Endress+Hauser Liquisys M CPM253 User Manual

Commissioning Liquisys M CPM223/253
78 Endress+Hauser
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 the measured values, i.e. the
adjustment is determined
for one measured value, and all others are calculated using the same adjustment.
C07-CPM2x3xx-05-06-00-xx-005.eps
Fig. 45: Offset
XTime
YMeasured value
A Calibrated value
B Current measured value
Following a calibration, the offset is automatically set to zero.
Y
X
A
B
Coding Field Setting range
(Factory settings, bold)
Display Info
V
OFFSET function
group for pH or ORP
Depending on the operating mode
selected, either pH or ORP appears (i.e. no
direct selection can be made)
V1
Enter desired
measured value
Current measured value
pH -2.00 to 16.00
-1500 to 1500 mV
0.0 to 100.0 %
You can edit the display.
The entry can differ from the actual value
by max. ±2.0 pH / ±120 mV / ±50 %.
V2
Current offset is
displayed
pH 0.00
pH -2.00 to 2.00
0mV
-120 to 120 mV
0.0 %
-50.0 to 50.0 %
V3
Calibration status is
displayed
Display:
o.k. or error code
Press CAL.
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".
V
OFFSET
V1
pH
Real PV
0.00
V2
pH
PV Offset
0.00
V3
Status
o.k.
V4
Store
yes

Endress+Hauser Liquisys M CPM253 Specifications

General

Brand	Endress+Hauser
Model	Liquisys M CPM253
Category	Transmitter
Language	English