Siemens P technical specifications Measuring setups with remote seals, 183

Models: P

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© Siemens AG 2008

SITRANS P measuring instruments for pressure

Remote seals

Measuring setups with remote seals

Dimensional drawings

Types of installation for pressure and level measurements (open vessels)

Installation type A

DH

HO

HU

H1

Installation type B

DH

HO

HU

H1

Installation type A

2

Start-of-scale:

pMA = rFL · g · HU - rOil · g · H1

Full-scale:

pME = rFL · g · HO - rOil · g · H1

 

Installation type B

 

Start-of-scale: pMA = rFL · g · HU + rOil · g · H1

 

 

Full-scale:

pME = rFL · g · HO + rOil · g · H1

 

Legend

 

 

pMA

Start-of-scale value to be set

 

pME

Full-scale value to be set

 

rFL

Density of medium in vessel

 

rOil

Density of filling oil in the capillary to

 

 

the remote seal

 

gLocal acceleration due to gravity

Pressure transmitter

Pressure transmitter

above the measuring point

below the measuring point

H1 £ 7 m (23 ft), with halocarbon oil as filling liquid only H1 £ 4 m (13.1 ft)

HU

Start-of-scale value

HO

Full-scale value

H1

Distance between vessel flange and pressure trans.

Types of installation for absolute level measurements (closed vessels)

Installation type C1

Installation type C2

Installation type C1 and C2

H 1

p abs

 

p abs

 

H 1

Start-of-scale: Full-scale:

Legend

pMA pME

pSTART pEND rOil

g H1

pMA = pSTART + rOil · g · H1

pME = pEND + rOil · g · H1

Start-of-scale value to be set Full-scale value to be set Start-of-scale value Full-scale value

Density of filling oil in the capillary to the remote seal

Local acceleration due to gravity

Distance between vessel flange and pressure trans.

Pressure transmitter for absolute pressure always below the measuring point: H1 ³ 200 mm (7.9 inch)

Type of installation for differential pressure and flow measurements

Installation type D

Filter monitoring

Installation type D

H 1

H V

H 2

 

Start-of-scale: Full-scale:

Legend

pMA pME

pSTART pEND rOil

g

HV

pMA = pSTART - rOil · g · HV

pME = pEND - rOil · g · HV

Start-of-scale value to be set Full-scale value to be set Start-of-scale value Full-scale value

Density of filling oil in the capillary to the remote seal

Local acceleration due to gravity

Distance between the measuring points (spigots)

Siemens FI 01 · 2009

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Page 183
Image 183
Siemens P technical specifications Measuring setups with remote seals, 183