Greystone Energy Systems AVDT Series User manual

Page 1
INTRODUCTION
The Air Flow and Velocity Transmitter series is
intended for use in commercial environments. It is
designed with a duct mount probe and adjustable
collar suitable for round or rectangular ducts.
The transmitter provides separate readings for
air velocity and temperature. It comes with three
measurement ranges in a single device (0–2 m/s,
0–10 m/s, 0–20 m/s) and is available with optional
display and relay.
BEFORE INSTALLATION
Read these instructions carefully before attempting to install, operate or service this device. Failure to
observe safety information and comply with instructions can result in personal injury, death and/
or property damage. Disconnect power before installing or servicing device and only use wiring with
insulation rated for full device operating voltage. Not for use in ammable or explosive environments.
MOUNTING
The transmitter should be mounted in an easily accessible location in a straight section of duct at least
ve feet from corners or other items that may cause disturbances in the air ow. Avoid areas where the
detector is exposed to vibrations or rapid temperature changes.
Once a suitable location is selected, use the mounting ange as a template and mark the locations of the
two screws needed to mount the transmitter. Pre-drill the holes in the duct and mount the ange with
screws (not included). See Figure 1.
Adjust the probe to the desired depth. Ensure that the end of the probe reaches the middle of the duct.
Tighten the screws on the ange to hold the probe in position. See Figure 2.
For proper mounting orientation in relation to air ow direction, see Figure 3.
WIRING
For CE compliance a properly grounded shielding cable is required. Unscrew the strain relief and route the
cable(s). Use the strain relief on the left for power in and signal out. Connect the wires as shown in Figure
4 and then tighten the strain relief.
Select the desired measurement range by
installing the jumpers as shown in Figure 5.
To congure the temperature output (Tout) and
velocity output (Vout) select the output mode,
current (mA) or voltage (V), by installing the
jumpers as shown in Figure 6. Both output types
are congured separately.
To congure the switching point (display required)
install a jumper to pins labeled sw.p. (switching
point) as shown in Figure 7. Press down on the
Figure 1
Figure 3Figure 2
Tighten screws
Insert probe
IN-GE-AVDTXXX-01 03/20 Copyright © Greystone Energy Systems, Inc. All Rights Reserved Phone: [phone] Web: www.greystoneenergy.com
Air Flow and Velocity
Transmitter
AVDT Series - Installation Instructions

Page 2
pushbutton to select the switching point (e.g. 5.05 m/s = NC) of the relay. The chosen value (m/s) is shown
on the display. Remove and store the jumper after the conguration is complete.
To congure the hysteresis (display required) install a jumper to pins labeled hyst. as shown in Figure 7.
Press down on the pushbutton to select the hysteresis of the relay switching point. The chosen value (m/s)
is shown on the display. Remove and store the jumper after the conguration is complete. The hysteresis
maximum setting is based on the range selected.
NOTE: The conguration jumpers must be removed and stored for proper operation.
Figure 4
Figure 5
Figure 6 Figure 7
NC
COM
NO
Tout
Vout
24 V
GND
Tout
Vout
24 V
GND
Analog Input 1
Analog Input 2
Power Supply
Common
Controller
NC
COM
NO
Jumper Placement Jumper (J1): Installed
Jumper (J2): Not installed
Range 2 (0-2 m/s)
Range 10 (0-10 m/s)
Range 20 (0-20 m/s)
Jumper (J1): Not installed
Jumper (J2): Installed
Jumper (J1): Installed
Jumper (J2): Installed
J1
J2
J1
J2
J1
J2
No jumper
Circuit open
Jumper installed
Circuit closed
Jumper stored
Temperature output (Tout): T = voltage (V)
Velocity output (Vout): V = voltage (V)
Temperature output (Tout): T = current (mA)
Velocity output (Vout): V = current (mA)
Temperature output (Tout): T = voltage (V)
Velocity output (Vout): V = current (mA)
Temperature output (Tout): T = current (mA)
Velocity output (Vout): V = voltage (V)
V mA
V mA
V mA
V mA
NC
COM
NO
Tout
Vout
24 V
GND
Push button
T
V
J1
J2
sw. p.
hyst
V mA
IN-GE-AVDTXXX-01 03/20 Copyright © Greystone Energy Systems, Inc. All Rights Reserved Phone: [phone] Web: www.greystoneenergy.com

PRINTED IN CANADA
Page 3
SPECIFICATIONS
Velocity Ranges..........................Base & Metric Models: 0-2m, 10 & 20m/s, eld selectable
Imperial Model: 0-400, 2000 & 4000 fpm, eld selectable
Velocity Accuracy ......................Metric: Range - 0...2 m/s: <0.2 m/s + 5% from reading
Range - 0...10 m/s: <0.5 m/s + 5% from reading
Range - 0...20 m/s: <1.0 m/s + 5% from reading
Imperial: Range - 0...400 fpm: <20 fpm + 5% from reading
Range - 0...2000 fpm: <100 fpm + 5% from reading
Range - 0...4000 fpm: <200 fpm + 5% from reading
Thermal Shift...............................±0.8 %FS / °C
Calibration ...................................Units calibrated at 22°C (71.6°F) Rapid thermal shift stabilization time 10 min.
Temperature Range..................0 to 50°C (32 to 122°F)
Temperature Accuracy ............<0.5°C for velocity >0.5 m/s (<0.9°F for V > 100 fpm)
Operating Conditions ..............0 to 50°C (32 to 122°F), 0 to 95 %RH, non-condensing
Storage Temperature ...............-20 to 70°C (-2 to 158°F)
Media Compatibility.................Dry air or non-aggressive gases
Output Signal 1 (Tout) .............0-10 V (linear to temperature) L min 1K Ω
4-20 mA (linear to temperature) L max 200 Ω
Output Signal 2 (Vout).............0-10 V (linear to m/s) L min 1K Ω
4-20 mA (linear to m/s) L max 400 Ω
Optional Relay Out....................Potential free SPDT (NC, COM, NO)
250 Vac, 6A / 30 Vdc, 6A adjustable switching point and hysteresis
Power Supply..............................24 Vdc / 24 Vac ±10%
Current Consumption..............Current: 75 mA (90 mA with relay)
Voltage: 35 mA (90 mA with relay)
Optional Display ........................4 digit LCD backlit display
Size: 45.7mm W x 12.7mm H (3.5" x 0.5")
Display Units ...............................Metric: m/s and °C
Imperial: fpm and °F
Enclosure......................................Case: ABS
Cover: Polycarbonate
Ratings: IP54 (NEMA 3)
Probe: 304 series stainless steel
Mounting Flange: LLPDP
Dimensions..................................Case: 90mm W x 71.5mm H x 36mm D (3.5” x 2.8” x 1.4”)
Probe: OD 10mm (0.394”), length 210mm (8.26”) from bottom of cover
Mounting......................................Mounting ange, Ø4mm (11/64")
Insertion Lenth with Flange ..Adjustable 50-180mm (2"-7.08")
Electrical Connections.............Power Supply & Signal Out: 4-screw terminal block 12-24 AWG (0.2-1.5mm2)
Relay Out: 3-screw terminal block 12-24 AWG (0.2-1.5 mm2)
Cable Entry ..................................M16 (0.625") cable gland
Weight...........................................220g (7.76oz)
Approvals .....................................CE, RoHS
Country of Origin.......................Finland
DIMENSIONS
90mm
3.54”
71.5mm
2.81”
36mm
1.41”
15mm
0.59”
95mm
3.74”
70mm
2.75”
210mm
8.26”
IN-GE-AVDTXXX-01 03/20 Copyright © Greystone Energy Systems, Inc. All Rights Reserved Phone: [phone] Web: www.greystoneenergy.com