10.2 Calibrating the ORP
Sensor
10.2.1 Selecting the calibration
process for ORP
Selecting the calibration process
There are two calibration processes available
for calibrating the controller:
n 1-point (with buffer solution)
n Data input
1. Continuous display ➨
CAL ORP
Pot. equalisation
Calibration process
A1027
No
0.0 mV
Offset
Last calibration
CAL setup
13:26:11
11/04/2013
continue with <CAL>
1 point
Fig. 47: [ORP] calibration menu
ð
The calibration menu is displayed.
2. Use to select the Setup menu or start
calibration by pressing
Selecting the calibration process
3.
[CAL Setup]
: Press
ð
The menu for selecting the calibra‐
tion process appears.
4. Using the arrow keys select the required
menu item
[Calibration process]
and
press
ð
The input window appears.
5. Use the arrow keys to select the calibra‐
tion process and press
6. Continue with
ð
You can now start your chosen cali‐
bration process.
10.2.2 1-point calibration of ORP
sensor (CAL)
Correct sensor operation
–
Correct measuring and metering is
only possible if the sensor is
working perfectly
–
Refer to the sensor's operating
instructions
–
Remove the sensor from the in-
line probe housing and re-fit it for
calibration. To do this, refer to the
operating instructions for your in-
line probe housing
ORP sensor calibration
The ORP sensor cannot be calibrated.
Only an [OFFSET] deviation of magni‐
tude ± 40 mV can be set and thus com‐
pensated. If the ORP sensor deviates
by more than ± 40 mV from the refer‐
ence value, then it must be checked in
accordance with the requirements of
the sensor operating instructions.
Calibration
95