12
Product Calibration (pH)
Calibration by sampling (one-point calibration).
During product calibration the sensor remains in the process.
The measurement process is only interrupted briefl y.
Procedure:
1) The sample is measured in the lab or directly on the site using a por-
table meter. To ensure an exact calibration, the sample temperature
must correspond to the measured process temperature.
During sampling the device saves the currently measured value and
then returns to measuring mode. The “calibration“ mode indicator
blinks.
2) In the second step you enter the measured sample value in the
device. From the diff erence between the stored measured value and
entered sample value, the device calculates the new asymmetry
potential.
If the sample is invalid, you can take over the value stored during
sampling. In that case the old calibration values are stored.
Afterwards, you can start a new product calibration.
Display
Action
Remark
Select product
calibration.
Press enter to proceed.
If an invalid code is
entered, the device
returns to measur-
ing mode.
Ready for calibration.
Hourglass blinks.
Select calibration
method: P_CAL
Press enter to proceed.
Display (3 sec)
Now the device is in
HOLD mode.
Take sample and save
value.
Press enter to proceed.
Now the sample can
be measured in the
lab.
