Air Monitor VELTRON III Quick Start Manual

3. FIELD CHARACTERIZATION

The VELTRON III is equipped with a field characterization (K-factor) feature which allows for the introduction of
gain and/or bias factors into the transmitter's flow calculations. This feature is intended to be used in two types of
applications:
I. To adjust for flow measurement error as a result of highly distorted airflow induced by upstream or downstream
flow disturbances.
II. 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 III can calculate these values based on
measured and reference values from a 1, 2, or 3 point airflow traverse.
For best results, Air Monitor recommends at least 2 velocity points be used to characterize the installation, with one
velocity reading taken in the bottom 1/3 of the operating range. When making this measurement, it is essential that
the velocity measurement be within the operating range of the Veltron III and airflow sensor. The Veltron III can
simultaneously display flow velocity in actual and standard conditions. Before airflow traverse readings are taken,
temporarily reconfigure the display to show both velocity readings and make sure the airflow velocity does not exceed
the airflow sensor cutoff before any airflow traverse readings are taken.
Number of Points
The number of data points (1-3) to be used for field characterization.
3 Points - For point 1, enter a flow rate or velocity that is in the bottom third of
Characterization Calculator the operating range. For point 2, enter a flow value that is in the middle third of
the operating range. For point 3, enter a flow value that is in the upper third of
Number of Points 3
the operating range.
Flow Data Points
Reference Vel III Points
Point 1 0.0 0.0
Point 2 0.0 0.0
Point 3 0.0 0.0
ENT - Accept ESC - Leave UP/DN - Change
If you select the manual option in the field characterization menu, you will be

Manual Characterization

provided with data entry fields for manually entering exponent and gain values.
This data will be calculated and provided by the balancer or others.
Exponent 0.500
Gain 1837.0
ENT - Accept ESC - Leave UP/DN - Change
Visit the VELTRON III product page for
more information.
11451 Belcher Road South • Largo, FL 33773 • USA • +1 (727) 447-6140
www.airmonitor.com/hvac/ • hvacsales@airmonitor.com
QUICK START GUIDE
VELTRON III - Pressure & Flow Transmitter
INSTALLATION PROCEDURE

STEP 1: UNPACKING

PACKING LIST

• VELTRON III Transmitter
• RTD Temperature Sensor (Up to 2 if selected upon ordering)
• Quick Start Guide
• Factory Setup Sheet
INSPECTION & HANDLING
Veltron III should be carefully inspected for damage prior to Installation. Report damage to your freight department or
contact the delivery carrier.

WARRANTY

Air Monitor Corporation (Herinafter referred to as "Seller") warrants that at the time of shipment, products sold pursuant
to this contract will be free from defects in materials and workmanship, and will conform to the specifications furnished or
approved in writing by the Seller. Please refer to Conditions of Sale on the Air Monitor website for more information.

STEP 2: MECHANICAL INSTALLATOIN

Find an easily accessible location where electrical connections can be made and display readings can be taken from the
floor level. The mounting surface must be structurally sound and capable of withstanding a minimum weight of 10lbs
(4.5kg). Use the following screws for mounting.
For NEMA 1 Enclosure:
(4) Machine screws - #8-32 x 1.5"
(4) Wood screws - #8 x 1.5"
(4) Concrete screws - 0.1875" x 1.5"
Install the pressure or flow sensor per manufacturer recommendations. Use the table below to determine the appropriate
sensor tubing diameter based on the distance from the enclosure to the airflow sensors. Contact Air Monitor for assistance
if longer tubing lengths are required.
Nominal/Min Tubing Internal Tube Length Total (ft)
Diameter (in)
⅛ (0.125)
³⁄₁₆ (0.1875)
¼ (0.25)
⅜ (0.375)
DOC-0005932
For NEMA 4X Enclosure:
(4) Machine screws - HHMS 0.25-20 x 1.5"
(4) Wood screws - FHLS 0.25 x 1.5"
(4) Concrete screws - HHCS 0.25 x 1.5"
Sensor Max Distance from
Transmitter (ft)
30 15
200 100
500 250
1000 500
Rev. B