloth. Clean the front panel periodically as needed when the instru- ment is switched off.

  • Page 87: Peltier Cooling Test

    9.5 Peltier Cooling Test The Peltier module used for mirror cooling and heating can age over time. It can also lose capability when used at its limits. If you think the measuring head is not cooling down fast enough during meas- urement, you can check this with the Peltier Cooling Test (PCT) function.
  • Page 88 RH Systems 573 Manual English V3.1...

  • Page 89: Error Messages

    10 Error Messages 10.1 Heater Feedback Sensor Failure Each heated component has its own tempera- ture sensor, in the event of this message ap- pearing, please contact RHS or your local sup- plier. RH Systems 573 Manual English V3.1...
  • Page 90 RH Systems 573 Manual English V3.1...

  • Page 91: Specifications

    11 Specifications Specifications 573S 573H 573HX Measuring Range Frost/Dew Point Min./Max. expected range of use -60...+20 °C -60…+70 °C -60…+95 °C Calibrated range -50...+20 °C -50…+70 °C -50…+95 °C Temperature -50…+100 °C -50…+100 °C -50…+100 °C Sample pressure 0…2500 mbar 0…2500 mbar 0…2500 mbar Instrument Features...
  • Page 92 We reserve the right to change design or technical data without notice. RH Systems 573 Manual English V3.1...

  • Page 93: Drawings

    12 Drawings Front View Side View RH Systems 573 Manual English V3.1...
  • Page 94 Top View RH Systems 573 Manual English V3.1...

  • Page 95: Faq's

    Solution B: Check the optical condition by observing the optic power indicator in the status line. If the optical components have a fault, dew/frost control will not start. Please contact RHS or your local supplier for advice. RH Systems 573 Manual English V3.1...

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