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Operation
Coding
Field
CALIBRATION
C (1)
function group
Enter calibration
C11
temperature
Enter pH value of
C12
the first buffer
solution
Insert the electrode into the buffer indicated. In the case of ATC
operation, the temperature sensor must also be immersed in the buffer
solution. Then start the calibration with CAL. The current measured
value is displayed.
1. Manual continuation: if the value becomes stable, you can accept
the calibration for buffer solution 1 with the CAL key.
2. Automatic continuation: takes place if the value is stable
(difference between measured values ≤ 0.05 and constant value
over 10 s). If the value does not stabilise within 5 min, error 44 is
set and the calibration is aborted.
Calibration is
C13
performed
Enter pH value of
C14
the second buffer
solution
Calibration is
C15
performed
C16
Slope is displayed
60
Setting range
Display
(Factory settings, bold)
Calibration pH
25.0 C
-50.0 ... 150.0 C
Buffer value of the last
calibration
pH 0.00 ... 14.00
Buffer value of the last
calibration
pH 0.00 ... 14.00
Proceed with buffer 2 as with buffer 1.
Glass: 59.16 mV/pH
38.00 ... 65.00 mV/pH
Antimony: 59.16 mV/pH
25.00 ... 65.00 mV/pH
ISFET: 59.16 mV/pH
38.00 ... 65.00 mV/pH
Info
Only for A1 = pH.
Calibration with two different buffer
C
solutions.
CALIBRAT
25.0
°C
Only for B1 = MTC.
C11
MTC temp.
You can edit the displayed value. The
7.00
pH
value is given by the corresponding
C12
buffer solution.
Buffer 1
In the case of symmetrical
measuring operation, the potential
matching pin must also be immersed
in the buffer.
Stability check:
pH
7.00
The value is accepted in the event of
C13
stability ≤ ±pH 0.05 for more than 10 s.
Buffer 1
The buffer must have another pH value
4.00
pH
than buffer 1.
C14
A plausibility check takes place.
Buffer 2
4.00
pH
Accepted in the event of stability
C15
≤ ±pH 0.05 for more than 10 s.
Buffer 2
59.16
mV/pH
C16
Slope
OPM223/253
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