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7. Configuration without display and operating unit
7. Configuration without display and operating unit
7.1 Performing a mounting correction (offset)
The mounting correction corrects a zero point offset in the output signal by defining a new
zero point. The zero point offset is caused by the mounting position.
Correction range: ±20 % of maximum measuring range
Required tool: Multimeter (ammeter)
EN
1. Screw off the case head cover and pull out the push-on cap.
2. Press [Zero] for approx. 2 s (e.g. with measuring tip of a multimeter).
» Mounting correction successful: Control diode lights up for 2 s.
» Mounting correction unsuccessful: Control diode blinks 5 times.
3. Check the output signal as follows.
▶
Set the multimeter to current measurement.
▶
Connect the positive measuring line of the multimeter to the test contact.
▶
Connect the negative measuring line of the multimeter to the negative power
supply terminal.
» The result of the current measurement should give a value between 4 ... 20 mA
in the pressure-free condition. If the ambient atmospheric pressure is outside
the measuring range, the measured current can be < 4 mA or > 20mA.
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CAUTION!
Incorrect connection
A short-circuit will destroy the process transmitter.
▶
Ensure that the multimeter does not come into contact with the
positive power supply terminal.
Control diode
Mounting correction, [Zero] key
Test contact
Positive power supply terminal +
Negative power supply terminal –
WIKA operating instructions, model DMSU22SA
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