
Coding Field
Selection or range
Factory setting (bold)
Display Info
C25
Store calibration
result?
yes
no
new
If C24 = E xxx, then only
no or new.
If new, return to C.
If yes/no, return to
“Measurement”.
The electrode can now be installed into the process again.
C (3)
Function group
CALIBRATION:
Calibration for
redox %
Calibration
Redox %
Only at A1 = ORP (%).
For calibration, a medium sample is drawn and place in two
buckets. The contents of the first bucket are detoxicated. The
contents of the second bucket remains unchanged. A relative
value of 80 % is enterd for the “toxic” sample. The “non-toxic”
sample is used for a relative value 20 %.
Default values:
0 % = –1000 mV
100 % = +1000 mV
C31
Determine 80%
value of the
“toxic” sample
80%
0 ... 100%
Start the calibration with the
“toxic” sample by pressing the
CAL key. The value is accepted,
as soon as it is stable or is
confirmed with the CAL key (see
pH calibration).
C32
Calibration is
performed
mV value is displayed
Acceptance when stability is
reached: ≤ ±pH 0.05 for more
than 10 s.
C33
Determine 20 %
value of “non-
toxic” sample
80%
0 ... 100%
The procedure started in C31 is
repeated with the “non-toxic”
sample to calibrate value 2.
C34
Calibration is
performed
mV value is displayed
Acceptance when stability is
reached: ≤ ±pH 0.05 for more
than 10 s.
C35
Calibration status
is displayed
o.k.
E xxx
C36
Store calibration
result
yes
no
new
If C35 = E xxx, then only
no or new.
If new, return to C.
If yes/no, return to
“Measurement”.
The electrode can now be installed into the process again.
Factory settings are printed in bold face;
base version does not include functions in
italic.
yes C25
Store
C
CALIBRAT
80 C31
Sample 1
%
200 C32
CAL 80%
mV
20 C33
Sample 2
%
50 C34
CAL 20%
mV
o.k. C35
Status
yes C36
Store
Instrument configuration Liquisys M CPM 223 / 253
56 Endress+Hauser
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