
5.11 Offset
The settings in the OFFSET function group can be used to calibrate the measurement to a reference
measurement. This requires a linear shift of all values measured, i.e. the adjustment is determined
for one measured value, and all others are calculated using the same offset.
Note:
The offset is automatically reset to
zero after calibration.
OFFSET.CDR
Measured value
Time t
Current measured value
Calibrated value
Fig. 5.17 Offset
Coding Field
Selection or range
Factory setting (bold)
Display Info
V
Function group
OFFSET
for pH or redox
Either pH or redox appears
depending on the operating
mode in A1.
V1
Enter desired
value
Current measured
value
pH –2.00 ... 16.00
–1500 ... 1500 mV
0.0 ... 100.0 %
Display can be edited.
V2
Current offset is
displayed
pH 0.00
pH –2.00 ... 2.00
0mV
–120 ... 120 mV
0.0 %
–50.0 ... 50.0 %
V3
Calibration status
is displayed
o.k.
E xxx
V4
Store calibration
result
yes
no
new
If V3 = E xxx, then only
no or new.
If new, return to V.
If yes/no, return to
“Measurement”.
Factory settings are printed in bold face;
base version does not includde functions in
italic.
V
OFFSET
V1
pH
Real PV
0.00
V2
pH
PV Offset
0.00
o.k. V3
Status
yes V4
Store
Instrument configuration Liquisys M CPM 223 / 253
58 Endress+Hauser
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