Vaisala hmdw110 series, Руководство пользователя

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7. Maintenance
7.1 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 â sensors or filters. Instead,
replace them with new parts. Filters and sensors can be purchased from Vaisala.
More Information
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Spare Parts and Accessories (page 76)
7.2 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 it measures accurately is referred to as
adjustment .
HMDW110 series transmitters are fully calibrated as shipped from the 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:
• Always wait for measurement instruments to stabilize in the ambient temperature.
Temperature differences are a major source of measurement error.
• Check that there are no heat or moisture sources near the transmitter.
• Check that the transmitter is not in direct sunlight or close to the discharge of the supply
air ducts.
• Check that there is no moisture on the probe. If the sensor has become wet, you must
allow it to dry before you can measure.
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.
More Information
‣
Technical Support (page 87)
HMDW110 User Guide M211726EN-D
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