Endress+Hauser HART Proline Promass E 200 Operating Instructions Manual page 20

Mounting
20
For this reason, the following mounting locations are recommended:
• At the lowest point in a vertical pipe
• Downstream from pumps (no danger of vacuum)
Thermal insulation
For some fluids, it is important to keep the radiated heat from the sensor to the transmitter to a
minimum. A wide range of materials can be used to provide the required thermal insulation.
NOTICE
Electronics overheating on account of thermal insulation!
Observe maximum permitted insulation height of the transmitter neck so that the transmitter
►
head is completely free.
Heating
NOTICE
Electronics can overheat due to elevated ambient temperature!
Observe maximum permitted ambient temperature for the transmitter (® ä 19).
►
Depending on the fluid temperature, take the device orientation requirements into account
►
(® ä 18).
Heating options
If a fluid requires that no heat loss should occur at the sensor, users can avail of the following heating
options:
• Electrical heating, e.g. with electric band heaters
• Via pipes carrying hot water or steam
• Via heating jackets
Using an electrical trace heating system
If heating is regulated via phase angle control or pulse packages, magnetic fields can affect the
measured values (= for values that are greater than the values approved by the EN standard (sine
30 A/m)).
For this reason, the sensor must be magnetically shielded: the housing can be shielded with tin plates
or electric sheets without a privileged direction (e.g. V330-35A).
The sheet must have the following properties:
• Relative magnetic permeability mr ³ 300
• Plate thickness d ³ 0.35 mm (d ³ )0.014 in
Proline Promass E 200 HART
A0015594
mm (in)
A0013937
Endress+Hauser