COSA Xentaur Hygrocontrol Type 86 Ex - Manual (Page 19)

3.2.5 Calibration Procedure
Proceed as follows:
- Mount the calibration chamber as described before
- Remove the bottom of the chamber to fill it with the desired solution
- Break the neck of the ... %RH ampoule and fill its content into the bottom
- Close the calibration chamber thoroughly in vertical position to avoid
contact of the liquid with the sensor
- Place code switch "S1" to a position according to the choosen value given
in table 1 and code bridge "X4" to position "P"
Table 1
brown magenta green yellow red blue white Granulate Colour Code of
Calibration Solution
95 80 65 50 35 20 10 0 Calibration Solution
(% RH)
7 6 5 4 3 2 1 0 Position of Code
Switch „S1”
- The LED „H3" starts blinking now slowly as long as unstable humidities are
detected - the display (if present) shows the actual value of humidity and
the humidity to be calibrated
- After stability of humidity is detected, the LED „H3” and the display (if
present) show a steady signal - the ... %RH calbration is finished and
may be stored.
- If you now remove the code bridge „X4” out of position „P”, the new value
will be stored and this is shown by the lightning of LED’s „H2”, „H3” and
„H4”.
- If you don’t want to store the new value, you must turn the code switch „S1”
to another position before removing the code bridge „X4”
- Place code switch „S1” into position "0" - LED will turn dark and the
humidity output will show the calibrated ... %RH value with a deviation of
max. 0,5%RH.
- Place code bridge „X4" into position „M" now, to return to normal measuring
mode.
If more calibrations are to follow, proceed as described before, using the
solution you want to calibrate with.
Never forget to clean the bottom of the chamber and dry it
thoroughly before starting the next calibrating procedure!
HYGROCONTROL Manual for Type 86 Ex Page
18