Document Outline

• 8800P.pdf
  • 1. Introduction
    • 1. XPDM Portable Instrument with sensor, desiccant...
    • 2. 2 VCO to Swagelok fittings and 2 Swagelok to ba...
    • 3. Calibration bulb.
    • 4. Shoulder strap.
    • 5. VCO to VCO Fittings.
    • 6. Pig tail.
    • 7. Flexible stainless steel hose.
    • 8. Pressure regulator, all stainless steel, (prese...
    • 9. Coalescing filter, all stainless steel with mou...
    • 10. Wall transformer (with factory installed I/O o...
    • 11. Replacement desiccant cartridge.
    • 12. Padded transport case.
  • 2. Precautions
  • 3. Principle of Operation
  • 4. Operating the XPDM
    • 4.1. Sample Hook-up
    • 4.1.1. Fittings
    • 4.1.2 Recommended Pipes
    • 4.1.3. Sample conditioning
    • 4.2. Measuring
  • 5.0 The User Interface
    • 5.1 Display Conventions
      • 1. To display letters with the 7 segment numeric d...
      • 2. The instrument will indicate whether a particul...
      • 3. °C°F appear simultaneously, to indicate the sen...
      • 4. Values higher than ±1999 and lower than ±0.01 a...
    • 5.2 Operating State
    • 5.2.1 Viewing Dewpoint Mode
    • 5.2.2 Viewing Temperature at Sensor
    • 5.2.3 Start Autocal Mode
    • 5.2.4 Viewing Serial Number Mode
    • 5.3 Set-up State
      • 1. Testing the optional analog output: By pushing ...
      • 2. Display of alternate units: In this mode, a sec...
      • 3. Selecting the sensor type: In this mode the use...
      • 4. Adjusting low end sensor attenuation and/or dew...
      • 5. Manual calibration: (Not yet available) In this...
      • 6. Output range setting: These modes are used to s...
      • 7. Lock/Unlock the instrument: This mode is used t...
  • 6. Options
    • 1. RS-232C.
    • 2. Current Loop output (4-20mA or 0-24mA).
    • 3. Operation from an external power supply e.g. a ...
    • 6.1 RS-232C
    • 1
    • Current Loop out
    • 6
    • strapped to 4
    • 2
    • Tx
    • 7
    • looped from pin 8 through RS-232 level driver
    • 3
    • Rx
    • 8
    • looped to pin 7 through RS-232 level receiver.
    • 4
    • strapped to 6
    • 9
    • current loop select:Open=0-24mA,Grounded=4-20mA
    • 5
    • Gnd-RS232 & Current Loop
      • 6.2 Current Loop Output
      • 6.3 Operating from an external Power Supply
  • 7. Automatic Calibration
    • 1. Make sure that the ambient temperature where yo...
    • 2. Remove the adapter from the bulb (hand pump).
    • 3. Moisten the sponge with 1 or 2 drops of water a...
    • 4. Turn instrument on. Refer to section 5.2.
    • 5. Press the Mode key twice. The display will indi...
    • 6. Press the Up key, to confirm you want to perfor...
    • 7. Pull sensor actuator to measurement position, a...
    • 8. Push Up key to initiate the calibration procedu...
    • 9. Keep pumping intermittently to assure wet micro...
    • 10. After one minute, the instrument displays cali...
    • 11. Push in the sensor actuator.
  • 8. Changing desiccant cartridge and/or battery.
  • 9. Special messages, warnings and error indication...
    • PROM check sum failed.
    • power on tests
    • RAM write/read test failed.
    • cycle power / replace battery,
    • Unidentified power-up failure.
    • if problem persists,
    • EEPROM Check Sum Failed.
    • return to your representative
    • A/D converter failure.
    • system tests once per 2 min.
    • for service.
    • Reference voltage for A/D out of spec.
    • Low battery voltage.
    • replace battery.
    • Instrument low temperature range
    • has been exceeded.
    • make sure that the unit is at a
    • Instrument high temperature range
    • has been exceeded.
    • temperature of -10˚C to +50˚C.
    • Sensor circuit is open.
    • dewpoint displays tests
    • check sensor. wetup sensor to see if it will react...
    • Sensor is saturated.
    • dry down the sensor.
    • Sensor circuit is shorted.
    • check sensor.
    • Trying to calculate dewpoint for undefined sensor....
    • select sensor and autocal.
    • Viewing dewpoint while sensor is in desiccant dry-...
    • a reminder that the dewpoint in the desiccant is b...
    • Trying to calibrate an undefined sensor.
    • autocal tests
    • Prompting to pull out the sensor from desiccant to...
    • see autocal instructions.
    • Sensor reading is ‘too’ low to be from a saturated...
    • EEPROM write cycle not completed.
    • miscellaneous
    • if this persists, return for service.
    • Attempting to modify a locked unit.
    • unlock unit, see set-up mode.
    • Sensor is neither in nor out of desiccant.
    • pull out or push in the sensor actuator
    • Turn on message, Xentaur (Greek X=X)
    • Turn off message, good-bye.
  • Appendix A: Flow diagram of User Interface in the ...
  • Appendix B: Flow Diagram of User Interface in the ...
  • Appendix C: Relationship of Instrument Reading and...
  • Appendix D: Uncertainty in LBS and PPMV calculatio...
  • Appendix E: Battery Life