Deltabar FMD71, FMD72
24 Endress+Hauser
Installation
• No moisture may enter the housing when installing or operating the device, or when establishing
the electrical connection.
• When measuring in media containing solids, such as dirty liquids, installing separators and drain
valves is useful for capturing and removing sediment.
• If possible, point the cable and connector downwards to prevent moisture (e.g. rain or
condensation) from penetrating.
Mounting location
The FMD71/FMD72 is best suited to level measurement in vessels with pressure overlay or in
vacuum vessels and tanks, high distillation columns and other vessels with changing ambient
temperatures.
The sensor module HP is mounted on the lower measuring connection and the sensor module LP is
mounted above the maximum level. The transmitter can be mounted on pipes or walls with the
mounting bracket.
Orientation
• Transmitter: Any orientation.
• Sensor modules: The orientation can cause a zero point shift .
This position-dependent zero point shift can be corrected directly at the device via the operating
key, and also in hazardous areas in the case of devices with external operation (position
adjustment).
General installation
instructions
Mounting the sensor modules and transmitter is very easy
• The housings of the sensor modules can be rotated up to 360°.
• The transmitter is freely rotatable in the mounting bracket.
The sensor modules and transmitter can be easily aligned when mounted.
Your benefits
• Easy installation due to optimum alignment of housing
• Easily accessible device operation
• Optimum readability of the onsite display (optional)
• Easy pipe installation due to optional alignment of the modules.
Thermal insulation - FMD71
high-temperature version
The FMD71 high-temperature version may only be insulated up to a certain height. The maximum
permitted insulation height is indicated on the devices and applies to an insulation material with a
heat conductivity ≤ 0.04 W/(m x K) and to the maximum permitted ambient and process
temperature. The insulation height is not indicated on hygienic connections.
• Ambient temperature (T
A
): ≤ 70 °C (158 °F)
• Process temperature (T
P
): ≤ 150 °C (302 °F)
The data were determined under the most critical application "quiescent air".
A0021075
A Ambient temperature
B Process temperature
1 Insulation height
2 Insulation material
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