UFM2/UBT
UFM2: Clamp-on Ultrasonic Flow Meter
UBT: Clamp-on Ultrasonic Heat Meter
User Manual
UBT shown
DWYER INSTRUMENTS, INC.
102 INDIANA HWY 212 Phone: 219-879-8000
MICHIGAN CITY Fax: 219-872-9057
INDIANA 46360 Web: www.dwyer-inst.com
USA Email:
[email protected]
Issue 1.1
UFM2/UBT User Manual
CONTENTS
1 INTRODUCTION ....................................................................................... 1
1.1 General Description ............................................................................................................ 1
1.2 How Does It Work? ............................................................................................................. 2
1.3 Package Contents .............................................................................................................. 3
1.4 Display................................................................................................................................ 4
1.5 Quick Start Procedure ........................................................................................................ 5
2 INSTALLATION......................................................................................... 6
2.1 Identify Suitable Location .................................................................................................... 6
2.1.1 Additional Considerations for Locating UBT ................................................................. 6
2.1.2 Clean the Pipe’s Flow Sensor Contact Area ................................................................ 7
2.2 Connect Power and Signal Cables ..................................................................................... 7
2.2.1 Power Supply .............................................................................................................. 7
2.2.2 Pulse Output Connection ............................................................................................. 8
2.2.3 Current Output (UFM2 only) ........................................................................................ 8
2.2.4 Modbus Connections (if fitted) ..................................................................................... 8
2.2.5 Temperature Sensor Probes (UBT only) .................................................................... 10
2.3 Switch On ......................................................................................................................... 11
2.3.1 UFM2 ........................................................................................................................ 11
2.3.2 UBT ........................................................................................................................... 12
2.4 Adjust Flow Sensor Separation ......................................................................................... 13
2.5 Apply Gel Pads ................................................................................................................. 13
2.6 Clamp Sensor Assembly to Pipe....................................................................................... 14
2.6.1 Pipe Adaptors ............................................................................................................ 14
2.6.2 Attaching to Pipe ....................................................................................................... 15
2.7 Remove Sensor-Holding Screws ...................................................................................... 16
2.8 Connect Electronics Module ............................................................................................. 16
2.9 Attach the Temperature Sensors (UBT Only).................................................................... 17
2.10 Normal Operation ............................................................................................................. 18
2.10.1 UFM2 ........................................................................................................................ 18
2.10.2 UBT ........................................................................................................................... 18
2.10.3 Troubleshooting the Flow Reading ............................................................................ 19
2.11 Clip Electronics Module to Sensor Assembly .................................................................... 19
3 MENUS.................................................................................................... 20
3.1 Accessing the Menus........................................................................................................ 20
3.2 Setup Menu ...................................................................................................................... 21
3.3 Modbus Menu ................................................................................................................... 22
Issue 1.1b July 20 Page i
UFM2/UBT User Manual
3.4 Current Output Menu (UFM2 only).................................................................................... 23
3.5 Pulse Output Menu ........................................................................................................... 24
3.6 Calibration Menu .............................................................................................................. 25
3.7 Volume Totals Menu ......................................................................................................... 26
3.8 Diagnostics Menu ............................................................................................................. 27
4 OUTPUTS ................................................................................................ 28
4.1 Pulse Output ..................................................................................................................... 28
4.1.1 Volumetric Pulse........................................................................................................ 28
4.1.2 Frequency Mode........................................................................................................ 29
4.1.3 Energy Pulse (UBT only) ........................................................................................... 29
4.1.4 Flow Alarm - Low Flow .............................................................................................. 29
4.1.5 Flow Alarm – Signal Loss .......................................................................................... 29
4.2 4-20 mA Current Output (UFM2 only, if fitted) ................................................................... 29
4.3 Modbus (if fitted) ............................................................................................................... 30
5 RELOCATING THE UNIT......................................................................... 33
6 APPENDIX .............................................................................................. 34
6.1 Specification ..................................................................................................................... 34
6.2 Default values ................................................................................................................... 36
6.3 Limitations with Water-Glycol Mixtures ............................................................................. 36
6.4 Positioning ........................................................................................................................ 36
6.5 Error and Warning Messages ........................................................................................... 38
6.5.1 Error Messages ......................................................................................................... 38
6.5.2 Example Error Messages........................................................................................... 38
6.5.3 Modbus Error Messages (if Modbus fitted) ................................................................ 39
6.5.4 Flow Errors ................................................................................................................ 39
6.5.5 Flow Warnings ........................................................................................................... 39
6.5.6 Data Entry Errors ....................................................................................................... 40
Page ii Issue 1.1b July 20
UFM2/UBT User Manual
1 INTRODUCTION
1.1 General Description
This manual describes the installation and use of the UFM2 flow meter and UBT energy meter:
• UFM2 is an ultrasonic clamp-on flow meter for measuring flow rate and total flow with a volume
pulse output and optional Modbus or 4-20 mA flow proportional output. It can be used as a
standalone meter or as part of an integral management system.
• UBT is an ultrasonic clamp-on thermal, heat/energy meter. It uses ultrasound to measure flow
rate and is also equipped with PT100 temperature sensors to measure flow and return
temperatures. The energy meter displays energy rate and totalised energy with pulse output
and communication options, so it can be used as a standalone meter or as an integral part of
Automatic Monitoring & Targeting (aM&T) or a Building Energy Management System (BEMS).
The electronics and sensor housings form an integral unit which attaches to the pipe using the
supplied hose clips. Power to the unit is provided by an external 12-24 VDC / 24 VAC power supply
(7 W / 7 VA minimum). The unit operates on steel, stainless steel, copper and plastic pipes with
internal diameter in the range 0.8” (20 mm) to 6.5” (165 mm) depending on the product purchased.
The models can also be supplied with Modbus digital communication options.
Typical applications:
UFM2 UBT
Hot water metering and flow measurement Hot water metering and flow measurement
Flow measurement for heat metering Flow measurement for Energy Metering
Chilled water metering and flow measurement Chilled water metering and flow measurement
Potable water metering and flow measurement
Process water metering and flow measurement
Ultra-pure water metering and flow
measurement.
NOTE:
The UBT default configuration is:
• Instrument Type: Heating
• Installation Side: Return
• Fluid: Water
Return refers to the location of the flow measurement relative to flow circuit.
Issue 1.1b July 20 Page 1
UFM2/UBT User Manual
1.2 How Does It Work?
The UFM2 and UBT meters use a cross correlation transit time algorithm to provide accurate flow
measurements.
An ultrasonic beam of a given frequency is generated by applying a repetitive voltage pulse to the
transducer crystals.…
