Siemens SITRANS FSS200 Installation Manual page 26

Ultrasonic clamp-on sensors
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Installing/mounting
4.4 Determining a location
● Avoid, if possible, the following installations:
– Installation at the highest point of the pipe system
– Installation in vertical pipes with free outlet or downwards flow
Selecting a location for the sensors
1. Locate the sensors downstream from the center of the longest available straight run. A
location ten pipe diameters or greater downstream from the nearest bend will provide
adequate flow profile conditions.
2. Do not, if possible, install the sensors downstream from a throttling valve, a mixing tank,
the discharge of a positive displacement pump or any other equipment that could possibly
aerate the liquid. The best location will be as free as possible from flow disturbances,
vibration, sources of heat, noise, or radiated energy.
3. Avoid mounting the sensors on a section of pipe with any external scale. Remove all
scale, rust, loose paint, etc., from the location.
4. Do not mount the sensors on a surface aberration (pipe seam, etc.)
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FSS200 clamp-on sensors
Installation Manual, 08/2017, A5E36255466-AC

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