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15.1.6
Measured value [mA general] calibration
15.1.7
Calibrating Conductivity
CAL O2
Calibration not possible
Slope
Before calibration
After calibration
A
Zero point
Cancel with <ESC>
Fig. 78: Unsuccessful calibration
7.
Use CAL to end
n
Press ESC to cancel
n
8.
Check the sensor and installation once again and repeat the
calibration procedure.
Measured value [mA general] calibration
The measured value [mA general] cannot be cali‐
brated, this menu item is shown 'greyed out' and
has no purpose.
[mA]
Measuring and control behaviour of the controller
during calibration
During calibration the actuating outputs are deacti‐
vated. 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 completed suc‐
cessfully, 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.
You may need a manual measuring instrument for the conductivity
measured variable. This manual instrument should measure and
display sufficiently accurately to guarantee successful calibration.
1.
Press
in the continuous display.
2.
Use the arrow keys to select
3.
Continue with
.
4.
Follow the instructions in the controller display and perform
calibration.
Calibrating the controller diaLog DACb
---
End with <CAL>
[Slope calibration] .
i
A2855
107
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