Wika OT-1 Manuel d'utilisateur télécharger pdf (Page 12)

12 WIKA operating instructions OEM pressure transmitter, model OT-1

2127027.02 09/2013 GB/D/F/E

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

inΩ

4 ... 20 mA, 2-wire DC 8 ... 36 V R

≤ (power supply – 8 V) / 0.02 A

DC 1 ... 6 V, 3-wire DC 9 ... 36 V R

> 2.5 kΩ

DC 1 ... 5 V, 3-wire DC 8 ... 36 V R

> 2.5 kΩ

DC 0 ... 10 V, 3-wire DC 14 ... 36 V R

> 5 kΩ

DC 0.5 ... 4.5 V, ratiometric DC 5 ± 0.5 V R

> 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 o 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 sucient 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”.

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Wika OT-1 Manuel d'utilisateur Page 12