085A-9800 Rev A
Page 16
MAINTENANCE AND TROUBLE SHOOTING
4.6.
General Maintenance Schedule
6 – 12 Month Intervals:
Inspect the sensor for proper operation per Section 4.0.
12 Month Interval:
Return the sensor to Met One Instruments for calibration.
Replace the two 720050 O-Rings.
Replace the 860014 Filter Membrane.
4.7.
085A Relative Humidity Sensor Maintenance and Calibration
WARNING: The sensor can be incorrectly calibrated or permanently damaged through
improper acts. Do not attempt a repair or calibration if you are unsure of the procedure.
Do not touch the sensor element if you do not know the correct procedure.
The instrument should operate for an extended period of time with a minimum of care or
maintenance.
The sensor should be re-calibrated every 12 months.
If parts or maintenance assistance are required, contact Met One Instruments. Obtain
shipping instructions and a return authorization (RA) before returning any unit.
4.8.
Sensor Maintenance
4.8.1. Sensor Element
The RH sensor element is not user-replaceable (replacement requires sensor
recalibration). If the element becomes damaged, please send the 085A sensor to Met
One Instruments for repair. Please obtain shipping instructions and a return
authorization (RA) number before returning any unit.
Met One Instruments manufactures an RH Calibration Kit part number 10233 which can
be purchased to perform a calibration after the sensor element is replaced. Please
contact the Met One Service Department to purchase the calibration kit.
