Installation Deltabar FMD71, FMD72
18 Endress+Hauser
5 Installation
• Moisture must not penetrate the housing when mounting the device, establishing the
electrical connection and during operation.
• When measuring in media containing solids, such as dirty liquids, installing separators
and drain valves is useful for capturing and removing sediment.
• Do not clean or touch process isolating diaphragms with hard and/or pointed objects.
• Do not remove process isolating diaphragm protection until shortly before installation.
• Always firmly tighten the housing cover and the cable entries.
• Point the cable and connector downwards where possible to prevent moisture from
entering (e.g. rain or condensation water).
5.1 Mounting dimensions
For dimensions, see the "Mechanical construction" section in the Technical Information.
5.2 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.
5.3 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).
5.4 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 mounting 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.
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