Electrical Connection - WIKA F-20 Betriebsanleitung

5. Starting, operation
Remove the protection cap only just before installation and absolutely avoid any damage to the
■
diaphragm during installation as well (F-21).
For Model F-20 you have to provide for a sealing element; exceptions are instruments with
■
self-sealing threads (e.g. NPT thread). For Model F-21 the sealing is included in delivery.
Please refer to our data sheet "Pressure gauge sealing washers AC 09.08" or our website www.wika.de
■
for details about sealing washers.
When mounting the instrument, ensure that the sealing faces of the instrument and the measuring
■
point are clean and undamaged.
Screw in or unscrew the instrument only via the flats using a suitable tool and the prescribed torque.
■
The appropriate torque depends on the dimension of the pressure connection and on the sealing
element used (form/material). Do not use the case as working surface for screwing in or unscrewing
the instrument.
When screwing the transmitter in, ensure that the threads are not jammed.
■
For tapped holes and welding sockets please see Technical Information IN 00.14 for download at
■
www.wika.de

Electrical connection

Connect the instrument to earth via the pressure connection and/or connection terminal 5.
■
For instruments with voltage output or 3 wire current output, use shielded cables, and, if the cables
■
are longer than 30 m or leave the building, earth the shield at least at one end of the cable.
Ensure that the cable diameter you select fits to the cable gland of the connector. Ensure that the
■
cable gland of the mounted connector is positioned correctly and that the sealings are available and
undamaged. Tighten the threaded connection and check the correct position of the sealings in order
to ensure the ingress protection.
Please make sure that the ends of cables with flying leads do not allow any ingress of moisture.
■
WIKA operating instructions pressure transmitters, models F-20, F-21
EN
9