Dynasonics TFX Ultra Transit Time Flow Meters - Manual (Page 37)

STARTUP AND CONFIGURATION
Before Starting the Instrument
OTE:
N
This flow metering system requires a full pipe of liquid before a successful start-up can be completed. Do not attempt
to make adjustments or change configurations until a full pipe is verified.
OTE:
N
If Dow 732 RTV was utilized to couple the transducers to the pipe, the adhesive must be fully cured before readings
are attempted. Dow 732 requires 24 hours to cure satisfactorily. If Sonotemp® acoustic coupling grease was utilized
as a couplant, curing is not required.
Instrument Startup
Procedure:
1. Verify that all wiring is properly connected and routed, as described in
TRANSMITTER INSTALLATION of this manual.
2. Verify that the transducers are properly mounted, as described in TRANSDUCER INSTALLATION of this manual.
3. Apply power. The display of the flow meter will briefly show a software version number and then all of the segments will
illuminate in succession.
OTE:
N In order to complete the installation of the flow meter, the pipe must be full of liquid.
To verify proper installation and flow measurement operation:
1. Go to the SER MENU and confirm that signal strength SIG STR is between 5…98. If the signal strength is lower than five,
verify that proper transducer mounting methods and liquid/pipe characteristics have been entered. To increase signal
strength, if a W-Mount transducer installation was selected, re-configure for a V-Mount installation; if V-Mount was
selected, re-configure for Z-Mount.
OTE:
N Mounting configuration changes apply only to DTTN, DTTL and DTTH transducer sets.
2. Verify that the actual measured liquid sound speed is very close to the expected value. The measured liquid sound speed
(SSPD fps and SSPD mps) is displayed in the SER MENU. Verify that the measured sound speed is within two percent of the
value entered as FLUID SS in the BSC MENU. The pipe must be full of liquid in order to make this measurement.
Once the meter is operating properly, refer to the KEYPAD PROGRAMMING section of this manual for additional
programming features.
STARTUP AND CONFIGURATION
Page 37 March 2014