WIKA DELTA-trans DPGT40 Betriebsanleitung Seite 15

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.
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
differential pressure measuring instrument 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 instrument 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 valves in differential pressure
lines must only be operated using tools.
Safety instructions for installation
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The instruments do not provide for incorporated overcurrent protectors!
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Once the pressure connection and the electrical connections have been made,
the pressure gauges are ready for immediate use.
Commissioning
During the commissioning process pressure surges must be avoided at all costs.
Open the shut-off valves slowly.
WIKA operating instructions differential pressure gauge, model DPGT40
Follow the installation and safety instructions within the
operating instructions.
Install instruments in accordance with the manufacturer's
instructions and the valid standards and regulations.
Differential pressure
transducer
(throttling device in the
process line)
Differential pressure
line
Shut-off valves
(valve manifold)
Differential pressure
instrument
(DELTA-trans)
EN
15