The power to the enclosure must be turned off before any
work is carried out in the measurement system enclosure.
Observe de-energize durations.
Gas line connections to the measurement system must be
isolated and de-pressurized before any work commences.
4.1 Calibration
Routine maintenance of the Easidew PRO XP is confi ned to regular re-calibration by
exposure of the transmitter to sample gases of known moisture content to ensure that
the stated accuracy is maintained. Calibration services traceable to the UK
National
Physical Laboratory
(NPL) and the US
National Institute of Standards and Technology
(NIST) are provided by Michell Instruments.
Michell Instruments offers a re-calibration service to suit specifi c needs. A Michell
representative can provide detailed, custom advice (for Michell Instruments’ contact
information go to www.michell.com).
4.2 Sensor Guard Replacement
The sensor is supplied with either a stainless steel sintered or HDPE guard.
The stainless steel guard provides >80m protection to the dew-point sensor, whereas
the HDPE protects to >10m. It is designed to show any contamination and the guard
should be changed if the surface becomes discolored.
When replacing the guard, care should be taken to minimize touching the guard which
should be handled by the threaded part. Replacement guards can be obtained by
contacting Michell Instruments (www.michell.com) or your local distributor.
Please note the sensor tile should not be touched.
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