Reflex (V) Mode; Double Reflex (W) Mode; Triple Reflex (Wv) Mode; Quadruple Reflex (Ww) Mode - Micronics Portaflow 222 User Manual

Portaflow 222 & 333 User Manual
1.2.1

Reflex (V) Mode

This is the mode most commonly used. The two transducers (U & D) are attached to the pipe in line
with each other and the signals passing between them are reflected by the opposite pipe wall.
The separation distance is calculated by the instrument in response to entered data concerning the
pipe and fluid characteristics.
1.2.2

Double Reflex (W) Mode

In this mode the separation distance is calculated to give a double bounce
occur if the pipe diameter is small and the calculated reflex mode separation distance would be
impractical for the transducers in use.
1.2.3

Triple Reflex (WV) Mode

This mode goes one step further to detect a triple bounce. This would normally be used when
working with very small pipes relative to the transducer in use.
1.2.4

Quadruple Reflex (WW) Mode

This mode goes one step further again, to use a quadruple bounce. Again, this would normally be
used when working with very small pipes relative to the transducer in use.
1.2.5

Diagonal Mode

This mode might be selected by the instrument where relatively large pipes are concerned. In this
mode the transducers are located on opposite sides of the pipe, but the separation distance is still
critical in order for the signals to be received correctly.
This mode might be used with the standard 'A' & 'B' transducer sets but for very large pipes
installation the optional transducer set 'D' might be recommended.
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In general, it should be noted that errors accumulate as the number of bounces increase. Units are
calibrated using single reflex mode. Any inherent inaccuracy will be amplified by using higher order
modes such as triple and quadruple bounce. In addition to this, as the path length is longer, the
signal will also be more attenuated with higher order operating modes. Attenuation is also greater
with sensors using higher operating frequencies. (E.g. Signals from A sensors will be more
attenuated than with B sensors.)
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. This is most likely to
Issue 1.0 March 2021