Endress+Hauser Proline Promass F 100 - Page 24

Installation Proline Promass F 100 Modbus RS485
24
NOTICE
Electronics overheating on account of thermal insulation!
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Recommended orientation: horizontal orientation, transmitter housing pointing
downwards.
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Do not insulate the transmitter housing .
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Maximum permissible temperature at the lower end of the transmitter housing:
80 °C (176 °F)
‣
Thermal insulation with extended neck free: the insulation is omitted around the
extended neck. We recommend that you do not insulate the extended neck in order to
ensure optimum dissipation of heat.
A0034391
 7 Thermal insulation with extended neck free
Heating
NOTICE
Electronics can overheat due to elevated ambient temperature!
‣
Observe maximum permitted ambient temperature for the transmitter .
‣
Depending on the fluid temperature, take the device orientation requirements into
account .
NOTICE
Danger of overheating when heating
‣
Ensure that the temperature at the lower end of the transmitter housing does not
exceed 80 °C (176 °F).
‣
Ensure that convection takes place on a sufficiently large scale at the transmitter neck.
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Ensure that a sufficiently large area of the housing support remains exposed. The
uncovered part serves as a radiator and protects the electronics from overheating and
excessive cooling.
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 permitted 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).