Measuring / Operation
TriOxmatic
®
690
10
ba25314e05
09/2020
4.2.2
Calibration in water vapor-saturated air
Calibrating position
For calibration the membrane always has to be clean, for
calibration in air it has to be dry. Clean contaminated
sensors before calibration (see section 5.2 C
).
1
If necessary, clean the sensor and membrane and dry the
membrane (see section 5.2 C
2
Bring the sensor into the calibrating position.
To do so, position the sensor approx. 2 cm above a water
surface, best in a narrow bucket or similar container with water.
When doing so, no liquid should be brought on the membrane.
3
Start calibration as described in the operating manual of the
measuring transmitter.
In the case of air temperatures under 5 °C do not calibrate
the sensor in air but in air-saturated water that has a higher
temperature. You obtain air-saturated water by pouring
water several times in and out of two vessels so that it
sparkles.
Then immerse the sensor in a vessel with air-saturated
water (calibrating position) and calibrate as described
above.
2 cm
