Dynasonics 901 Series Enhanced Ultrasonic Flow Meter - Manual (Page 21)

Rev.
04/02 -20- D901/M
Note: The D901/M flow meter system requires a full pipe
of liquid before a successful startup can be completed.
Do not attempt to make adjustments or change
configurations until a full pipe is verified.
Note: If Dow 732 RTV was utilized to couple the
transducers to the pipe, the adhesive must fully cure
before power is applied to the instrument. Dow 732
requires 24 hours to cure satisfactorily. If Dow 111
silicone grease was utilized as a couplant, the curing time
is not required.
Procedure:
1. Verify that all wiring is properly connected and routed.
2. Set the SENSITIVITY Control to -2. This control is
located on the inner door.
3. Apply power. The POWER indicator will illuminate.
4. Adjust the SENSITIVITY control so that the right-most
LED on the SIGNAL STRENGTH bar meter just
illuminates.
Note: It is undesirable to adjust the SENSITIVITY control
to a position higher than necessary, as ambient noise can
also be amplified. This noise can cause false readings to
occur.
5. If the pipe is full of a flowing liquid, the READ indicator
will illuminate and the display will begin reading fluid
velocity as FPS (Feet per Second) or MPS (Meters per
Second). It is normal to have low SIGNAL
STRENGTH and FAULT indication at ZERO flow.
6. If a SIGNAL STRENGTH reading in the green portion
of the bar meter could not be obtained, refer to the
troubleshooting section of this manual.
After a successful flow meter installation and startup
PART 3 - STARTUP AND CONFIGURATION
Before Starting the
Instrument
Sensitivity Adjustment
Control
Instrument Startup