Gauge Pressure With Front-Flush Diaphragm - Siemens SITRANS P Operating Instructions Manual

Technical data
13.1 Input
Gauge pressure measuring limits
● Measuring cell with inert oil
● Measuring cell with FDA-compliant oil
Upper measuring limit
Lower range value
For devices with functional safety, the minimum permissible measuring span is limited by the
1)
spread. Therefore, ensure that the configured spread is no higher than 5:1.
For 250 mbar/25 kPa/3.6 psi measuring cells, the low measuring limit is 750 mbar a/75 kPa a/
2)
10.8 psi a. The measuring cell is vacuum-tight down to 30 mbar a/3 kPa a/0.44 psi a.
13.1.2

Gauge pressure with front-flush diaphragm

Gauge pressure input with front-flush diaphragm
Measured variable
Measuring span (continuous‐
ly adjustable) or measuring
range, max. operating pres‐
sure and max. test pressure
For devices with functional safety, the minimum permissible measuring span is limited by the
1)
spread. Therefore, ensure that the configured spread 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.
Gauge pressure measuring limits with front-flush diaphragm
Lower measuring limit
● Measuring cell with silicone oil filling
● Measuring cell with inert oil
200
30 mbar a/3 kPa a/0.44 psi a
100 mbar a/10 kPa a/1.45 psi a
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)
Gauge pressure
Measuring span
1)
0.01 ... 1 bar
1 ... 100 kPa
0.15 ... 14.5 psi
0.04 ... 4 bar
4 ... 400 kPa
0.58 ... 58 psi
0.16 ... 16 bar
0.016 ... 1.6 MPa
2.3 ... 232 psi
0.6 ... 63 bar
0.063 ... 6.3 MPa
9.1 ... 914 psi
Maximum permissible
operating pressure MAWP
(PS)
Refer to the information on the nameplate of the pressure
transmitter and the data on the mounting flange
100 mbar a/10 kPa a/1.45 psi a
100 mbar a/10 kPa a/1.45 psi a
SITRANS P320/P420 with 4 to 20 mA/HART
Operating Instructions, 11/2019, A5E44852162-AC
Maximum test
pressure
2)