Proline Promass E 300 Modbus RS485
Technical data
Hauser
185
Dependency of ambient temperature on medium temperature
T
a
T
m
B
A
A0031121
33
Exemplary representation, values in the table below.
T
a
Ambient temperature range
T
m
Medium temperature
A
Maximum permitted medium temperature T
m
at T
a max
= 60 °C (140 °F); higher medium temperatures T
m
require a reduced ambient temperature T
a
B
Maximum permitted ambient temperature T
a
for the maximum specified medium temperature T
m
of the
sensor
Values for devices used in the hazardous area:
Separate Ex documentation (XA) for the device → 198.
Not insulated
Insulated
A
B
A
B
T
a
T
m
T
a
T
m
T
a
T
m
T
a
T
m
60 °C (140 °F)
150 °C (302 °F)
–
–
60 °C (140 °F)
110 °C (230 °F)
55 °C (131 °F)
150 °C (302 °F)
Density
0 to 5
000 kg/m
3
(0 to 312 lb/cf)
Pressure-temperature
ratings
An overview of the pressure-temperature ratings for the process connections is
provided in the "Technical Information" document
Sensor housing
The sensor housing is filled with dry nitrogen gas and protects the electronics and
mechanics inside.
If a measuring tube fails (e.g. due to process characteristics like corrosive or abrasive
fluids), the fluid will initially be contained by the sensor housing.
In the event of a tube failure, the pressure level inside the sensor housing will rise
according to the operating process pressure. If the user judges that the sensor housing
burst pressure does not provide an adequate safety margin, the device can be fitted with a
rupture disk. This prevents excessively high pressure from forming inside the sensor
housing. Therefore, the use of a rupture disk is strongly recommended in applications
involving high gas pressures, and particularly in applications in which the process pressure
is greater than 2/3 of the sensor housing burst pressure.
Burst pressure of the sensor housing
