WatchGas NEO Service Manual
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WatchGas NEO Service Manual

Photoionization detector
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D e t e c t i o n
Service Manual
NEO Photoionization Detectors
www.watchgas.eu

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  • Page 1 D e t e c t i o n Service Manual NEO Photoionization Detectors www.watchgas.eu...

  • Page 2: Table Of Contents

    NEO Photoionization Detector Service Manual D e t e c t i o n D e t e c t i o n Contents Contents Read Before Operating General Information Maintenance 2.1. Cleaning or Changing PID Sensor / Lamp 2.1.1. Lamp Cleaning and Changing 2.1.2.

  • Page 3: Read Before Operating

    For safety reasons, this equipment must be operated and serviced by qualified personnel only. Read and understand the instruction manual completely before operating or servicing. • Use only WatchGas battery pack M011-3002-000. Substitution of components may impair intrinsic safety. Recharge batteries only in non-hazardous locations. •...

  • Page 4: General Information

    The NEO is one of the most advanced handheld VOC (Volatile Organic Compound) monitors availa- ble for ppb (parts per billion) detection. The NEO offers several models from the most sensitive 1 ppb to a high range up to 15000 ppm for different applications and user selections. Novel designs of the photo-ionization detector (PID) and ultraviolet (UV) lamp provide outstanding sensitivity, stability and reproducibility.

  • Page 5: Maintenance

    Service Manual Photoionization Detector NEO D e t e c t i o n D e t e c t i o n 2. Maintenance 2.1 CLEANING OR CHANGING PID SENSOR / LAMP 2.1.1 Lamp Cleaning and Changing 1. Unscrew the Sensor Cap and pull the sensor straight out, using a slight rocking motion if necessary.

  • Page 6: Sensor Cleaning

    PID raw signals can be accessed for aid in troubleshooting lamp/sensor problems. Connect the instru- ment to WatchGas Suite on a PC or the mobile App, check the “Enable Diagnostic” box in the Configu- ration screen (“General” section), and send to the instrument. The table below lists typical readings for a...

  • Page 7: Sampling Pump

    Typically the green O-ring should be partially visible. 3. Check the Pump stall threshold in Configuration Mode (see NEO User Guide). Briefly block the inlet probe with a finger and observe...
  • Page 8 500 or above. Set the stall threshold about 50-100 units above the unblocked pump reading, but lower than the blocked pump reading. NOTE: For NEO Benz MP186, set the stall threshold with an open (used) tube in the holder to avoid a stall alarm when a tube is inserted for benzene measurements.

  • Page 9: Battery Replacement

    Service Manual Photoionization Detector NEO D e t e c t i o n D e t e c t i o n Wipe clean the pump gas- ket. It may help to remove it (very carefully to avoid da- mage) and clean both sides.
  • Page 10 NEO Photoionization Detector Service Manual D e t e c t i o n D e t e c t i o n Torx head driver to remove battery bracket...

  • Page 11: Troubleshooting

    Teflon tube compression fitting Lamp drive circuit Turn unit off and back on “Lamp” alarm on during operation Weak or defective PID Lamp Replace UV Lamp PC does not recognize Use WatchGas USB cable P/N M-011-3003- Wrong cable instrument www.watchgas.eu...

  • Page 12: Replacement Parts

    Pump Assembly for NEO MP18X Series Pump rebuild kit (3 oval gaskets and 1 piston diaphragm) LCD Display for POLI MP400 & NEO MP18X Series (raw LCD, 10 pcs each) LCD Assembly for NEO MP18X Series (includes casing, 1 pc) Housing base and cover assembly replacement for NEO WatchGas B.V.

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