LRF-3000H Handheld Ultrasonic Flowmeter
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Set zero must be carried out after the transducers
are installed and the flow inside the pipe is in the
absolute static state (no liquid movement in the
pipe). Thus, the“Zero Point” resulting from
different pipe mounting location and parameters
can be eliminated. The measuring accuracy at low
flow is enhanced by doing this function and flow
offset is eliminated.
Press
ENT
, wait for the processing instructions at
the bottom right corner of the display to reach 0.
Performing Set zero with existing flow may cause
the flow to be displayed as “0”. If so, it can be
recovered via Window M43.
Menu
4
3
Reset Zero
Select “YES”; reset “Zero Point” which was set by
the user.
Menu
4
4
Manual Zero Point
This method is not commonly used. It is only
suitable for experienced operators to set zero
under conditions when it is not preferable to use
other methods.
Enter the value manually to add to the measured
value to obtain the actual value. For example:
Actual measured value
＝
250 m3/H
Value Deviation
＝
10 m3/H
Flowmeter Display
＝
240 m3/H
.
Normally, set the value as “0”.
Menu
4
5
Scale Factor
The scale factor is used to modify the
measurement results. The user can enter a
numerical value other than “1” according to
calibration results.
Menu
5
5
Current Loop Mode Select
0.
4-20mA output mode
1.
4-20mA Corresponding Velocity
Menu
42
Set Zero
Press
ENT to
go
15
:
02
:
30
Q
=
97
R
Menu
43
Reset Zero
NO
15
:
02
:
58
Q
=
97
R
Menu
44
Manual
ZeroPoint
0 m3/h
15
:
03
:
15
Q
=
97
R
Menu
45
Scale
Factor
1
15
:
03
:
15
Q
=
97
R
