Vaisala HUMICAP HMP155 Betriebsanweisung PDF herunterladen (Seite 54)

USER'S GUIDE____________________________________________________________________

52 _______________________________________________________________ M210912EN-C

Changing the Sensor

You can change the HUMICAP

sensor yourself and the probe does not

have to be sent in for service for a sensor change.

NOTE

Both HUMICAP

180 and HUMICAP

180R sensors can be changed,

but you must never replace a HUMICAP

180 sensor with a

HUMICAP

180R sensor or vice versa.

To change the sensor:

1. Remove the filter from the probe. See the instructions in section

Changing the Probe Filter on page 51.

2. After remo

ving the filter, check the O-ring and change it if

necessary. See Figure 12 on page 53.

3. Rem

ove the damaged sensor and insert a new one. Handle the new

sensor by the plastic socket. DO NOT TOUCH THE SENSOR

PLATE.

4. After sensor change the humidity calibration must be done

according to the instructions, see section Relative Humidity

Adjustm

ent after Sensor Change

on page 65.

5. Attach a new filter on the probe.

CAUTION

In HUMICAP

180C/180RC models, the temperature sensor is integrated

with the relative humidity sensor. It is recommended that these type of

sensors are changed by Vaisala Service. See section Product Returns on

page 55.

If you do change the sensor yourself, the instructions above apply, except

now before rem

oving the dama

ged sensor, you need to unsolder the

connections from the temperature sensor pins. Likewise the new

temperature sensor connections need to be soldered to the temperature

sensor pins. Be careful when soldering the sensor pins.

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