Chapter 4 Operation
34
Wet-bulb Wick Check
(Not necessary with LU cabinet)
•
The wet-bulb wick (included) must be installed in order to run
humidity tests. If already in place, check whether it is wet or dry
before starting. If dry, change it.
•
Bacteria adhering to the wet-bulb wick can proliferate during tests
and block water supply. Wash hands with soap and water before
handling the wick.
•
Make sure the edge of the wet-bulb wick is aligned with the tip of
the wet-bulb temperature sensor. Humidity control can be
destabilized if the sensor is overly exposed or if the sensor is out
of position. Feed the wet-bulb temperature sensor through the top
hole and the wick pan through the bottom hole.
•
Remove the wet-bulb wick for temperature-only tests, especially if
running the cabinet above ambient temperature. Should the wick
dry out, it will be harder to supply it with water, which will throw off
humidity measurements the next time a humidity test is run.
1. Wipe the wet-bulb temperature sensor clean with clean gauze or
cloth.
2. Remove the wet-bulb wick from its bag.
3. Drape the wet-bulb wick over the wet-bulb temperature sensor.
Make sure the edge of the wet-bulb wick is aligned with the tip of the
wet-bulb temperature sensor.
Wet-bulb wick
Wet-bulb
temperature
sensor
Dry-bulb
temperature
sensor
Wick pan
Fig. 4.9 How to set the wet-bulb wick 1
Note
Reference
Procedure
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