Calibration
Notice
The units are precalibrated at the factory. They should be reca-
librated (according to the following steps) only when absolutely
necessary.
The existing calibration data is then unredeemable.
As a principle, recalibration means that suitable calibration equip-
ment is available.
1. It must be safeguarded that the controller is correctly adjus-
ted (type of sensor,
°
C/
°
F, resolution, lower-range value,
upper-range value).
2. Switch off the power supply.
3. Instead of sensor, connect a calibration unit to the input ter-
minals (ensure correct polarity!) and generate a calibration
signal which corresponds to the lower calibration value (e.g.
0 mV for 0
°
C).
4. Switch on the power supply.
5. Select the parameter for the lower calibration value
on
the 3rd menu level (see Section on “Parameter definition”).
6. Adjust the displayed value with
and
until this corres-
ponds with the calibration value.
7. Press
for at least 6 s in order to store this value.
8. Select the parameter for the upper calibration value
on
the 3rd menu level (see Section on “Parameter definition”).
9. Generate a calibration signal which corresponds to the upper
calibration value (e.g. 46 mV for 800
°
C).
10. Adjust the displayed value with
and
until this
corresponds to the calibration value.
11. For at least 6 s press
to store this value.
12. Return to the standard level with
.
13. Switch off the power supply.
14. Instead of the calibration unit, connect the sensor to the input
terminal (ensure correct polarity!).
15. Switch on the power supply.
Error messages
Error message
Possible cause
Remedy
sensor break, sensor incorrectly connected
check the sensor connection, exchange sensor
lower-measuring range undershot
check the setting of the parameter
and correct
upper-measuring range overshot
check the setting of the parameter
and correct
analog output is defective
look for external error sources (parasitic pulses),
consult your after-sales service
self-tuning unsuccessful, ON/OFF control configured
(
=0)
repeat the self-tuning,
set unequal to 0
manual operation is not allowed during ON/OFF
control
set unequal to 0
checksum error
check control parameter and re-adjust
Tab. 2
14
Calibration • Error messages
