Operation
Liquisys M CPM223/253
66
Hauser
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
C17
Zero point (zero
point / U_is) is
displayed
Glass:
pH 7.00
pH 5.00 ... 9.00
Antimony:
pH 1.00
pH -1.00 ... 3.00
ISFET:
current value
-500 ... +500 mV
For ISFET, the zero point is displayed in mV.
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
C17
pH
Zero
7.00
