Vaisala HMP60 Guide de l'utilisateur télécharger pdf (Page 57)

Chapter 5 ______________________________________________________________ Maintenance

VAISALA _______________________________________________________________________ 55

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 50.

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 62.

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

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

sensors inside the probe) and insert a new one. Refer to Figure 17

on page 54. Handle the new sensor by the plastic frame. 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 50.

4. Attach a new filter on the probe.

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Vaisala HMP60 Guide de l'utilisateur Page 57