Sitrans p measuring instruments for pressure, Remote seals for transmitters and pressure gages, Technical description 2/155 – Siemens SITRANS P User Manual
Page 155
SITRANS P measuring instruments for pressure
Remote seals for transmitters and pressure gages
Technical description
2/155
Siemens FI 01 · 2009
2
Temperature error Clamp-on seals
Temperature errors of clamp-on seals when connected to pressure transmitters for pressure and absolute pressure, and with single-
sided connection to pressure transmitters for differential pressure
Temperature errors of clamp-on seals with double-sided connection to pressure transmitters for differential pressure
Remarks:
• Values apply for the filling liquids silicone oil M5, silicone oil M50, high-temperature oil, halocarbon oil and food oil (FDA listed).
• Half the values apply to glycerin/water mixture as the filling liquid.
• Values apply to stainless steel as the diaphragm material.
• Diaphragm thickness 0.05 mm (0.002 inch) for DN 25/DN 40/DN 50 and 0.1 mm (0.004 inch) for DN 80/DN 100
Nominal diameter/
design
Temperature error of remote
seal
Temperature error of
capillary
Temperature error of pro-
cess flange/connection
spigot
Recommended min. spans
(guidance values, observe
temperature error)
mbar/10 K
(psi/10 K)
mbar/10 K
(psi/10 K)
mbar/10 K
(psi/10 K)
mbar
(psi)
DN 25 (1 inch)
6.0
(0.0870)
8.5
(0.123)
8.5
(0.123)
1000
(14.5)
DN 40 (1½ inch)
4.5
(0.065)
4.5
(0.065)
4.5
(0.065)
250
(3.63)
DN 50 (2 inch)
4.0
(0.058)
3.0
(0.044)
3.0
(0.044)
100
(1.45)
DN 80 (3 inch)
9.5
(0.138)
5.0
(0.073)
5.0
(0.073)
100
(1.45)
DN 100 (4 inch)
8.0
(0.012)
3.0
(0.044)
3.0
(0.044)
100
(1.45)
Nominal diameter/
design
Temperature error of remote
seal
Temperature error of
capillary
Temperature error of pro-
cess flange/connection
spigot
Recommended min. spans
(guidance values, observe
temperature error)
mbar/10 K
(psi/10 K)
mbar/10 K
(psi/10 K)
mbar/10 K
(psi/10 K)
mbar
(psi)
DN 25 (1 inch)
2.3
(0.033)
1.8
(0.026)
1.8
(0.026)
1000
(14.5)
DN 40 (1½ inch)
0.8
(0.012)
0.3
(0.004)
0.3
(0.004)
250
(3.63)
DN 50 (2 inch)
0.3
(0.004)
0.1
(0.002)
0.1
(0.002)
100
(1.45)
DN 80 (3 inch)
3.0
(0.044)
0.5
(0.007)
0.5
(0.007)
100
(1.45)
DN 100 (4 inch)
1.0
(0.015)
0.1
(0.002)
0.1
(0.002)
100
(1.45)
© Siemens AG 2008