User`s manual

December 2003
A-4 Entering Special Transducer Pipe Parameters
Entering Parameters for Clamp-On Transducers
(cont.)
4C. Entering the Time Delay
Tw, the time delay, is actually the time the transducer signal
spends travelling through the transducer and cable. This time
must be taken into consideration since the TransPort calculates
the flow rate by subtracting the time of the upstream and
downstream signals. Therefore, the time delay must be subtracted
out for an accurate measurement.
Use the numeric keys to enter the GE Panametrics supplied time
delay (in microseconds) and press [ENT].
5C. Entering the Transducer Wedge Angle
The wedge angle for clamp-ons is the next prompt. The angle of
the ultrasonic transmission must be taken into account when
calculating the flow rate.
Use the numeric keys to enter the GE Panametrics supplied
transducer wedge angle (in degrees) and press [ENT].
6C. Entering the Transducer Wedge Sound Speed
In addition to the angle, clamp-on transducers require that you
enter the sound speed of the wedge.
Use the numeric keys to enter the GE Panametrics supplied
wedge sound speed (in ft/sec or m/sec) and press [ENT].