Operating the VN2000 Transmitter
Page 16
June 2017
VRX-UM-02233-EN-02
Set Flow
1 . Press
P
. The “New Flow Rate” message displays . This is a snapshot of the current flow rate .
NEW FLOW RATE
000000 GAL/HR
2 . Press
Left Trrow
to move the cursor and
Up Trrow
to change the digits to the desired flow rate .
3 . Press
Menu
and let the meter come back to
Flow Rate
and
Flow Total
.
The VN2000 Transmitter adjusts the internal calibration curve, allowing the new flow rate to appear .
Set Ratio
1 . When the
Set Ratio
menu displays, press
P
. The “Ratio – 1 .00” message displays .
2 . Press
Left Trrow
to move the cursor and
Up Trrow
to change the digits to the desired ratio .
3 . Press
Menu
and let the meter come back to
Flow Rate
and
Flow Total
.
The VN2000 Transmitter adjusts the internal calibration curve, allowing the new ratio to appear .
The ratio of one (1) equals the current total in the VN2000 Transmitter totalizer .
Example 1: If the total accumulated flow is 25% higher than it should, change the ratio to 0 .75% to lower the internal curve
and all accumulated flow readings by 25% .
Example 2: If the total accumulated flow is 25% lower than it should, change the ratio to 1 .25% to raise the internal curve
and all accumulated flow readings by 25% .
OTEE:
N
Brownouts and blackouts do not affect the in-field calibrated settings . Select
RESET
to completely remove all in-field
calibrated settings .
200.00
181.82
163.64
127.27
109.09
90.91
72.73
54.55
36.36
145.45
0
50
100
150
200
250
300
1
2
3
4
5
6
7
8
9
10
Calibration Points
Fl
ow
U
ni
ts
m
3/
hr
Upper Turbulence
Flow Rate
Lower Turbulence
Current Flow Rate is being affected by poor flow profile,
driving the flow rate lower. This entire curve can be adjusted
upward to the correct Flow Rate by entering the correct Flow Rate
in Flow Adjust mode:
181 m3/hr
. The new curve will have
repeatability of ± 0.25%.
Figure 5: In-field calibration points
