Changing HUMICAP sensor - HMP155

HMP155 User Guide
Document code
M210912EN
Revision
G.1
Language
English
Product
HMP155
Document type
User guide
You can change INTERCAP, HUMICAP180R, and HUMICAPR2 sensor yourself.
CAUTION Never replace INTERCAP with HUMICAP180R, or INTERCAP with HUMICAPR2, or the other way round.

You can replace HUMICAP180R with HUMICAPR2, and the other way round.

CAUTION In HUMICAP180RC/R2C and INTERCAPC models, the temperature sensor is integrated with the relative humidity sensor and Vaisala recommends sending HUMICAP180RC/R2C and INTERCAPC sensors to Vaisala Service.

If you change the sensor yourself, these instructions apply, except that before removing the damaged sensor, you must unsolder the connections from the temperature sensor pins. You must also solder the new temperature sensor connections to the temperature sensor pins. Be careful when soldering the sensor pins.

  1. Remove the filter from the probe.
  2. After removing the filter, check the O-ring and change it, if necessary.
    Figure 1. Changing INTERCAP/HUMICAP180R/HUMICAPR2 sensors
    1
    Filter
    2
    O-ring
    3
    HUMICAP sensor
    4
    Pt100 temperature sensor
  3. Remove the damaged sensor and insert a new one.
    CAUTION Handle the new sensor by the plastic socket. Do not touch the sensor plate.
  4. After the sensor change, perform humidity calibration and adjustment.
  5. Attach a new filter on the probe.