MBW 473-RP2 Operation And Maintenance Manual
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MBW 473-RP2 Operation And Maintenance Manual

473 series dew point mirror
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Dew Point Mirror 473
Operation and
Maintenance Manual
V5.0

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Summary of Contents for MBW 473-RP2

  • Page 1 Dew Point Mirror 473 Operation and Maintenance Manual V5.0...

  • Page 3: Warranty

    MBW. MBW will not be liable for any other claims or damages, either direct, indirect, or consequential arising out of the use of its products.
  • Page 4 MBW 473 Manual English V5.0...

  • Page 5: Table Of Contents

    Selection of Units......................... 35 Selection of Color ........................36 Configuration of Optional Analog Outputs ................... 37 Diagnostic Functions ........................39 SET UP AND OPERATION ............... 43 Measurement Set Up........................43 External Temperature ........................44 Application Integration ......................... 45 MBW 473 Manual English V5.0...
  • Page 6 ERROR MESSAGES ................. 59 Reversible Error Messages ......................59 Irreversible Error Messages......................59 Fan failure SHX ........................... 60 SPECIFICATIONS ................. 61 DRAWINGS ................... 63 11.1 Display Unit ..........................63 11.2 Measuring Heads ......................... 65 FAQ’S ....................69 MBW 473 Manual English V5.0...

  • Page 7: Safety Instructions

    Instruments built for the SH3 measuring head supply more power through the measuring head cable. Therefore you must not connect an SH2 or RP2 measuring head to these display units, as it will damage the measuring heads. MBW 473 Manual English V5.0...
  • Page 8 MBW 473 Manual English V5.0...

  • Page 9: Key Features

    Calibration Check Function Users can check the 473 calibration at any time using the built-in Ice Test function, which provides instant verification of system accuracy and integrity. Connect and Go The system is ready for immediate use. MBW 473 Manual English V5.0...
  • Page 10 MBW 473 Manual English V5.0...

  • Page 11: Quick Start

    To understand your instrument thoroughly, please read the other sections carefully. 3.1 Unpacking The 473-RP2, SH2 and SHX are delivered in a custom-fit foam-lined Peli 1550 transport case. The 473-SH3 is supplied in a cardboard carton and does not include the external PRT as standard.

  • Page 12: Installing The Measuring Heads

    Use the supplied measuring head cable (2 m) to connect the measuring head to the back panel of the 473. For further information on the measuring heads, please refer to sections 4.4 ‘Measuring Heads’ and 8.2 ‘Mirror Cleaning’. MBW 473 Manual English V5.0...

  • Page 13: Starting Your 473

    If you are using the SH2 or the SHX measuring head, press the Fan key on the touch screen to turn the fan on/off. For further information on the fan refer to section 4.4 ’Measuring Heads’. MBW 473 Manual English V5.0...
  • Page 14 MBW 473 Manual English V5.0...

  • Page 15: Get To Know Your 473

    The display configuration can be customized, so your display may look different. The use and the functions of the display are described in the next chapter. Data Lines Status Line Fixed Menu Keypad Function Keys Keys MBW 473 Manual English V5.0...
  • Page 16 Density (when the state of the layer is uncertain) to either Dew Density or Frost Density (when ei- ther dew or frost is being measured). For more information regarding Dew/Frost point determination see section ‘Dew / Frost Control’ on page 30. MBW 473 Manual English V5.0...
  • Page 17 The menu selection is circular. Once you go past the last menu, the first one will appears again and the process starts over. You can use the ± key on the keypad to move backward through the menus. Use the Enter key to exit the menu. MBW 473 Manual English V5.0...

  • Page 18: Touch Screen

    Before using the 473 for the first time or when several users operate this unit, the touch screen can be calibrated to suit the user. The procedure is described in chapter 8.1 ‘Calibrate the Touch Screen’ on page 55. MBW 473 Manual English V5.0...

  • Page 19: Back Panel

    4.3 Back Panel Without Options With Barometric Pressure and Analog Output Options MBW 473 Manual English V5.0...
  • Page 20 Please refer to section 5.7 ‘Configuration of Optional Analog Outputs‘ on page 37 to learn how to configure the analog outputs. MBW 473 Manual English V5.0...
  • Page 21 The maximum voltage out- put range is -10…+10 V. See the following table to identify the corresponding current signal. Voltage Current [mA] MBW 473 Manual English V5.0...
  • Page 22 %RH, are to be computed. External temperature measurements are not required for dew or frost point measurements. If you wish to make your own thermometer cable, the 473 re- quires a 5 pin LEMO connector (www.lemo.ch), part number FGG 1B 305 CLAD 52. Red Dot aligns with Pin 1 MBW 473 Manual English V5.0...
  • Page 23 (pin 1) and goes counter-clockwise (as viewed from the rear of the unit). When the 5-pin LEMO connector is properly assembled, the red dot of the connector housing is located directly above pin 1. MBW 473 Manual English V5.0...

  • Page 24: Measuring Heads

    The fan of the SH2 measuring head is used to generate the necessary gas flow to the measuring head, when no other gas flow is available. The fan can be removed and replaced with an output con- nector (Swagelok SS-6M0-1-2RS) for direct connection of gas tubing to other instruments. MBW 473 Manual English V5.0...
  • Page 25 The fan of the SHX measuring head is used to generate the necessary gas flow to the measuring head, when no other stable gas flow is available. The fan can be removed and replaced with an output connector (Swagelok SS-6M0-1-2RS) for direct connection of gas tubing to other instruments. MBW 473 Manual English V5.0...
  • Page 26 2. Gas Outlet (6 mm Swagelok) 3. 15-pin Measuring Head Cable (2 m) 4. 2-pin Fan Cable 5. Measuring Head Fan 6. 15-pin Measuring Head Cable Connector 7. Screw Cover 8. Optical Module 9. Guide Pin 10. Polished Mirror MBW 473 Manual English V5.0...
  • Page 27 The Fan button on the display refers to the gas flow fan of the SH2. Therefore, when you have a SH3 measuring head installed and you press the Fan button, a message will appear saying you that there is no fan installed. MBW 473 Manual English V5.0...
  • Page 28 However, the SH3, SH2 and RP2 use the same 19-pin connection. Therefore, caution must be taken not to connect the SH3 measuring head to the 473-SH2 /-RP2 display unit or the SH2 or RP2 measuring heads to the 473-SH3 display unit. MBW 473 Manual English V5.0...

  • Page 29: Carrying Handle

    To adjust the position of the carrying han- dle, press the buttons on both sides. Re- lease the buttons when the handle is in the desired position. Ensure that the handle has locked into place before lifting the instru- ment. MBW 473 Manual English V5.0...
  • Page 30 MBW 473 Manual English V5.0...

  • Page 31: System Configuration

    The background color of each data line can be changed indi- vidually. Unlike the other settings, the color settings will be restored to the standard color set- tings when the 473 is restarted. MBW 473 Manual English V5.0...

  • Page 32: Selection Of Indicated Parameters

    (solid or liquid) at a given temperature. It is usually expressed in kPa. Head Pressure The pressure of the gas sample in the measuring head. External Temp The temperature measured by the external temperature probe. Head Temp The temperature measured by the PRT in the measuring head. MBW 473 Manual English V5.0...

  • Page 33: Selection Of Numeric Or Graphic Data Display

    2. Press the arrow key next to the data line that you wish to change. The data line will toggle be- tween numerical and graphic mode each time you press the key. MBW 473 Manual English V5.0...
  • Page 34 20.0 °C will set the minimum and maximum value limits of the graph to 19.95 °C and 20.05 °C, respectively. The graph will also zoom out as needed if a reading goes outside that range. You can experiment with this value to determine your personal preference. MBW 473 Manual English V5.0...
  • Page 35 See sections 5.2 and 5.3 for instructions on selecting displayed parameters and changing their display modes. MBW 473 Manual English V5.0...

  • Page 36: Control Setup

    Press the OK button in the dialog box or press Enter on the keypad to confirm the new value. Press Cancel to leave it unchanged. MBW 473 Manual English V5.0...
  • Page 37 °C). For example, a vapor pressure of 38 Pa corresponds to a frost point of −30 °C and a dew point of −33 °C. From a measuring perspective it seems obvious that a clear and consistent dis- tinction between dew and frost point is important. MBW 473 Manual English V5.0...
  • Page 38 After the Mirror Check is completed the bar of the Mirror Residue Indicator shows the amount of con- tamination on the mirror. If the bar covers more than a quarter of the space, we recommend that you clean the mirror. For instructions on mirror cleaning, please refer to section 8.2 ’Mirror Cleaning’. MBW 473 Manual English V5.0...
  • Page 39 The fan has variable power (range 20…100%) so that the user can change the flow rate. It is recommended that the fan power is set within the range 20…40% for typical use, that is with no or little tubing in front of the measuring head. MBW 473 Manual English V5.0...
  • Page 40 If the flow restriction of your setup is known you can derive an adequate power setting by choosing the power setting at the intersection of desired flow and your flow restriction (in Pa). The performance is only slightly reduced in high temperatures (~10% @ 125°C) MBW 473 Manual English V5.0...

  • Page 41: Selection Of Units

    , mg/m or lb/ft Specific Humidity Units g/g, g/kg or lb/lb Vapor Pressure Units Pa, hPa, kPa, MPa, atm, bar, mb, inHg, mmHg, cmHg, inH O, mmH O, cmH O, Torr or psia MBW 473 Manual English V5.0...

  • Page 42: Selection Of Color

    Note that the background color of the data line will change with each touch of the key. 3. Change the background color on any of the other data lines in the same way. MBW 473 Manual English V5.0...

  • Page 43: Configuration Of Optional Analog Outputs

    Dew Point [°C] Frost Point [°C] RH WMO Volume Ratio [PPMv] Weight Ratio [PPMw] Absolute Humidity [g/m Specific Humidity [g/kg] Vapor Pressure [Pa] Head Pressure [Pa abs] Flow Rate [l/min] External Temperature [°C] Head Temperature [°C] MBW 473 Manual English V5.0...
  • Page 44 Calibration Adjustment D/A Cal Gain and D/A Cal Zero are used to adjust the analog output signal accuracy. This adjustment is made at the factory and will rarely need to be changed by the user. MBW 473 Manual English V5.0...

  • Page 45: Diagnostic Functions

    Press the menu selection key on the lower right to select the Diagnostic Functions menu. Then press the Ice Test but- ton. Please note that the Ice Test will start immediately after the Ice Test button has been pressed. MBW 473 Manual English V5.0...
  • Page 46 Press the Ok button on the PASS/FAIL status window. The next window requests that you clean the mirror. Clean and reassemble the measuring head as described in section 8.2 ’Mirror Cleaning’. MBW 473 Manual English V5.0...
  • Page 47 PLT: Peltier current during test should be around 1.5 Amps These results apply for model RP2, SH2 and SHX, but not for SH3 due to several available varia- tions. Please contact MBW for more information. MBW 473 Manual English V5.0...
  • Page 48 4. Enter the desired baud rate. (1200, 2400, 4800, 9600, 19200, 38400, 57600, 115200 are possible values) 5. If you make an entry error, touch the field that holds the number you wish to change. Each time you touch the field, the last digit entered will be deleted. MBW 473 Manual English V5.0...

  • Page 49: Set Up And Operation

    Back Panel Connections The following picture shows the back panel of a fully connected 473 with RS-232 cable, 19-pin meas- uring head cable, power cable and the Ø2 x 100 mm PRT on the 3 m cable. MBW 473 Manual English V5.0...

  • Page 50: External Temperature

    If you want to start using an external tempera- ture probe, go to the Fixed External Tempera- ture window and press the Use Fixed Ext Temp to disable the fixed external temperature function. The green square will turn grey. MBW 473 Manual English V5.0...

  • Page 51: Application Integration

    SH measuring head can be used to provide the needed airflow through the meas- uring head. If necessary for your application, an extension sample tube can be added using 6mm or ¼” Swagelok fittings as shown. MBW 473 Manual English V5.0...
  • Page 52 Software such as that supplied with the MBW T12 temperature system can be used to display and record the dew point, temperature and calculated %RH values. Please contact MBW or your local supplier for more information. RH Generator Validation Transportable RH Generators provide a convenient and fast way of calibrating RH instruments.
  • Page 53 Use the ‘Measuring Head Temperature’ parameter of the 473 to avoid this effect. MBW 473 Manual English V5.0...
  • Page 54 For further support, please contact MBW or your local distributor. MBW 473 Manual English V5.0...

  • Page 55: Remote Communication

    * are required, while the others are optional. Signal Direction Computer Computer (9 pin) (9 pin) (25 pin)  *TxD  *RxD    *GND    * Denotes a required connection. All others are optional. MBW 473 Manual English V5.0...

  • Page 56: Communication Settings

    (sent by the computer to the 473) -10.015 (sent by the 473 back to the computer) If the command is unrecognized, the 473 does not respond. See example below. Abcdef? (invalid command sent from the computer) (no response from the 473) MBW 473 Manual English V5.0...
  • Page 57 RS-232), you affect only what is seen on the display. All numerical values retrieved from the RS-232 will always be in the following units. Parameter Units via RS-232 Temperature °C Pressure Flow Volume Ratio PPMv Weight Ratio PPMw MBW 473 Manual English V5.0...

  • Page 58: Command Reference

    Function Stable? 1 = system is stable, 0 = not stable Global Control Parameters Syntax Function Pump[=i][?] Fan on / off / status MirrorCheck[=i][?] Execute mirror check Control[=i][?] D/F Mode on / off / status MBW 473 Manual English V5.0...
  • Page 59 Callendar VanDusen B coefficient, ~ –5.775e-7 ExtTempCal.c[=n][?] Callendar VanDusen C coefficient, ~ -4.183e-12 ExtTempCal.avg[=n][?] Amount of averaging applied to measurement, ~40 ExtTempCal.avgBand[=i][?] Only average when measurements remain within this band, ~ 0.2 °C SaveCal=473 Save these and other calibration parameters MBW 473 Manual English V5.0...
  • Page 60 Ana1.param = i SaveCfg=473 Saves all configurations to 473 Communication Settings Syntax Function Baud[=n][?] Set Baud Rate: 1200, 2400, 4800, 9600, 19200, 38400, 57600, 115200. (Default rate is 9600) SaveCfg=473 Saves all configurations to 473 MBW 473 Manual English V5.0...

  • Page 61: Maintenance

    Test your new touch screen calibration by pressing the bottom right menu selection key several times. If it does not work to your satisfaction, repeat the calibration. MBW 473 Manual English V5.0...

  • Page 62: Mirror Cleaning

    Never attempt to polish the mirror. If necessary clean the mirror with metha- nol or similar alcohol. Then clean the mirror with distilled water to ensure the cleaning chemicals are completely re- moved from the mirror surface. MBW 473 Manual English V5.0...

  • Page 63: Exterior Cleaning

    8.3 Exterior Cleaning Front Panel The 473 front panel is completely sealed and can easily be cleaned with liquid glass cleaner or other mild cleaning chemicals applied to a cloth. Clean the front panel periodically as needed. MBW 473 Manual English V5.0...

  • Page 64: Peltier Cooling Test

    Apart from periodic mirror cleaning, the 473 requires very little maintenance, but the following checks are recommended to maintain the optimal instrument performance: Check and clean the fan Check the condition of power, RS-232 and other external cables and connectors Check the condition of connections MBW 473 Manual English V5.0...

  • Page 65: Error Messages

    %g Amp. = measured current Try again after several minutes, if value on the Peltier it fails again, contact MBW service Mirror temp limit ex- Mirror temperature is too high Chamber temperature may be too ceeded high.

  • Page 66: Fan Failure Shx

    MBW service Fan supply failure The fan driver in the display unit A blown fuse on the fan driver detects that the supply voltage PCB. Contact MBW service of the fan is missing/is too low MBW 473 Manual English V5.0...

  • Page 67: Specifications

    We reserve the right to change design or technical data without notice. The RP2 measuring head is only suitable for use in applications with moving air. To reach the lower measuring range limit of -50 °C FP the ambient temperature must not be above 23 °C. MBW 473 Manual English V5.0...
  • Page 68 MBW 473 Manual English V5.0...

  • Page 69: Drawings

    11 Drawings 11.1 Display Unit Side View MBW 473 Manual English V5.0...
  • Page 70 Front View Back View MBW 473 Manual English V5.0...

  • Page 71: Measuring Heads

    11.2 Measuring Heads MBW 473 Manual English V5.0...
  • Page 72 MBW 473 Manual English V5.0...
  • Page 73 MBW 473 Manual English V5.0...
  • Page 74 MBW 473 Manual English V5.0...

  • Page 75: Faq's

    Solution B: Check the optical condition by observing the optic power indicator in the status line. If the optical components are faulty, dew/frost control will not start. Please contact MBW or your local supplier for advice. MBW 473 Manual English V5.0...

This manual is also suitable for:

473-sh2473-sh3473-shx

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