Owner manual

3. Remove the filter to access the sensors.

1 = Vaisala HUMICAP

sensor. Handle by the

plastic frame.

2 = Temperature sensor. Do not touch or

attempt to remove.

3 = Sensor socket.

4 = Transmitter probe.

4. Pull out the old HUMICAP

sensor, and insert the new one.

5. Perform a two-point humidity calibration on the serial line using the

FCRHcommand. See section Two-Point Humidity Calibration and

Adjustment using a computer and a HMK15 Humidity Calibrator on

page46.

6. Insert the new filter.

7. Duct models only: push the probe back into the duct, to the same depth

where it was before. Tighten the tightening screw on the fastening flange.

8. Power up the transmitter.

Replacing the HUMICAP

Sensor on HMS110/112

n New HUMICAP

humidity sensor (HUMICAP180R or

HUMICAP180VHP).

n New filter (always recommended when replacing the sensor).

n Medium size crosshead screwdriver (Pozidriv).

n Flat-head screwdriver

n 3 mm hex key (Allen key) for opening the radiation shield

screws.

5 Maintenance