10.9 Calibrating temperature
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.
You may need a manual measuring instrument
for the temperature measured variable. This
manual instrument should measure and display
sufficiently accurately to guarantee successful
calibration.
1. Press in the continuous display.
2. Then press
3. Follow the instructions in the controller
display and perform calibration
4. Then press
5. Then press to adjust the value or
press to continue with calibration
6. Import the result of the calibration into
the controller memory by pressing
ð
The controller shows the contin‐
uous display again and operates
with the results of the calibration.
Incorrect calibration
An error message appears
if the result of the calibra‐
tion lies outside the speci‐
fied tolerance limits. In this
case the current calibration
is not carried over.
Check the prerequisites for
calibration and eliminate
the error. Then repeat cali‐
bration.
Calibration
120
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