Micronics U1000MKII-HM User manual

Issue 3.1
U1000MKII
U1000MKII-FM: Clamp-on Ultrasonic Flow Meter
U1000MKII-HM: Clamp-on Ultrasonic Heat Meter
User Manual
U1000MKII-HM shown
Micronics Ltd, Knaves Beech Business Centre,
Davies Way, Loudwater, High Wycombe, Bucks HP10 9QR
Telephone: [phone] E-mail: [e-mail]
www.micronicsflowmeters.com

Micronics U1000MKII User Manual
Issue 3.1 July 19 Page i
CONTENTS
1INTRODUCTION ............................................................................................................................. 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
2INSTALLATION ............................................................................................................................... 6
2.1 Identify Suitable Location.................................................................................................... 6
2.1.1 Additional Considerations for Locating U1000MkII-HM ................................................ 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 (U1000MkII-FM only)........................................................................... 8
2.2.4 Modbus Connections (if fitted) ..................................................................................... 8
2.2.5 M-Bus Connections (if fitted)...................................................................................... 10
2.2.6 Temperature Sensor Probes (U1000-HM only).......................................................... 12
2.3 Switch On ......................................................................................................................... 14
2.3.1 U1000MkII-FM........................................................................................................... 14
2.3.2 U1000MkII-HM .......................................................................................................... 15
2.4 Adjust Flow Sensor Separation......................................................................................... 16
2.5 Apply Gel Pads................................................................................................................. 16
2.6 Clamp Sensor Assembly to Pipe....................................................................................... 16
2.6.1 Pipe Adaptors............................................................................................................ 17
2.6.2 Attaching to Pipe ....................................................................................................... 17
2.7 Remove Sensor-Holding Screws ...................................................................................... 18
2.8 Connect Electronics Module ............................................................................................. 19
2.9 Attach the Temperature Sensors (U1000MkII-HM Only)................................................... 19
2.10 Normal Operation ............................................................................................................. 21
2.10.1 U1000MkII-FM........................................................................................................... 21
2.10.2 U1000MkII-HM .......................................................................................................... 21
2.10.3 Troubleshooting the Flow Reading ............................................................................ 22
2.11 Clip Electronics Module to Sensor Assembly.................................................................... 22
3MENUS .......................................................................................................................................... 23
3.1 Accessing the Menus........................................................................................................ 23
3.2 Setup Menu ...................................................................................................................... 24
3.3 Modbus Menu................................................................................................................... 25
3.4 M-Bus Menu ..................................................................................................................... 25

U1000MKII User Manual Micronics
Page ii Issue 3.1 July 19
3.5 Current Output Menu (U1000MkII-FM only) ...................................................................... 26
3.6 Pulse Output Menu ........................................................................................................... 27
3.7 Calibration Menu .............................................................................................................. 28
3.8 Volume Totals Menu......................................................................................................... 28
3.9 Diagnostics Menu ............................................................................................................. 29
4OUTPUTS ...................................................................................................................................... 30
4.1 Pulse Output..................................................................................................................... 30
4.1.1 Volumetric Pulse........................................................................................................ 30
4.1.2 Frequency Mode........................................................................................................ 30
4.1.3 Energy Pulse (U1000MkII-HM only)........................................................................... 31
4.1.4 Flow Alarm - Low Flow .............................................................................................. 31
4.1.5 Flow Alarm –Signal Loss .......................................................................................... 31
4.2 4-20mA Current Output (U1000MkII-FM only) .................................................................. 31
4.3 Modbus (if fitted)............................................................................................................... 32
4.4 M-Bus (if fitted) ................................................................................................................. 35
4.4.1 Acknowledge Function............................................................................................... 35
4.4.2 Select Slave Function ................................................................................................ 36
4.4.3 Data Transfer Functions ............................................................................................ 36
4.4.4 REQ_UD2 –REQUEST DATA .................................................................................. 37
4.4.5 RSP_UD2 –RETURN DATA..................................................................................... 38
4.4.6 Switch Baud Rate Function........................................................................................ 39
4.4.7 Change Primary Address Function ............................................................................ 42
5RELOCATING THE UNIT........................................................................................................... 43
6APPENDIX..................................................................................................................................... 44
6.1 Specification ..................................................................................................................... 44
6.2 Default values................................................................................................................... 46
6.3 Limitations with Water-Glycol Mixtures ............................................................................. 46
6.4 Positioning........................................................................................................................ 46
6.5 Error and Warning Messages ........................................................................................... 48
6.5.1 Error Messages ......................................................................................................... 48
6.5.2 Example Error Messages........................................................................................... 48
6.5.3 Modbus Error Messages (if Modbus fitted) ................................................................ 49
6.5.4 Flow Errors ................................................................................................................ 49
6.5.5 Flow Warnings........................................................................................................... 49
6.5.6 Data Entry Errors....................................................................................................... 50
7DECLARATION OF CONFORMITY......................................................................................... 51

Micronics U1000MKII User Manual
Issue 3.1 July 19 Page 1
1INTRODUCTION
1.1 General Description
This manual describes the installation and use of the two models in the U1000MkII range:
•U1000MkII-FM is an ultrasonic clamp-on flow meter for measuring flow rate and total flow with
a volume pulse output and optional Modbus, M-Bus or 4-20mA flow proportional output. It can
be used as a standalone meter or as part of an integral management system.
•U1000MkII-HM 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 U1000MKII-HM 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 - 24V DC/24V AC power supply
(7W/7VA minimum). The unit operates on steel, stainless steel, copper and plastic pipes with
internal diameter in the range 20mm (0.8”) to 165mm (6.5”) depending on the product purchased.
The models can also be supplied with Modbus or M-Bus digital communication options.
Typical applications:
U1000MkII-FM
U1000MkII-HM
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:
U1000MkII-HM units' default configuration are:
•Instrument Type: Heating
•Installation: Flow
•Fluid: Water
Flow and Return refer to the location of the flow measurement relative to flow circuit.

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1.2 How Does It Work?
The U1000MKII uses 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. This transmission goes first from the downstream (blue) transducer to the
upstream transducer (red) as shown in the upper half of Figure 1. The transmission is then made in
the reverse direction, being sent from the upstream transducer (red) to the downstream transducer
(blue) as shown in the lower half of Figure 1. The speed at which the ultrasound is transmitted
through the liquid is accelerated slightly by the velocity of the liquid through the pipe. The
subsequent time difference T1 –T2 is directly proportional to the liquid flow velocity.
With HM models, two temperature sensors measure the difference in temperature between the flow
and return of the flow system being monitored. The temperature difference, in combination with the
volume of water that has flowed through the system, is then used to calculate the energy transferred
to or from the water.
Figure 1 Principle of Transit-Time operation

Micronics U1000MKII User Manual
Issue 3.1 July 19 Page 3
1.3 Package Contents
The unit consists of two parts:
1. Sensor Assembly
Incorporating guide rails and two transducers for flow measurement.
2. Electronics Module
Consisting of the keypad and display, power, signal and comms connections. The Electronics
Module clips onto the Sensor Assembly.
In addition, the kit contains:
3. Adhesive gel pads (4) p/n 223-5003.
4. 2-part adaptors for fixing sensor assembly to pipes with an OD less than 60mm (2)
p/n 225-5005 (U1000 SMALL PIPE V CLAMP)
p/n 225-5009 (U1000 VERY SMALL CIRCLE PIPE CLAMP)
5. U1000MkII-HM only: Non-releasable stainless cable ties for temperature sensors (2)
p/n 223-5005
6. Quick release clamps for use with pipes with an OD of 25-70mm (2) p/n 225-5007.
7. Quick release clamps for use with pipes with an OD of 51-127mm (2) p/n 225-5001.
8. U1000MkII-HM only: PT100 temperature sensors with 3m cable (2)
p/n 231-5005.
9. Modbus/M-Bus cable (optional) p/n 194-5040.
The kit also contains a copy of this manual.
Figure 2 Package Contents
1
2
9
3
4
5
6
7
8

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1.4 Display
The U1000MKII display comprises:
•One 2-line x 16 character LCD with backlight
•Four tactile key switches
•Two LEDs
Figure 3 U1000MKII Display (HM model shown)
kWh (HM model)
Energy pulse signal
4-20mA (FM model)
4-20mA signal.
Pulse
Illuminated when the
Pulse, Frequency or
Alarm functions are
enabled.
Select
Selection key.
Choose between
options on the
display.
Decrease/Down
Decrement the
value of each
digit in numeric
entry fields.
Increase/Up
Increment the
value of each
digit in numeric
entry fields.
Enter
Enter displayed
selection/
terminate the
data entry.
Select menu or
exit to Flow
Reading screen.
Flow
Measured flow.
Signal strength
For accurate
results, must be
over 40%.
Flow Units
Units applicable to
measured flow.
Flow Direction
* Indicates positive
flow
! Indicates
reversed flow.

Micronics U1000MKII User Manual
Issue 3.1 July 19 Page 5
1.5 Quick Start Procedure
The following procedure summarises the steps required to set up the U1000MkII. Please refer to the
referenced sections for full details.
1. Identify a suitable location for the U1000MkII on a straight length of pipe clear of bends and
valves or similar obstructions (See pages 6 and 46).
2. Electronics Module:
a. Connect to a 12 to 24V DC or 24V AC power supply (7W/7VA minimum per
instrument) using the Blue and Brown wires. (See page 7).
b. Switch on and program to determine the correct separation code (See page 14/15).
3. Sensor Assembly:
a. Loosen but do not remove the two sensor-holding screws to lower the flow sensors
so they can slide along the Sensor Assembly’s internal guide rail (see page 16).
b. Set the flow sensors to the correct separation (see page 16).
c. Tighten the sensor-holding screws.
d. Apply the gel pads to the sensors (see page 16).
e. Mount the Sensor Assembly on to the pipe using the supplied hose clip
(see page 18).
If the pipe has an OD less than 60mm, use the adaptors provided (see page 17).
f. Remove the sensor-holding screws (See page 18).
4. Connect the two wires from the Sensor Assembly to the Electronics Module (see page 19).
DO NOT CLIP THE ELECTRONICS MODULE ONTO THE SENSOR ASSEMBLY AT THIS
STAGE. THE ELECTRONICS MODULE CAN BE FULLY CLIPPED DOWN LATER ONCE
ALL MEASUREMENTS HAVE BEEN CHECKED.
5. U1000MkII-HM only: Plug in the temperature sensors to the Electronics Module (see page 19)
and attach the PT100 sensors to the flow and return pipes (see Section 2.1.1, page 6).
6. Check that flow readings can be obtained (see page 21).
7. Clip the Electronics Module to the Sensor Assembly and tighten the side screw to complete
assembly (see page 22).
To use the Pulse Output features, see page 30.
To use the 4-20mA Output, see page 31 (U1000MkII-FM only).
To use the Modbus interface, see page 32. The address, data rate, and configuration of the
instrument must be set using the Modbus Menu (see page 25). The default address is 1, the default
data rate is 38400 baud, and the default Comms configuration is 8-None-2.
To use the M-Bus interface, see page 35. The primary address and data rate of the instrument must
be set using the M-Bus Menu (see page 25). The default primary address is 1, and the default data
rate is 9600 baud.

U1000MKII User Manual Micronics
Page 6 Issue 3.1 July 19
2INSTALLATION
2.1 Identify Suitable Location
We recommend a location where there is a straight length of pipe with no bends, constrictions or
obstructions within at least 10 times the pipe diameter upstream, and 5 times the pipe diameter
downstream.
Figure 4 Identifying a suitable location
IMPORTANT: DO NOT EXPECT TO OBTAIN ACCURATE RESULTS IF THE UNIT IS
POSITIONED CLOSE TO ANY OBSTRUCTION THAT DISTORTS THE UNIFORMITY OF THE
FLUID FLOW PROFILE (SEE PAGE 46). MICRONICS LTD ACCEPTS NO RESPONSIBILITY OR
LIABILITY IF PRODUCT HAS NOT BEEN INSTALLED IN ACCORDANCE WITH THESE
INSTRUCTIONS.
2.1.1 Additional Considerations for Locating U1000MkII-HM
For optimum reliability on boiler applications, the flow measurement needs to be made on the cold
side of the system. For optimum reliability in chiller applications, the flow measurement needs to be
made on the warmer side of the system.
Figure 5 Typical setup of U1000MkII-HM for boiler applications
UPSTREAM
10 x pipe
diameter
DOWNSTREAM
5 x pipe
diameter
U1000MkII
fluid flow

Micronics U1000MKII User Manual
Issue 3.1 July 19 Page 7
2.1.2 Clean the Pipe's Flow Sensor Contact Area
Prepare the pipe by degreasing it and removing any loose material or flaking paint in order to obtain
the best possible surface. A smooth contact between pipe surface and the face of the sensors is an
important factor in achieving a good ultrasound signal strength and therefore maximum accuracy.
U1000MkII-HM: The area of pipe where the temperature sensors are to be attached must be free of
grease and any insulating material. It is recommended that any coating on the pipe is removed so
that the sensor has the best possible thermal contact with the pipe.
2.2 Connect Power and Signal Cables
This section explains how to connect power and signal cables to the Electronics Module.
2.2.1 Power Supply
The U1000MKII will operate within the voltage range 12 - 24V DC/24V AC. The supply must have a
minimum rating of 7W/7VA per instrument. Connect the external power supply to the Brown and
Blue wires of the six-core cable.
External power supply must be class 2 rated.
IMPORTANT: IT IS THE RESPONSIBILITY OF THE INSTALLER TO CONFORM TO THE
REGIONAL VOLTAGE SAFETY DIRECTIVES WHEN CONNECTING THE U1000MKII TO A
POWER SUPPLY USING A MAINS-RATED TRANSFORMER.
The U1000MKII interface cable supplied is a 6-core cable for power, pulse output and 4-20mA (if
fitted) connections.
Figure 6 6-core main interface cable
The un-insulated wire is the connection to the screen of the cable and should be earthed for full
immunity to electrical noise.

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2.2.2 Pulse Output Connection
The isolated pulse output is provided by a SPNO/SPNC MOSFET relay which has a maximum load
current of 500mA and maximum load voltage of 24V AC/DC.
This output is suitable for SELV circuits only.
The pulse output is available at the White and Green wires. Electrically this is a Volt, or potential
free contact and, when selected as a low flow alarm, is configurable NO/NC.
2.2.3 Current Output (U1000MkII-FM only)
The isolated 4-20mA is a current source and can drive into a maximum load of 620Ω.
The 4-20mA current output is available at the Red and Black wires. The polarities are shown in
Figure 6.
The alarm current due to a flow outside the range specified or due to a loss of signal is set at
3.5mA.
This output is suitable for SELV circuits only.
2.2.4 Modbus Connections (if fitted)
A separate 4 core plug-in cable is provided for the Modbus connections.
This plugs into the Electronics Module near the power cable entry.
PIN
FUNCTION
COLOUR
1
MODBUS -ve
BLACK & BROWN
2
OPTIONAL GND
SCREEN
3
MODBUS +ve
BOTH WHITES
4
-
-
Figure 7 Modbus Connector Cable Part - Binder 99-9210-00-04 (Front View)
3
1
2
Whites
Screen

Micronics U1000MKII User Manual
Issue 3.1 July 19 Page 9
Figure 8 Modbus cable wiring
NOTE: ENSURE THE WHITE WIRES ARE CORRECTLY ASSOCIATED WITH THE BLACK &
BROWN WIRES. THE BLACK/WHITE TWISTED PAIR IS FITTED WITH A BLACK SLEEVE TO
DISTINGUISH BETWEEN THE BLACK/WHITE AND BROWN/WHITE PAIRS.
For reliable operation of a Modbus network the cable type and installation must comply with
requirements in the Modbus specification document:
“MODBUS over Serial Line Specification & Implementation guide V1.0”.
This output is suitable for SELV circuits only.
For full immunity to electrical interference the screen of the power/pulse output cable and Modbus
cable should be connected to Earth.

U1000MKII User Manual Micronics
Page 10 Issue 3.1 July 19
Figure 9 Modbus wiring diagram
2.2.5 M-Bus Connections (if fitted)
A separate 4 core plug-in cable is provided for the M-bus connections.
This plugs into the Electronics Module near the power cable entry.
PIN
FUNCTION
COLOUR
1
M-BUS
BLACK & BROWN
2
OPTIONAL GND
SCREEN
3
M-BUS
BOTH WHITES
4
-
-
Figure 10 M-Bus Connector Cable Part - Binder 99-9210-00-04 (Front View)
+V (+5V or +12V)
RS485+
RS485-
GND (0V)
120Ω
270Ω
270Ω for +5V, 1KΩ for +12V
Screen
U1000-Mk2
Brown
White
Black
U1000-Mk2
Spur Length
Cables of any specified length can be supplied to order.
Isolated
RS-485
+
-
Screen
Isolated
RS-485
0V
+
-
Screen
0V
White
Screen
Isolated
RS-485
0V
+
-
U1000-Mk2
Optional Ground
White
Black
White
White
Black
White
Brown
Brown
Spur Length
120Ω
Modbus Master
3
1
2
Whites
Screen

Micronics U1000MKII User Manual
Issue 3.1 July 19 Page 11
Figure 11 M-Bus cable wiring
NOTE: ENSURE THE WHITE WIRES ARE CORRECTLY ASSOCIATED WITH THE BLACK &
BROWN WIRES. THE BLACK/WHITE TWISTED PAIR IS FITTED WITH A BLACK SLEEVE TO
DISTINGUISH BETWEEN THE BLACK/WHITE AND BROWN/WHITE PAIRS.
For reliable operation of a M-bus network the cable type and installation must comply with
requirements in the M-bus specification document:
Meter Communication Twisted Pair Baseband (M-Bus) Physical and Link Layer
For full immunity to electrical interference the screen of the power/pulse output cable and M-Bus
cable should be connected to Earth.

U1000MKII User Manual Micronics
Page 12 Issue 3.1 July 19
Figure 12 M-Bus wiring diagram
2.2.6 Temperature Sensor Probes (U1000-HM only)
Two separate 4-core plug-in cables are provided for the Temperature Sensor Probes connections.
These plug into the right-hand side of the Electronics Module.
U1000-Mk2
M-Bus
Master
Brown
White
Black
U1000-Mk2
Spur Length
Cables of any specified length can be supplied to order.
Isolated
M-Bus
Screen
Isolated
M-Bus
0V
Screen
0V
White
Screen
Isolated
M-Bus
0V
U1000-Mk2
Optional Ground
White
Black
White
White
Black
White
Brown
Brown
Spur Length

Micronics U1000MKII User Manual
Issue 3.1 July 19 Page 13
Figure 13 U1000-HM Temperature Probe Wiring
U1000-HM
COLD
HOT
White
White
Red
Red
White
White
Red
Red
U1000-HM Temperature Probe Wiring
4
3
1
2
Solder pin side

U1000MKII User Manual Micronics
Page 14 Issue 3.1 July 19
Switch On
The initial screen sequence is different for the FM and HM models.
2.2.7 U1000MkII-FM
Switch on the power to the Electronics Module. A Micronics start-up screen is displayed for 5
seconds followed by hardware and software version information.
You are then prompted to enter the internal diameter of
the pipe:
Use the , and keys to change the value.
Press to confirm the value.
Select the pipe material by using the and keys
to scroll through the list.
Press to confirm the material.
Select the fluid using the key.
Press to confirm the fluid name.
The unit now shows the correct flow sensor separation (in
this case, “B2”) for the chosen values of pipe ID, pipe
material and fluid.
Make a note of the separation code.
All subsequent start-ups will use the same configuration. If the configuration needs to be changed
for any reason, use the password-controlled menu (see page 23).
Continue with the installation of the Sensor Assembly (see page 16).
Enter Pipe ID :
050.0 mm
Select Material:
Steel
Instrument Fluid
Glycol | Water
Set Separation:
B 2

Micronics U1000MKII User Manual
Issue 3.1 July 19 Page 15
2.2.8 U1000MkII-HM
Switch on the power to the Electronics Module. A Micronics start-up screen is displayed for 5
seconds followed by hardware and software version information.
You are then prompted to enter the internal diameter of
the pipe:
Use the , and keys to change the value.
Press to confirm the value.
Select the pipe material by using the and keys
to scroll through the list.
Press to confirm the material.
Select the instrument setting using .
The unit is preconfigured for Heating applications.
Press to confirm the setting.
Select which side the electronics unit is installed using:
.
The unit is preconfigured for Flow.
Press to confirm the setting.
Select the fluid using .
Press to confirm the fluid name.
The unit now shows the correct flow sensor separation (in
this case, “D-3”) for the chosen values of pipe ID, pipe
material and fluid.
Make a note of the separation code.
All subsequent start-ups will use the same configuration. If the configuration needs to be changed
for any reason, use the password-controlled menu (see page 23).
Continue with the installation of the Sensor Assembly (see page 16).
Enter Pipe ID :
050.0 mm
Pipe Material:
Plastic
Instrument Type:
Heating|Chiller
Instrument Side:
Return|Flow
Instrument Fluid
Glycol|Water
Set Separation:
D-3

U1000MKII User Manual Micronics
Page 16 Issue 3.1 July 19
2.3 Adjust Flow Sensor Separation
Using the separation code displayed by the Electronics Module (see page 14/15), take the Sensor
Assembly and adjust the flow sensor separation accordingly:
Figure 14 Loosen the flow sensor-holding screws (left); slide to correct position (right)
1. Undo the screws 2-3 turns, sufficiently to loosen the flow sensors and allow sideways
movement. DO NOT fully unfasten or remove the screws at this stage.
2. Slide the flow sensors to the positions indicated on the display (e.g. “D5”).
3. With the flow sensors in the correct positions, tighten the sensor-holding screws so that the
sensors are secure.
2.4 Apply Gel Pads
1. Apply a gel pad centrally onto the bases of each of the two flow sensors.
2. Remove the covers from the gel pads.
3. Ensure there are no air bubbles between each pad and sensor base.
Figure 15 Applying the gel pads
2.5 Clamp Sensor Assembly to Pipe
The next step involves clamping the Sensor Assembly onto the pipe. Ensure that you have selected
a suitable location (see pages 6 and 46) and that the pipe is clean (see page 7). If you are installing
the unit on a pipe with an outside diameter less than 60mm use one or more of the adaptors
supplied with the unit.