Blue-White Sonic-Pro Hybrid Ultrasonic Flowmeters - Manual (Page 50)

7.1.2
Total Flow
Measurement
As well as averaging measurements to display flow rate, the flowmeter totals all
measurements divided by the measurement period to compute a totalized flow. This is
written to the display at the same configured intervals as for flow readings.
The units of measure for total flow can be configured independently of flow rate.
Pressing the CLEAR soft button zeros the total accumulated flow if this option has been
enabled by the configuration.
Should the flowmeter experience a power loss or be restarted by entry into Setup Mode,
it will preserve a recent value of the total flow and restore this when next entering Run
Mode. In Run Mode, the Total Flow will be saved to non-volatile memory every ten
seconds. Any fluid that flows while the flowmeter is not in Run Mode is not included in
the total.
The top line of the Run Mode screen shows the status of the measurement process. On
the far left is shown the active Configuration Number, active Measurement Mode
and the Transducer Separation Distance. In the center is shown the Goodness of
Measurement index. On the right is shown the Speed of Sound in the fluid (if in
transit time mode). 7.2
Measurement
Status Areas
The field on the top left displays the active
Configuration Set , the measurement
method in effect (T for Transit Time or D for
Doppler) and the transducer separation
distance. The display shown to the right
indicates:
! Configuration Set #1
! Transit Time measure method
! 2.46 inches separation distance.
The measurement method can be changed
by the two-position switch on the controller
Alarm
625.38
4345625.38
SETUP SWAP RELAY CLEAR
U.S. Gallons
Relay #3 Relay #2 Relay #1
off Active
1 T 2.46 in. [¢¢¢£] 1480
U.S. Gallons / min
1 T 2.46 in.
motherboard (the wiring access door must be removed to get at this switch) whereupon
the flowmeter will automatically enter Setup Mode.
In Transit Time mode, the transducer separation distance shown is the distance used in
Transducer Positioning, see section 2.8 above. In Doppler mode, this display value
will always be zero. In both modes, the units of measure will be for the distance selected
in the Transducer Setup menu, see section 5.4.2 above. If English (U.S. units) is
selected, then the units displayed will be in. for inches. If Metric (SI units) is selected,
then the units displayed will be mm for millimeters.
7.2.1
Configuration
and Mode
[¢¢¢£]
7.2.2
Goodness of
Measurement The field in the top center of the display status line displays the “Goodness of
Measurement” index which indicates the reliability of ultrasonic flow
measurement under the present working conditions. This is computed based on a
number of variables including fluid velocity, signal strength, consistency of
measurements, and sound speed accuracy. The average samples computed during each
display update interval is taken and then displayed as a reliability index of 0 to 4 solid
boxes. Zero solid boxes indicates an unreliable measurement and four boxes indicate high
reliability. Acceptable measurements are indicated by a minimum of two solid boxes.
The same goodness of measurement indication appears on the four amber LEDs on the
controller motherboard, which can be viewed if the wiring access door is removed.
If flow measurement is restarted (by passing through the Startup State), then prior
goodness of measurement information is discarded and the display will show zero until
new information is computed.
Page 50 Sonic-Pro
Industries, Ltd. Industries, Ltd.
ProSeries
by Blue-White Ind.
TM