Vortex VN2000, Руководство пользователя, Страница: 18 / 28

Operating the VN2000 Transmitter
Page 18 June 2017 VRX-UM-02233-EN-02
Programming Mode Level 3 (T1-SS78MB-S)
With the power ON and Flow Rate and Flow Total displayed, press Left Trrow , then Up Trrow . When the message
“A1-SS78MB-S” displays, press Menu to scroll through the Level 3 programming options:
• 4 mA Field Calibration
• 20 mA Field Calibration
• Units Base
(English or Metric)
• Dampening
• Meter Type
• K-Factor Source
(Insertion meters only)
• K-Factor (Insertion meters only)
• Schedule (Insertion meters only)
• Gas Constant (if Fluid is set to Gas)
• Temperature Calibration
• Application
• Settings
• Vibration Control
4 mT Field Calibrate
The 4 mA Field Calibrate option is a trim function that is factory-calibrated but can be field-adjusted if the equipment is not
seeing exactly 4 mA at zero flow due to ground loops or other equipment issues not relating to the flow meter .
20 mT Field Calibrate
MPORTTNT I
Do not change this setting.
The 20 mA Field Calibrate option is used at the factory to calibrate the maximum output of the flow meter . The typical setting
range is 3960…4000 .
Units Base
The Units Base option is used at the factory to set up all internal units to English or Metric .
Dampening
The Dampening option allows adjustment of the Flow Rate Averaging or Dampening . The most common use for this feature is
to eliminate high flow variation or to lessen the flow rate change on the display that is due to the flow dynamics in the pipe .
This option allows for stabilization of the flow reading when erratic flow is present in the pipe .
Press
Up Trrow
to scroll through the
Dampening
options:
• The Auto Setting is used for steam and gases:
◊ Auto Setting uses mathematical calculations to determine the correct dampening setting .
◊ When the flow rate is steady (not changing more than 15% from one reading to the next), the dampening is set to the
highest setting to provide stable and reliable flow readings .
◊ When the flow rate is fluctuating (changing more than 15% from one reading to the next), dampening is decreased to
provide a quick response time to flow rate changes .
• The 1-5 Setting sets faster response times .
• The 6-9 Setting sets slower response times for steadier instantaneous flow readings .