Dynasonics 701_771C Series Insertion Ultrasonic Flow Meter - Manual (Page 25)

Rev. 12/97 -24- D77X
Note: The D77/DT7 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.
Procedure:
1. Verify that all wiring is properly connected and routed.
2. Apply power. The POWER indicator will illuminate.
3. Press the SIGNAL STR key and verify SIGNAL STR
counts greater than 100. Adjust the GAIN (R13 on the
Main PCB) control so that a reading greater than 100
counts is observed. It is rare that this setting will need
adjustment from factory settings.
Note: It is undesirable to adjust the GAIN 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/zero SIGNAL
STRENGTH and FAULT indication at ZERO flow.
PART 3 - STARTUP AND CONFIGURATION
Before Starting the
Instrument
Important!
Instrument Startup