Proline Promass F 500 Modbus RS485 Technical data
Endress+Hauser 197
Pressure-temperature
ratings
An overview of the pressure-temperature ratings for the process connections is
provided in the "Technical Information" document
Secondary containment
pressure rating
The sensor housing is filled with dry inert gas and protects the electronics and mechanics
inside.
The following secondary containment pressure rating is only valid for a fully welded sensor
housing and/or a device equipped with closed purge connections (never opened/as
delivered).
DN Secondary containment
pressure rating
(designed with a safety factor
≥ 4)
Secondary containment burst pressure
[mm] [in] [bar] [psi] [bar] [psi]
8 ³⁄₈ 40 580 255 3 698
15 ½ 40 580 200 2 900
25 1 40 580 280 4 060
40 1½ 40 580 180 2 610
50 2 40 580 195 2 828
80 3 25 362 105 1 522
100 4 16 232 85 1 232
150 6 16 232 80 1 160
250 10 10 145 57 826
If there is a risk of the measuring tube breaking due to process characteristics, e.g. in
the case of corrosive fluids, we recommend the use of sensors whose secondary
containment is equipped with special "pressure monitoring connections" (order code
for "Sensor option", option CH "purge connection").
With the help of these connections, the fluid collected in the secondary containment
can be bled off in the event of tube failure. This is especially important in high-
pressure gas applications. These connections can also be used for gas purging (gas
detection).
Do not open the purge connections unless the containment can be filled immediately
with a dry, inert gas. Use only low gauge pressure to purge. Maximum pressure: 5 bar
(72.5 psi).
If a device fitted with purge connections is connected to the purge system, the
maximum nominal pressure is determined by the purge system itself or by the device,
depending on which component has the lower nominal pressure.
If, on the other hand, the device is fitted with a rupture disk, the rupture disk is
decisive for the maximum nominal pressure → 197.
For information on the dimensions: see the "Mechanical construction" section of the
"Technical Information" document
Rupture disk To increase the level of safety, a device version with a rupture disk with a trigger pressure
of 10 to 15 bar (145 to 217.5 psi) can be used (order code for "Sensor option", option CA
"rupture disk").
Rupture disks cannot be combined with the separately available heating jacket .
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