Calibration In Water Vapor-Saturated Air - Xylem WTW TriOxmatic 690 Operating Manual

Measuring / Operation
Calibrating position
10
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
SENSOR SHAFT AND MEMBRANE

4.2.2 Calibration in water vapor-saturated air

1 If necessary, clean the sensor and membrane and dry the
membrane (see section 5.2 C
).
MEMBRANE
2 cm
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.
TriOxmatic
LEANING THE
).
LEANING THE SENSOR SHAFT AND
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09/2020