Siemens 7ME3510, Operating Instructions Manual, Page: 32 / 214

Connecting
5.2 Sensor Wiring
FUP1010 IP67 Portable
30
Operating Instructions, 03/2012, A5E02951522-02
5. Do not mount sensors from different ultrasonic flow meters on the same pipe. Also, do
not run the sensor cables in common bundles with cables from communication
equipment, other Siemens systems, or any type of ultrasonic equipment. You can run
these cables through a common conduit ONLY if they originate at the same flow meter.
6. Never mount sensors under water, unless you order submersible units and you install
them in accordance with factory instructions.
7. Never mount sensors on the top or bottom of a horizontal pipe. The best placement on 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.
R
①
Dual Path, Reflect Mount
②
Dual Path, Direct Mount
Figure 5-4 Sensor Alignment (Horizontal Plane)
Preparing the Pipe
1. Pick a mounting location with the longest straight run. You must have easy access to at
least one side of your pipe. The pipe at the mounting location must remain full, even at
zero flow.
2. Decide on your mounting mode (Direct or Reflect). Always use Reflect Mode whenever
possible. You may only need to use Direct Mode if your pipe is plastic.
3. After receiving the spacing dimensions from the Installation Menu, prepare the pipe
surface. De-grease the surface, if necessary, and remove any grit, corrosion, rust, loose
paint, etc. Use abrasive material provided to provide a clean contact surface for the
sensors.