VELTRON II
Air Monitor Corporation
116-011-98.P65 (8/30/10)
VELTRON II - IO&M Manual
3.7 – DATA DISPLAY
The Standard Display is a 2 line by 20 character Liquid Crystal Display (LCD) capable of displaying the transmitter
signal in engineering units (such as IN w.c., FPM, CFM) and a user selectable second line of data when in
Normal
operation. It is also utilized by the Operator Setup menu for displaying the menu parameters and values.
The optional Enhanced Display is a backlit graphical LCD and replaces the Standard Display. It is capable of displaying
the transmitter signals in Engineering units plus other signals that become available when the Alarm and/or Special
Function options described in Sections 3.5 and 3.6 are implemented. It can also display a user settable I.D. number
using any combination of standard ASCII characters. It is also used by the Operator Setup menu for displaying the
menu parameters and values. Configuring the Enhanced Display for
Normal
operation is done using the Operator Setup
menu.
3.8 – K-FACTOR
The VELTRON II is equipped with a K-factor feature which allows for the introduction of a bias and/or gain factor into the
transmitter's flow calculations. The K-factor feature is intended to be used in two types of applications:
1.
To adjust for flow measurement error as a result of highly distorted airflow induced by upstream or downstream flow
disturbances.
2.
To adjust the transmitter's output to bring it into close correlation with field measured flow data.
The K-Factor gain and bias values can be entered directly or the VELTRON II can calculate these values based on
measured and reference values from a 1 or 3 point airflow traverse.
3.9 – FLOW/DIFFERENTIAL PRESSURE CALCULATOR
The VELTRON II is equipped with an integral calculator feature that allows the user to determine the maximum flow or
differential pressure from the appropriate variables. This feature allows the user to determine input or output values at
various points of the process or new values if the process parameters have changed. Also, the calculator can be used
to implement a single-point density compensation for operating temperature and/or absolute pressure.
3.10 – NETWORK (option)
The VELTRON II can be provided with optional ModBus TCP/IP over Ethernet for serial data communication.
3.11 – MULTIPLE OPERATING POWER SELECTIONS
The VELTRON II can be powered by 24VAC or 24VDC.
3.12 – ENCLOSURE
The VELTRON II transmitter is furnished in a NEMA 1 aluminum enclosure with external, unitary plug in terminal strips
for ease of installation and removal. An optional junction box is available for applications requiring enclosed field wiring.
5
SECTION 3 – FEATURES
Summary of Contents for VELTRON II
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