11
5.
HUMIDITY CALIBRATION
The EE99-1 transmitter series can be calibrated in two ways.
-
1 point humidity calibration: quick and simple calibration on a defined humidity point
(working point)
-
2 point humidity calibration: simple calibration for accurate measuring results over the
whole humidity working range.
•
To reach a temperature balance it is recommended to keep the transmitter and the
reference chamber (e.g. HUMOR 20,...) for minimum 4 hours in the same room.
•
During stabilisation period and calibration procedure it is important to keep the
temperature constant in the reference climate chamber.
•
For calibration the humidity sensor probe must be stabilised at least 30 minutes into
the reference chamber.
•
Replace a used dirty filter cap before calibration!
5.1
2 point humidity calibration
For accurate adjustment over the whole working range or in case of sensor exchanges a
two point calibration is recommended.
•
Start calibration at the low humidity calibration point!
•
The humidity difference between the two points should be > 30%RH
Procedure for 2 point humidity calibration
(start at low calibration point)
:
1.
Insert the sensor probe into the reference chamber 1 (low humidity calibration point)
and stabilise for minimum 30 min.
2. PUSHBUTTON S2
: Pressing the button for 3 seconds starts the procedure for the
low calibration point. The calibration mode is indicated by the lit LED "Calib" and by the
symbol "CAL" on the LC display.
3. PUSHBUTTON S1 (up)
and
S2 (down)
: Pressing 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.
4. PUSHBUTTON S1
: Pressing the button for 3 seconds the calibration value is stored
and the procedure is ended. Exiting the calibration mode is indicated by deactivation
of the LED "Calib" and the symbol "CAL" on the LC display.
or PUSHBUTTON S2
: Pressing the button for 3 seconds the calibration procedure will
be ended without storing the calibration values. Exiting the calibration mode is indica-
ted by deactivation of the LED "Calib" and the symbol "CAL" on the LC display.
5.
Insert the sensor probe into the reference chamber 2 (high humidity calibration point)
and stabilise for minimum 30 min.
6. PUSHBUTTON S1
: Pressing the button for 3 seconds starts the procedure for the
high calibration point. The calibration mode is indicated by the lit LED "Calib" and by
the symbol "CAL" on the LC display.
7. PUSHBUTTON S1 (up)
and
S2 (down)
: Pressing 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.
8. PUSHBUTTON S1
: Pressing the button for 3 seconds stores the calibration value
and the procedure is ended. Exiting the calibration mode is indicated by deactivation
of the LED "Calib" and the symbol "CAL" on the LC display.
or PUSHBUTTON S2
: Pressing the button for 3 seconds the calibration procedure will
be ended without storing the calibration values. Exiting the calibration mode is indica-
ted by deactivation of the LED "Calib" and the symbol "CAL" on the LC display.
S1
S2
S1
S2
Calib
S1
S2
S1
S2
S2
S1
Calib
Calib
Calib
low calibration point:
high calibration point:
Summary of Contents for EE99-1 Series
Page 19: ......
