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6. Commissioning, operation
Measuring assemblies
The preferred measuring assemblies for various possible applications are
specified in DIN 19216.
The following schematic diagram 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.
Ensure that the differential pressure lines are made of metal, that the bore is not
less than 4 mm and the effective length between the valve manifold and the differ-
ential pressure measuring instrument is at least 500 mm.
The length and the bore of the differential
pressure lines are to be dimensioned
in such a way that, on cold lines, the
response time of the effective pressure
measuring instrument is not more than 5
seconds.
Ensure that the connections of the
differential pressure lines are welded,
brazed or screwed using metal sealing
elements.
The only way to actuate the shut-off
devices in differential pressure lines is
with tools.
6.2 Electrical connection
The electrical connection must only be made by qualified skilled personnel.
■
Connection details and switching functions are given on the product label.
■
Connection terminals are appropriately marked.
Rate mains connection cables for the maximum current consumption of the
■
appliance and comply with the specifications of IEC 227 or IEC 245.
Include instruments in the equipotential bonding of the plant.
■
For performance data, see chapter 3 "Specifications"
WIKA operating instructions DPGS40TA with component testing
Differential pressure
transducer
(throttling device in the
process line)
Differential pressure
line
Shut-off valves
(valve manifold)
Differential pressure
measuring instrument
DPGS40TA
EN
25
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