Maintenance And Cleaning - WIKA OT-1 Manual De Instrucciones

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
EN
4 ... 20 mA, 2-wire
DC 1 ... 6 V, 3-wire
DC 1 ... 5 V, 3-wire
DC 0 ... 10 V, 3-wire
DC 0.5 ... 4.5 V, ratiometric

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".
12
Power supply U
+
DC 8 ... 36 V
DC 9 ... 36 V
DC 8 ... 36 V
DC 14 ... 36 V
DC 5 ±0.5 V
WIKA operating instructions OEM pressure transmitter, model OT-1
Maximum load R in Ω
A
R ≤ (power supply – 8 V)/0.02 A
A
R > 2.5 kΩ
A
R > 2.5 kΩ
A
R > 5 kΩ
A
R > 4.5 kΩ
A