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SERIES UBT | CLAMP-ON ULTRASONIC THERMAL ENERGY METER
®
FEATURES/BENEFITS
• Non-invasive energy measurement
• Easy installation: simply connect power and enter the pipe inside diameter, adjust the sensors and clamp the meter on the pipe
• Compact and lightweight design, featuring an easily installed, all-in-one clamp-on unit intended for homogeneous liquids that
contain no air
• Screen displays energy rate and totalized energy with pulse output and communication options
DESCRIPTIONAPPLICATIONS
• Building services
• Energy management
• Heat/energy metering for energy management or building services
utilizing chilled water circuits
The Series UBT Clamp-On Ultrasonic Thermal Energy Meter is an
economical clamp-on ultrasonic heat meter. It is an ultrasonic alternative
to the traditional inline thermal energy meters. The series uses
temperature sensors for energy measurement and ultrasonic waves with
time differentials for ow measurement.
SPECIFICATIONS
Service Clean water with <3% by volume of particulate content, or up to 30% ethylene glycol.
Range 0.3 ft/s to 32 ft/s (0.1 m/s to 10 m/s).
Display Backlit: Active area 2.28˝ x 0.43˝ (58 mm x 11 mm), 2 line x 16 characters.
Accuracy ±3% of ow reading for velocity rate >1 ft/s (0.3 m/s).
Power Requirements 12 V to 24 V ±10% AC/DC at 7 watts per unit. Optional plug-in 12 V power supply.
Power Consumption 7 W (DC) or 7 VA (AC) max.
Temperature Limits Process: 32 to 185°F (0 to 85°C); Ambient: 32 to 122°F (0 to 50°C).
Outputs Pulse: 1 optoisolated MOSFET relay, 500 mA max, 166 pps max, 200 Hz max.
Humidity Limit 90% RH at 122°F (50°C) max.
Communication Pulse, Optional Modbus® communication.
Enclosure Rating IP54.
Enclosure Material Plastic polycarbonate.
Repeatability ±0.15% of measured value.
Electrical Connections 16.4´ (5 m) cable.
Flow Direction Any.
Mounting Orientations Any.
Weight 1.10 lb (0.5 kg).
Agency Approvals CE.
ADDITIONAL SPECIFICATIONS
Applicable Pipe Material Steel, SS, copper, or plastic.
Pipe Outside Diameter 3/4 to 4˝ (25 to 115 mm); 5 to 7˝ (125 to 180 mm).*
Applicable Pipe Lining None.
Pipe Wall Thickness 0.02 to 0.36˝ (0.5 to 10 mm).
*Pipe size is dependent on pipe material and internal diameter.
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DIMENSIONS WIRING DIAGRAM
BROWN
2
FEMALE
UFM2/UBT
UFM2/UBT
UFM2/UBT
-+
UN-INSULATED SCREEN
4-20 mA
MODBUS
-ve CONNECTIONS
OPTIONAL GROUND SCREEN
SMB COAXIAL
CONNECTORS
16.4´ [5 M]
BROWN
RS485+
RS485-
BLUE
WHITE
BLACK
RED
GREEN
1-31/64
2-1/32
[37.90]
[51.40]
270Ω FOR +5 V, 1KΩ FOR +12 V
120Ω
270Ω
RED
BLACK
GREEN
WHITE
BLUE
SHIELD
MODBUS® COMMUNICATION MASTER
+V [+5 V
OR +12 V]
GND [0V]
8-5/16 [211.18]
WHITE
BLACK
BROWN
WHITE
8-15/64 [209.00]
WHITE
BLACK
BROWN
2 X 1
[25.50]
OPTIONAL
GROUND
WHITE
1-27/32
[47.00]
1-25/64
[35.40]
1-59/64
BROWN
[48.90]
WHITE
BLACK
120Ω
WHITE
+ OUTPUT [IF FITTED]
4-20 mA - OUTPUT [IF FITTED]
1-27/3
[46.80]
Pin Function Color
1
Modbus®
communication -ve
2
Optional GND
3
Modbus®
communication +ve
4
-
PULSE RETURN
PULSE OUTPUT
12/24 V INPUT
12/24 V RETURN
6-core main interface cable wiring
Black and brown
Screen
1
Both whites
-
Modbus® communication connector cable
SCREEN
WHITES
32
SCREEN
-+
0V
ISOLATED
RS-485
SCREEN
SPUR LENGTH
-+
0V
ISOLATED
RS-485
SCREEN
0V
ISOLATED
RS-485
Recommended Modbus® communication wiring
HOW TO ORDER
Use the bold characters from the chart below to construct a product code.
UBT -1 4
SERIES
UBT: Clamp-on ultrasonic thermal energy meter
OUTPUT TYPE
-1: Pulse output only
-2: Pulse and Modbus® communication
®
COMMUNICATIONS
MODBUS® COMMUNICATIONS
+ve CONNECTIONS
Modbus® communication cable wiring
PIPE SIZE
4: 3/4 to 4˝ (25 to 115 mm)
6: 5 to 7˝ (125 to 180 mm)
Modbus® is a registered trademark of Schneider Automation, Inc.
©Copyright 2020 Dwyer Instruments, Inc.
Printed in U.S.A. 11/20 DS-UBT
Important Notice: Dwyer Instruments, Inc. reserves the right to make changes to or discontinue any product or service identied in this publication without notice. Dwyer advises its customers to obtain the
latest version of the relevant information to verify, before placing any orders, that the information being relied upon is current.
DWYER INSTRUMENTS, INC.
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