ProMinent DULCOMETER diaLog DACb Assembly And Operating Instruction page 96

Calibration
Measuring and control behaviour
of the controller during calibration
During calibration the actuating outputs
are deactivated. Exception: a basic
load or a manual control variable has
been set. This remains active. The
measured value output
[standard signal output mA] is frozen,
corresponding to its settings in the mA
output menu.
When calibration/testing has been com‐
pleted successfully, all of the error
checks relating to the measured value
are restarted. The controller saves all
the determined data for zero point and
slope upon a successful calibration.
Buffer used
Dispose of the used buffer solution. For
more information: refer to the buffer sol‐
ution safety data sheet.
You need one test container with a buffer solu‐
tion for calibration.
Continuous display ➨
CAL ORP
Offset
Last calibration
CAL setup
Calibration process
Pot. equalisation
continue with <CAL>
96
0.0 mV
13:26:11
11/04/2013
1 point
No
A1027
Fig. 48: 1-point calibration of ORP sensor
(CAL)
1. Continue with
CAL ORP
Immerse sensor in buffer
continue with <CAL>
Fig. 49: 1-point calibration of ORP sensor
(CAL)
2. Carry out the instructions and then
press
Calibration is running
ð
[Please wait!] flashes.
CAL ORP
Sensor calibration in buffer
Sensor voltage
The stability is:
acceptable
continue with <CAL>
Fig. 50: Display of the sensor stability achieved
[acceptable / good / very good]
3. The
range is displayed
The black part of the horizontal bar
ð
indicates the range detected.
4. Continue with
A1028
.
0.1 mV
good very good
A1029