Sensor element, Figure 25, Sensor element is located under the filter – Vaisala HMT360N User Manual
Page 73
Chapter 7 ______________________________________________________________ Maintenance
VAISALA _______________________________________________________________________ 71
Sensor Element
Check the Vaisala HUMICAP
®
sensor in your transmitter regularly. A
corroded or otherwise damaged sensor has to be replaced, which needs
to be done by your nearest Vaisala Service Center. See section
0605-052
Figure 25
Sensor Element is Located under the Filter
The sensor element is located under the sintered steel filter. A dirty
sensor element can be cleaned by soaking the sensor in de-ionized water
or IPA (isopropanol, propan-2-ol), as follows:
1.
Carefully remove the sintered steel filter from the probe.
2.
Rinse the sensor with de-ionized water or IPA for no more than one
minute.
3.
Gently dehydrate the sensor with dry gas (nitrogen) if available.
4.
When the sensor and probe are both dry, install the filter back to
the probe.
CAUTION
Do not touch the sensor surface.
Only de-ionized water or IPA is allowed, other agents such as ethanol
cannot be used.
Do not immerse the sensor in water or IPA for more than one minute.
Water or IPA temperature must be below 30 °C (86 °F)
Do not use a cotton stick or any other mechanical means for cleaning
and/or drying the sensor.