Xylem FM500 ULTRASONIC FLOW METERS - Manual (Page 43)

NO
NO
Air bubbles may be present
Sediment may be present
Page 43
Mark First Transducer Location (A)
Mark Second Transducer Location (B)
Measure Separation Distance
TRANSIT TIME V-MOUNT MODE
Centerline
Transit Time V mounting method:
When the meter is operated in the Transit Time method, marking the second transducer
location is required.
The V Mount mode requires careful separation distance measurements. Inaccurate
placement of the transducers may result in insufficient signal strength and poor
measurement accuracy.
Draw a straight centerline, parallel to the center line of the pipe, from the first
transducer location mark (A) through to the second transducer location (B). Place a mark
on the centerline at the correct transducer separation distance.
If the fluid contains little or no particles (up to 10% maximum), operate the meter using
the Transit Time method to obtain the best accuracy.
V-MOUNT MODE
6.7
Transit Time
Transducer
Installation
V Mount Mode
Ultrasonic Flowmeter