Installation & Operation Manual
- Model VTS
Contents of this Manual are Subject to Change Without Notification
Page 4
SECTION 1 - INTRODUCTION
The VTS product family is intended for applications that require accurate and repeatable airflow
measurement with high turn-down for applications that have challenging inlet conditions. The
VTS incorporates a state-of-the-art vortex shedding digital transmitter with an intuitive user-
interface software known as the AccuStation Insight.
1.1
Theory of Operation (Reference the Diagram Below)
The AccuStation
®
divides the airflow into two equal chambers using an airfoil shaped
compression section. As air enters the chambers it accelerates and compresses, creating an
ideal condition for measuring airflow velocity. The vortex shedding airflow sensors provide a
highly repeatable digital pulse-train with a frequency that is directly proportional to the air flow
velocity in each chamber of the AccuStation.
The digital pulses generated by each vortex shedding sensor are used to calculate the total
airflow volume flowing through the AccuStation. The transmitter provides a software-
selectable analog output signal that is directly proportional to the total airflow volume
measurement. The airflow volume can also be provided directly to the building management
system’s
BACnet MS/TP network by ordering the optional BACnet MS/TP communications
module.
Field configuration is accomplished through AccuStation Insight, which is an intuitive user-
interface software. Connection between the VTS and the computer is provided through a USB
port located on the VTS transmitter or optional remote monitor.
1.2
Model Code
2 = 304SS, 20 GAUGE
3 = 316SS, 20 GAUGE
4 = ALUMINUM, 16 GAUGE
SIZE
06 = 06" DIAMETER
08 = 08" DIAMETER
10 = 10" DIAMETER
12 = 12" DIAMETER
14 = 14" DIAMETER
18 = 12"x18" RECTANGULAR
24 = 12"x24" RECTANGULAR
36 = 12"x36" RECTANGULAR
48 = 12"x48" RECTANGULAR
VTS
-
BLANK = NO OPTIONS
B = BACnet MS/TP
F = FLANGES
I = INSULATION
HOUSING MATERIAL
OPTIONS
SIZE
1.3
Accusation Types
Round AccuStation
Sizes 06, 08, 10, 12 and 14
Rectangular AccuStation
Sizes 18 and 24
Rectangular AccuStation
Sizes 36 and 48
