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Replacing the HUMICAP® RH Sensor

46 VAISALA

Replacing the HUMICAP® RH Sensor

Replace a dirty filter to ensure maximum operating life and a

fast sensor response time. Do not attempt to clean the filter.

Fixed and Remote Probe Models

To replace the RH sensor:

Remove the filter (plastic grid or sintered stainless steel).

2 Remove the damaged sensor and insert a new one.

3 If required, recalibrate the probe (see Calibration and

Adjustment on page 48).

Removing and Fastening the Probe

Fixed Probe Model

To remove and replace a fixed probe:

Loosen the metal locking bushing by carefully turning it

counter clockwise.

2 Remove the probe from the transmitter by pulling it

gently outwards.

3 Attach the new probe to the 4-pin M8 panel connector at

the transmitter (only one position possible).

4 Tighten the locking bushing to the M8 panel connector

by turning it clockwise.

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Vaisala HMT140 Guía de usuario Pagina 54