Connecting
5.4 Installing the Sensor
5.4
Installing the Sensor
5.4.1
Preliminary Installation Procedures
Clamp-on Sensor Mounting Modes
Note
When installing sensors, do not key in the V/M (Version/Modification) label number as the
Sensor Size.
Reflect and Direct mounting modes are supported for clamp-on sensors. The transmitter
recommends a mounting mode after analyzing your pipe and liquid data entries. However,
you can install clamp-on sensors in the way that best suits your application and the sensor
type you have purchased.
①
②
③
Figure 5-6
Reflect mount is recommended whenever possible. This is the simplest way to mount the
sensors. Also, Reflect mount resists abnormal flow profile conditions such as cross-flow
within the flow stream. Reflect mount supports the AutoZero function, which zeroes the
flowmeter automatically without user-participation. In addition, Reflect mount may be the only
possibility if conditions do not allow access to the opposite side of the pipe.
Direct mount provides a shorter sonic beam path. This usually improves performance with
sonically attenuative liquids or pipe materials. Direct mount is recommended 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.
32
Upstream Sensor
Flow Direction
Downstream Sensor
Reflect Mount (Pipe shown from above in 12 o'clock position)
④
Sonic Path
⑤
Pipe
Operating Instructions, 02/2012, A5E03086487-05
FST020 IP65 NEMA 4X