LRF-3000H Handheld Ultrasonic Flowmeter
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that poor signal was detected at least once. Also,
it indicates that the operation was interrupted or
problems occurred in the installation.
Menu
8
3
Automatic Flow Correction
With the function of automatic flow correction, the
flow lost in an offline session can be estimated
and automatically adjusted. The estimate is based
on the average value, which is obtained from flow
rate before
going offline and flow measured after going online
the next time, multiplied times the time period
that the meter was offline. Select “NO” to cancel
this function.
Menu
9
0
Signal Strength and Signal Quality
Display the measured signal strength and signal
quality Q value upstream and downstream.
Signal strength is indicated from 00.0
～
99.9. A
reading of 00.0 indicates no signal detected, while
99.9 indicates maximum signal strength. Normally
the 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.
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.
Menu
83
Automatic Correction
OFF
15
:
08
:
15
Q
=
97
R
Menu
90
SQuality
UP
:
90.5
DN
:
90.0
Q
=
97
15
:
08
:
25
Q
=
97
R
Menu
91
TOM/TOS*100
0.0000
15
:
08
:
45
Q
=
97
R
