Frequently Asked Questions:

  1. How do I calibrate the Moisture Monitor?
  2. How often should I calibrate the Moisture Monitor?
  3. How often change the samle system filter?
  4. How much is the analyzer venting?
  5. What should the sweep valve be set at?
  6. Moisture Monitor was flooded by fluid. Can i clean the sensor?
  7. What are the analog output settings?
  8. What is the range of the Moisture sensor?

1. How do I calibrate the Moisture Monitor?

Due to the results of testing done at Envent. Commecially available moisture cal-bottles appear to be unrepeatable thus unreliable as a calibration standard. In field calibration should be done with a Chilled Mirror. Adjustments of calibration value are made on the display.

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2. How often should I calibrate the Moisture Monitor?

Calibration checks should be done ever 3 to 6 months. Or as required by site preventive maintenance schedule.

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3. How often should I change the sample system filter?

The Filter should be changed as required. The frequency is dependant on the liquid content and particulates in the gas. A higher volume of a liquids and particulates will require more frequent changes. Filters should be checked when analyzer is calibrated.

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4. How much is the monitor venting?

The standard Moisture monitor vents 200cc per minute.

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5. What should the sweep valve be set at?

The sweep valve should be just opened slightly until flow can be felt from the tubing. This will reduce lag time and allow liquids to be removed.

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6. The Moisture Monitor was flooded by fluid can I clean the sensor?

Typically the moisture sensor can be cleaned after most contaminations. Use isopropyl alcohol only to clean the sensor. Then dry down sensor with clean dry gas.

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7. What are the Analog Output settings?

4-20mA wiring

The analog output of the Moisture Monitor is a 4-20 mA signal calibrated at factory. The connections requires loop power from the PLC. If loop power is not able to be supplied, a powered AO board addition can be purchased.

Symptom Solutions
PLC Indicating 0 mA Wiring to analyzer is incorrect.
Power to loop is not present. If loop power not supplied then Powered AO board option may be required.
PLC Indicating higher or lower signal than analyzer display Scaling of analyzer is different setting on PLC

Click here for typica Analog Output wiring diagrams

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8. What is the range of the Moisture sensor?

Factory settings scale of the moisture monitor analog output is 0-20 lbs. The sensor is capable of indicating above 500 lbs moisture at 60 deg centigrade.

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