Siemens 7ME3510, Operating Instructions Manual, Page: 31 / 214

Connecting
5.2 Sensor Wiring
FUP1010 IP67 Portable
Operating Instructions, 03/2012, A5E02951522-02
29
Direct mount provides a shorter sonic beam path. This usually improves performance with
sonically attenuative liquids or pipe materials. We recommend using Direct mount for plastic
pipes. Compared to Direct mounting, Reflect mount requires almost double the amount of
mounting length. Therefore, Direct mount may be the only option if the availability of
mounting space is limited.
① ④
Upstream Sensor Downstream Sensor
②
Pipe
⑤
Sonic path
③
Flow Direction
Figure 5-3 Direct Mount (Pipe shown from above in 12 o'clock position)
Mounting Supplies
The following items will be needed to mount the sensors (most are supplied):
●
Mounting Frames or Mounting tracks
● Tape, chalk and a ruler or measuring tape
● Spacer Bar
● Mounting Guide (for Direct Mount)
● Ultrasonic coupling compound and/or coupling pads
● Sensors (matched set)
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 the
best 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.)