Testing For Transmitters; Repairs - WIKA 811 Instrucciones

4. Testing for transmitters / 5. Repairs

4. Testing for transmitters

Transmitter versions
Standard

Ex-version Model 89.34
GB 
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:
Output signal:
For the permissible error limits the accuracy class of the base instrument
applies, e.g.:
Base instrument: Class 1.5
Output signal:
Permissible deviation of the output signal:
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.
8
Model 891.34
0 ... 0 mA
4 ... 0 mA
Permissible deviation: ±1.6 %
4 ... 0 mA Measuring span:
Measuring span: 0 mA
Measuring span: 16 mA
10 x 1.6
100
WIKA Testing Instructions for Pressure Gauges
16 mA
= ± 0.256 mA