6 Commissioning
TopCal S CPC 300
104
EHauser
Calibration
redox relative
"50 % turnover point"
The 50 % turnover point must be known (e.g. through titration of the toxic solution). It is
used as the buffer of a sample at this turnover point.
CODE
CHOICE
(default = bold)
INFO
CC
Calibration with
50 % turnover point
Note in display
Display of the type of on-site calibration selected in the
calibration settings.
CCE1
Immerse:
Electrode in buffer
Handling instructions
Immerse the electrode in buffer (sample at 50 %
turnover point, see above).
Confirm by pressing
F
CCE2
20 %
(0 ... 30 %)
Enter buffer
Enter the relative redox value of buffer 1 (detoxified sam-
ple) in percent.
CCE3
Time: 10 s
mV 1:
225
Checks the stability of the calibration
Wait until the measurement is stable:
Time does not count down,
mV value no longer flashes,
Display "Measured value stable"
Confirm by pressing
F
CCE4 / CCE5
50 % voltage
20 %
80 %
-500 mV
0395 mV
-0500 mV
Note in display:
Info on electrode
Data on the voltage sequence on the calibration curve.
CCE6
Invalid calibration value
Note in display:
Error message if the entered offset is too large.
CCE7
Accept
Reject
Recalibrate
End of calibration
Accept
: Pressing
F
accepts the new calibration data.
Reject
: The data is not accepted, a recalibration won’t be
started.
Recalibrate
: The data is rejected and a new calibration
will be started.
CCE8
Electrode in medium?
Note in display:
If the electrode is back in the medium, so that measure-
ment can take place?
