Vaisala HMP110 Podręcznik Użytkownika Pobierz pdf (Strona 55)

Chapter 5 ______________________________________________________________ Maintenance

VAISALA _______________________________________________________________________ 53

Changing the HUMICAP 180R Sensor

(HMP110)

NOTE

Replacing the humidity sensor of the HMP110 is not necessary in

normal operation. If the accuracy of the probe does not seem to be

within specification, it is likely that the accuracy can be restored by

performing the adjustment procedure. See section Two-point

Adjustment of RH Measurement (HMP110) on page 48.

Follow this procedure to replace the humidity sensor of the HMP110 in

case it has been damaged, or normal adjustment is not sufficient to

restore the measurement accuracy. Calibration and adjustment of the

humidity measurement is required after the sensor change.

To perform this procedure, you need a new HUMICAP 180R sensor. It is

also recommended that you replace the filter with a new one. For order

codes, see section Options and Accessories on page 60.

1. Remove the filter from the probe by turning it counter-clockwise.

2. Pull out the old HUMICAP 180R sensor (the larger of the two

sensors inside the probe) and insert a new one. Refer to Figure 14

on page 52. Handle the new sensor by the plastic socket. DO NOT

TOUCH THE SENSOR PLATE.

3. Perform a two-point adjustment of the RH measurement as

instructed in section Two-point Adjustment of RH Measurement

(HMP110) on page 48.

4. Attach a new filter on the probe.

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Vaisala HMP110 Podręcznik Użytkownika Strona 55