7. Remove the filter to access the sensors.
1 Vaisala HUMICAPâ sensor. Handle by
the plastic frame.
2 Temperature sensor. Do not touch or
attempt to remove.
3 Sensor socket.
4 Transmitter probe.
8. Pull out the old HUMICAPâ sensor, and insert the new one.
9. Perform a two-point humidity calibration on the serial line using the FCRH command.
10. Insert the new filter.
11. Reassemble, remount, and reconnect the transmitter.
12. Power up the transmitter.
More Information
‣
Two-Point Humidity Calibration and Adjustment Using Computer and HMK15 Humidity
Calibrator (page 59)
7.9
Filter Selection
When replacing the filter, note that there are two alternative filter options depending on the
probe model:
• HMS and HMD products use the membrane filter (Vaisala order code ASM210856SP)
• HMW products use the porous PTFE filter (Vaisala order code DRW239993SP)
HMDW110 User Guide M211726EN-D
68
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