Figure 5-8 Sensor Alignment (Horizontal Plane) - Siemens FUS1010 Operating Instructions Manual

Connecting
5.5 Sensor Installation
Selecting a location for the sensors
1. Locate the sensors downstream from the center of the longest available straight run. A
2. Do not, if possible, install the sensors downstream from a throttling valve, a mixing tank,
3. Avoid mounting the sensors on a section of pipe with any external scale. Remove all
4. Do not mount the sensors on a surface aberration (pipe seam, etc.)
5. Do not mount sensors from different ultrasonic flow meters on the same pipe. Also, do
6. Never mount sensors under water, unless you order submersible units and you install
7. Avoid mounting sensors on the top or bottom of a horizontal pipe. The best placement on
Preparing the Pipe
1. Pick a mounting location with the longest straight run. You must have easy access to at
2. Decide on your mounting mode (Direct or Reflect). Always use Reflect Mode whenever
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location ten pipe diameters or greater downstream from the nearest bend will provide
adequate flow profile conditions.
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.
scale, rust, loose paint, etc., from the location.
not run the sensor cables in common bundles with cables from other instrumentation.
You can run these cables through a common conduit ONLY if they originate at the same
flow meter.
them in accordance with factory instructions.
a horizontal pipe is either the ten o'clock and two o'clock position for Reflect Mode, or one
sensor at nine o'clock and one sensor at three o'clock for Direct Mode. Mounting on a
vertical pipe is recommended only if flow is in the upward direction. When mounting on a
vertical pipe flowing in a downward direction make sure there is sufficient back pressure
in the system to maintain a full pipe.
①
Dual Path, Reflect Mount
②
Dual Path, Direct Mount
Figure 5-8 Sensor Alignment (Horizontal Plane)
least one side of your pipe. The pipe at the mounting location must remain full, even at
zero flow.
possible. You may only need to use Direct Mode if your pipe is plastic.
FUS1010 IP65 NEMA 4X & IP66 NEMA 7
Operating Instructions, 01/2013, A5E02951520-AC