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Design and function
Operating Instructions
Diagonal mode
This mode might be selected by the instrument where relatively large pipes are concerned. In this mode the transducers are locat-
ed 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 really large pipe installation the optional transducer set
'D' might be recommended.
Separation
Upstream
Distance
Transducer
U
Fluid Flow
D
*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 sen-
sors).
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