Operating the VN2000 Transmitter
Page 19
June 2017
VRX-UM-02233-EN-02
MPORTTNT
I
All liquid applications should be set to a dampening of 8. All steam and gas applications should be set to a dampening of Auto.
OTEE:
N
All totalized flow rate is counted, regardless of the dampening setting . The totalizer NEVER misses any reading based
on the dampening selected .
Meter Type
The
Meter Type
option adjusts the electronics to work with all meter types in the VN2000 Flow Meter Series (large or small,
inversion or insertion) .
Verify that the
Meter Type
is
Large Insertion
.
MPORTTNT
I
DO NOT change this setting. Contact the factory if you suspect this setting has been changed.
K-Factor Source (Insertion Meter Only)
Use the K-Factor Source option to indicate the type of pipe used for flow calculations .
Line Size
Use for ASME pipe along with
Schedule
option . Select the pipe size in
Programming Mode Level 1
DN
Use for DN pipe . Select the pipe size in
Programming Mode Level 1
Pipe ID
Use for non-standard pipes or when the pipe inner diameter (ID) can be measured directly . Enter the pipe
size in
Programming Mode Level 1
K-Factor Entry Use K-Factor only and not pipe dimensions in calculations . When
K-Factor Entry
is selected, the pipe size
option does not appear in
Programming Mode Level 1
Table 8: K-factor source options
K-Factor (Insertion Meter Only)
The
K-Factor
is used for VN2000 insertion vortex flow meters . The transmitter automatically generates the K-Factor based on
the flow meter model type and bore size .
OTEE:
N
DO NOT change the
K-Factor
that came with your device without first consulting the factory .
To change the
K-Factor
, press
Left Trrow
to move the cursor under the digit to be changed . Press
Up Trrow
to change the
digit . If the
K-Factor
does not match the “VN2000 SF” found on the bottom right of your sizing sheet, contact the manufacturer .
Schedule (Insertion Meter Only)
When the
K-Factor Source
is
Line Size
, use the
Schedule
option to select the pipe schedule .
Gas Constant (Gas Only)
Use the
Gas Constant
option only when the gas has characteristics that require calculations other then the standard formula
for calculating the effects of temperature and pressure on the gas flow rate .
Temperature Calibration
The
Temp Calibration
option calibrates the internal RTD located in the flow meter body . This is used only for flow meters that
have the Mass Flow Transmitter . The calibration is done at the factory and these settings should NOT be changed unless for
reasons below:
Press
Up Trrow
to scroll through the options:
• Temp Offset
is factory-set and should NOT be changed
• Temp Gain
is factory-set and should NOT be changed except to calibrate the operating pressure and temperature in the
steam flow meter .
◊ If the operating internal pressure and temperature of the flow meter must be in-field calibrated, do the following:
• To calibrate to a higher setting, increase the
Temp Gain
by 10 units at a time until the desired operating pressure
and temperature display on the transmitter
• To calibrate to a lower setting, decrease the
Temp Gain
by 10 units at a time until the desired operating pressure
and temperature display on the transmitter .