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Insulation and heat tracing
PROFIBUS PA
Fig. 59: Positioning of pressure taps / PROFIBUS PA communication line
①
②
③
④
x, y = minimum 4 to 5 x D
x
y
D
12.5 Insulation and heat tracing
12.5.1 Heat tracing
The majority of applications do not require or provide insulation or heat tracing for the
sensor. Product versions with insulation and/or heat tracing are available for specific
technical applications, see applicable Operating Instructions. Starting with fluid
temperatures of approx. 80 °C above or below the ambient temperature, insulating the
sensor is recommended if the goal is to maintain utmost accuracy. These measures are
also sensible with increased requirements for fluid temperature stability.
The sensor is heated by means of heat tracing via a heat transfer fluid running through
stainless steel pipes. The heat transfer fluid is supplied through process connections that
can be selected. The operator is responsible for temperature control of the heat carrier.
Here the specifications for pressure and the temperature of the heat transfer fluid must be
met, see applicable Operating Instructions.
Heat tracing is only available for the remote type of flow meter and must be selected by
including an appropriate device option when placing the order, see applicable Operating
Instructions.
y
x
7
2
Mounting flanges
Pressure taps
SITRANS FC
PROFIBUS PA
Differential pressure transmitter
with PROFIBUS PA
Flow line upstream or downstream of the SITRANS FC sensor
Flow line upstream or downstream of the pressure transmitter
Inner diameter of process line
5
6
3
1
4
PROFIBUS PA Communication
⑤
line
PROFIBUS PA Junction box
⑥
Other flow elements
⑦
A5E52748387-AA, 2023/09
Installation
x
y
1
2
FC7x0
D
7
95 / 180
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