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SL1188P Ultrasonic transit-time flowmeter
Revision
:
2.0.0
Page
45
of
81
signal strength should be
≥
60.0. Signal quality Q is
indicated by 00
~
99.Therefore, 00 indicates the
poorest signal while 99 indicates the best signal.
Normally, signal quality Q value should be better than
50.
Menu
9
1
TOM/TOS*100
Display the ratio between the actual measured
transmit time and the calculated transmit time
according to customer
’
s requirement. Normally the
ratio should be 100
±
3
%
. If the difference is too large,
the user should check that the parameters are entered
correctly, especially the sound velocity of the fluid
and the installation of the transducers. This data is of
no use before the system is ready.
TOM/TOS*100 [91
0.0000%
Menu
9
2
Fluid Sound Velocity
Display the measured fluid sound velocity. Normally
this value should be approximately equal to the
entered value in Window M21. If the difference is too
large, it probably results from an incorrect value
entered in Window M21 or improper installation of
the transducers.
Fluid Sound Velocity
1443.4 m/s
Menu
9
3
Total Time and Delta Time
Display the measured ultrasonic average time (unit:
nS) and delta time of the upstream and downstream
(unit: nS) time. The velocity calculation in the
Flowmeter is based on the two readings. The delta
time is the best indication that the instrument is
running steadily. Normally the fluctuation in the ratio
of the delta time should be lower than 20%. If it is not,
it is necessary to check if the transducers are installed
properly or if the parameters have been entered
correctly.
Totl Time, Delta Time
8.9149uS, -171.09nS
Menu
9
4
Reynolds Number and Factor
Display the Reynolds number that is calculated by the
Flowmeter and the factor that is set currently by the
Flowmeter. Normally this scaling factor is the average
of the line and surface velocity factor inside the pipe.
Reynolds Number [94
0.0000 1.0000
Menu
/ +
0
Power ON/OFF Time
To view the power on/off time and flow rate for the
last 64 uTPCte times to obtain the offline time period
and the corresponding flow rate. Enter the window,
ON/OFF Time [+0
Press ENT When Ready