10 x 1.6
100
061744 09/
009 GB/D/F/E
GB
WIKA Testing Instructions for Pressure Gauges
8
4. Testing for transmitters / 5. Repairs
4. Testing for transmitters
Transmitter versions
Standard
Model 891.34
Ex-version Model 89.34
The design and construction of the transmitters and their function is described
in Data Sheet AC 08.0 "Transmitters to combine with pressure gauges" and
the operating instructions are included with the instrument.
Connection details
-wire 4 ... 0 mA
Clip 1: Earth power supply / earth signal
Clip : Power supply 10 ... 30 V / plus signal
Clip 3: Test minus
Clip 4: Test plus
3-wire 0 ... 0 mA
Clip 1: Earth power supply / earth signal
Clip : Power supply 14 ... 30 V
Clip 3: Test plus
Clip 4: Signal plus / test minus
Accuracy of the output signal
The accuracy of the output signal is stated with reference to the measuring
span, e.g.:
Output signal: 0 ... 0 mA
Measuring span: 0 mA
Output signal: 4 ... 0 mA
Measuring span: 16 mA
For the permissible error limits the accuracy class of the base instrument
applies, e.g.:
Base instrument: Class 1.5
Permissible deviation: ±1.6 %
Output signal:
4 ... 0 mA Measuring span:
16 mA
Permissible deviation of the output signal:
= ± 0.256 mA
Please note:
With regard to the measuring error the transmitter should always to be consi-
dered separately, i.e. the measurement error of the output signal must always
be separately tested in comparison with the reference standard.
5. Repairs
Repairs are only to be carried out by the manufacturer or appropriately trained
personnel.