Owner manual

5 MAINTENANCE

Cleaning

The body of the transmitter can be cleaned by wiping with a moistened lint-free

cloth. Do not use cleaning agents or solvents, or blow pressurized air into the

transmitter housing or on the filter.

Do not attempt to clean contaminated HUMICAP

sensors or

filters. Instead, replace them with new parts. Filters and sensors

can be purchased from Vaisala. For order codes, see Spare

Parts and Accessories on page59.

Calibration and Adjustment

Calibration means comparing the instrument to a known

reference, either against a second instrument or a known

reference environment. Correcting the reading of the instrument

so that is measures accurately is referred to as adjustment.

Performing an accurate calibration and adjustment takes some

time and preparation. Instead of doing it yourself, you can also

have a Vaisala service center calibrate and adjust your

transmitter. For contact information, see section Product returns

on page55.

HMDW110 series transmitters are fully calibrated as shipped from factory. You

can use the service port to calibrate and adjust the humidity and temperature

measurement of the transmitter as needed. If you think the transmitter is not

measuring correctly, check the following before starting any calibration and

adjustment procedure:

5 Maintenance