Wika DPGT40 Uživatelský manuál stáhnout pdf (Strana 15)

WIKA operating instructions dierential pressure transmitter, model DPGT40 15

14093267.01 03/2014 GB/D/F/E

Measuring assemblies

The preferred measuring assemblies for various possible applications are

specied in DIN 19216.

The following schematic diagram shows a recommended assembly for liquid

media. As throttling devices, dierential pressure transducers should be provided

in accordance with DIN 1952 (issue 07.82), now replaced by EN 5167/1.

The dierential pressure lines must be made from metal, their bore must not

be less than 4 mm and the eective length between the valve manifold and the

dierential pressure transmitter must be at least 500 mm.

Dierential pressure

transducer

(throttling device in the

process line)

Dierential pressure

instrument

(DELTA-trans)

Shut-o valves

(valve manifold)

Dierential pressure

line

6. Commissioning, operation

In addition, the length and the bore of

the pressure lines should be such that,

with cold lines, the response time of

the pressure gauge is not more than

5 seconds.

The connections of the dierential

pressure lines must be welded, brazed or

screwed using metal sealing elements.

Shut-o valves in dierential pressure

lines must only be operated using tools.

Safety instructions for installation

■

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.

■

The instruments do not provide for incorporated overcurrent protectors!

Once the pressure connection and the electrical connections have been made,

the pressure transmitters are ready for immediate use.

Commissioning

During the commissioning process pressure surges must be avoided at all costs.

Open the shut-o valves slowly.

1 2 ... 10 11 12 13 14 15 16 17 18 19 20 ... 75 76

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