OEM OPM223, Operating Instructions Manual

Page: 60 / 104

Operation OPM223/253
60
Coding Field Setting range
(Factory settings, bold) Display Info
C (1)
CALIBRATION
function group
Calibration pH
Only for A1 = pH.
Calibration with two different buffer
solutions.
C11
Enter calibration
temperature 25.0 C
-50.0 ... 150.0 C
Only for B1 = MTC.
C12
Enter pH value of
the first buffer
solution Buffer value of the last
calibration
pH 0.00 ... 14.00
You can edit the displayed value. The
value is given by the corresponding
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.
In the case of symmetrical
measuring operation, the potential
matching pin must also be immersed
in the buffer.
C13
Calibration is
performed
Stability check:
The value is accepted in the event of
stability
≤
±pH 0.05 for more than 10 s.
C14
Enter pH value of
the second buffer
solution Buffer value of the last
calibration
pH 0.00 ... 14.00
The buffer must have another pH value
than buffer 1.
A plausibility check takes place.
Proceed with buffer 2 as with buffer 1.
C15
Calibration is
performed Accepted in the event of stability
≤
±pH 0.05 for more than 10 s.
C16 Slope is displayed
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
C
CALIBRAT
C11
°C
MTC temp .
25 . 0
C12
pH
Buffer 1
7 . 00
C13
pH
Buffer 1
7 . 00
C14
pH
Buffer 2
4 . 00
C15
pH
Buffer 2
4 . 00
C16
mV / pH
Slope
59 . 16