Absolute Pressure With Front-Flush Diaphragm - Siemens SITRANS P320 Compact Operating Instructions

Absolute pressure measuring limits from
gauge pressure series
• Measuring cell with inert oil
For process temperature
-20 °C < ϑ ≤ 60 °C (-4 °F < ϑ
≤ +140 °F)
For process temperature 60 °C
< ϑ ≤ 100 °C (max. 85 °C for
measuring cell 30 bar) (140 °F
< ϑ ≤ 212 °F (max. 185 °F for
measuring cell 435 psi))
Upper measuring limit
Lower range value
8.1.5

Absolute pressure with front-flush diaphragm

Absolute pressure with front-flush diaphragm
Measurand
Measuring span (continuous‐
ly adjustable) or measuring
range, max. operating pres‐
sure and max. test pressure
1) For devices with functional safety, the minimum permissible measuring span is limited by the
turndown. Therefore, ensure that the configured turndown is no higher than 5:1.
The MAWP value of the pressure transmitter can be lower than the PN value of the mounting
2)
flange and vice versa. To determine the maximum permissible operating pressure and the
maximum permissible test pressure, use the lowest value as reference.
Absolute pressure measuring limits with front-flush dia‐
phragm
Lower measuring limit
• Measuring cell with silicone oil filling
Upper measuring limit
Lower range value
SITRANS P320/P420
Compact Operating Instructions, 09/2021, A5E38874562-AD
30 mbar a/3 kPa a/0.44 psi a
30 mbar a + 20 mbar a • (ϑ - 60 °C)/°C
3 kPa a + 2 kPa a • (ϑ - 60 °C)/°C
0.44 psi a + 0.29 psi a • (ϑ - 140 °F)/°F
100% of max. range (for oxygen measurement: max. 100 bar/10 MPa/1450 psi
and 60 °C ambient temperature/medium temperature)
Between the measuring limits (continuously adjustable)
Absolute pressure
Measuring span
1)
43 ... 1300 mbar a
4.3 ... 130 kPa a
17 ... 525 inH O a
2
166 ... 5000 mbar a
16.6 ... 500 kPa a
2.41 ... 72.5 psi a
1 ... 30 bar a
0.1 ... 3 MPa a
14.5 ... 435 psi a
Depending on the process connection, the measuring span may differ from these values
Maximum permissible
operating pressure MAWP (PS)
Refer to the information on the nameplate of the pressure
transmitter and the data on the mounting flange
0 mbar a/kPa a/psi a
100% of max. range
Between the measuring limits (continuously adjustable)
Technical data
8.1 Input
Maximum test
pressure
2)
67