Electrical Connection - WIKA DELTA-plus DPG40 Betriebsanleitung

6. Commissioning, operation
Measuring assemblies
The preferred measuring assemblies for various possible applications are speci-
fied in DIN 19216.
The following illustration of the principle shows a recommended assembly for
liquid media. As throttling devices, differential pressure transducers should be
provided in accordance with DIN 1952 (issue 07.82), now replaced by EN 5167/1.
EN
The differential pressure lines must be made from metal, their bore must not be
less than 4 mm and the effective length between the valve manifold and the diffe-
rential pressure gauge must be at least 500 mm.
In addition, the length and the bore of
the pressure lines should be such that,
with cold lines, the response time of the
differential pressure gauge is not more
than 5 seconds.
The connections of the differential
pressure lines must be welded,
brazed or screwed using metal sealing
elements.
Shut-off devices in differential pressure
lines must only be operated using tools.

6.2 Electrical connection

(applies to models DELTA-comb and DELTA-switch)
The electrical connection must only be made by qualified skilled personnel.
■
Pin assignment and switching functions are given on the product label on
■
the instrument. Connection terminals and ground terminal are appropriately
marked.
The mains connection lines to be provided must be dimensioned for maximum
■
current supply of the instrument and comply with IEC 227 or IEC 245.
The instruments must be connected to the equipotential bonding of the plant.
■
Performance data (see chapter 3 "Specifications")
22 WIKA operating instructions DELTA-plus, DELTA-comb and DELTA-switch
Differential pressure
transducer
(throttling device in the
process line)
Differential pressure
line
Shut-off devices
(valve manifold)
Differential pressure gauge
(DELTA-plus, DELTA-comb
or DELTA-switch)