E+E Elektronik EE31, User Manual

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15
Hardware
7.3 1-point humidity calibration
When the working range is limited to a certain more narrow range,
a calibration at one humidity point is absolutely sufficient.
•
In accordance with the working range, either the high or low
calibration point should be selected. (CP > or < 50% RH)
•
This calibration causes an extra inaccuracy for the rest of the
working range.
•
The one point humidity calibration may be done directly on the
circuit board, or for convenience, using the configuration softwa-
re supplied. (for more details, see the Configuration software,
5.4 “Calibration” / 1-point humidity calibration)
1-point humidity calibration procedure on the circuit board!
1. Insert the sensor probe into the reference humidity (calibra-
tion point) and stabilise for at least 20 minutes.
2. BUTTON S2
: Pressing the button for 5 seconds starts the
procedure for the calibration mode RH. The calibration mode is
indicated by the lit LED "D2" on the circuit board.
3. BUTTON S1 : Pressing the button for 5 seconds starts the
procedure. The calibration mode is indicated by the lit LED
"D2" and the symbol "CALIB HIGH" will appear on the optional
LC display (CP = 50% RH).
or
BUTTON S2 : Pressing the button for 5 seconds starts the
procedure. The calibration mode is indicated by the lit LED
"D2" and the symbol "CALIB LOW" will appear on the optional
LCD (CP < 50% RH).
4. BUTTON S1 (up) and S2 (down) : Pressing one of the two
buttons will adjust the measuring value in steps of 0.1% up or
down to the reference value. The actual measuring value is
indicated on the display or can be measured with the analogue
output.
5. BUTTON S1 (store) : Pressing the button for 5 seconds
stores the calibration value and the procedure is ended. LED
"D2" flashes to indicate exiting of the calibration mode and the
symbol "CALIB LOW" or "CALIB HIGH" will disappear from the
optional LC display.
BUTTON S2 (cancel)
: Pressing the button for 5 seconds the
calibration procedure will be ended without storing the calibra-
tion values. LED "D2" flashes to indicate exiting of the calibra-
tion mode and the symbol "CALIB LOW" or "CALIB HIGH" will
disappear from the optional LC display.
“CALIB HIGH”
“CALIB LOW”