Chapter 3: Service & Maintenance
Page 40 HygroPro User’s Manual
3.3.5 Cleaning the Sensor and the Shield
CAUTION!
Do not place the transmitter module into the solvents.
Insert only the sensor portion of the instrument. Do not
allow the sensor to come into contact with the surfaces of
cleaning containers or with any other hard surface.
1. While wearing protective gloves, place the sensor in the first
container of hexane or toluene and allow it to soak for 10 minutes.
2. Remove the sensor from the hexane or toluene and soak it in the
container of distilled water for 10 minutes.
3. Remove the sensor from the distilled water and soak it in the
second (clean) container of hexane or toluene for 10 minutes.
4. Remove the sensor from the hexane or toluene and set it aside in a
clean area.
5. Repeat steps 1 to 3 to clean the shield. To ensure the removal of
any contaminants that may have become embedded in the porous
walls of the shield, swirl the shield in the solvents during the
soaking procedure.
6. Remove the shield from the hexane or toluene.
7. Carefully replace the shield over the exposed sensor without
touching the sensor.
8. Place the sensor with the installed shield in an oven set at
50°C ± 2°C (122°F ± 3.6°F) for 24 hours.
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