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WIKA operating instructions OEM pressure transmitter, model OT-1
2127027.02 09/2013 GB/D/F/E
GB
6. Commissioning, operation / 7. Maintenance and cleaning
6.2.3 Setting up a voltage supply
The permissible power supply depends on the corresponding output signal.
Output signal
Power supply U
+
Maximum load R
A
in Ω
4 ... 20 mA, 2-wire
DC 8 ... 36 V
R
A
≤ (power supply – 8 V) / 0.02 A
DC 1 ... 6 V, 3-wire
DC 9 ... 36 V
R
A
> 2.5 kΩ
DC 1 ... 5 V, 3-wire
DC 8 ... 36 V
R
A
> 2.5 kΩ
DC 0 ... 10 V, 3-wire
DC 14 ... 36 V
R
A
> 5 kΩ
DC 0.5 ... 4.5 V, ratiometric
DC 5 ± 0.5 V
R
A
> 4.5 kΩ
7. Maintenance and cleaning
7.1 Maintenance
This pressure transmitter is maintenance-free.
Repairs must only be carried out by the manufacturer.
7.2 Cleaning
CAUTION!
■
Before cleaning, correctly disconnect the pressure transmitter from the pressure supply, switch it off and
disconnect it from the power supply.
■
Electrical connections must not come into contact with moisture.
■
Wash or clean the dismounted instrument before returning it, in order to protect persons and the
environment from exposure to residual media.
■
Residual media in dismounted pressure transmitters can result in a risk to persons, the environment and
equipment. Take sufficient precautionary measures.
■
Do not use any pointed or hard objects for cleaning, as they may damage the diaphragm of the process
connection.
For information on returning the instrument see chapter 9.2 “Return”.
