Installation
Proline Promass F 500 EtherNet/IP
28
System pressure
It is important that cavitation does not occur, or that gases entrained in the liquids do not
outgas.
Cavitation is caused if the pressure drops below the vapor pressure:
• In liquids that have a low boiling point (e.g. hydrocarbons, solvents, liquefied gases)
• In suction lines
‣
Ensure the system pressure is sufficiently high to prevent cavitation and outgassing.
For this reason, the following mounting locations are recommended:
• At the lowest point in a vertical pipe
• Downstream from pumps (no danger of vacuum)
A0028777
Thermal insulation
In the case of some fluids, it is important to keep the heat radiated from the sensor to the
transmitter to a low level. A wide range of materials can be used for the required
insulation.
The following device versions are recommended for versions with thermal insulation:
• Version with extended neck for insulation:
Order code for "Sensor option", option
CG
with an extended neck length of
105 mm (4.13 in).
• Extended temperature version:
Order code for "Measuring tube material", option
SD
,
SE
,
SF
or
TH
with an extended neck
length of 105 mm (4.13 in).
• High-temperature version:
Order code for "Measuring tube material", option
TT
or
TU
with an extended neck length
of 142 mm (5.59 in).
NOTICE
Electronics overheating on account of thermal insulation!
‣
Recommended orientation: horizontal orientation, sensor connection housing pointing
downwards.
‣
Do not insulate the sensor connection housing.
‣
Maximum permissible temperature at the lower end of the sensor connection 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.
