Micronics U1000MKII FM User Manual
Micronics U1000MKII-FM User Manual
Issue 2.0 June 18 Page 1
U1000MKII FM
Ultrasonic Flowmeter
User Manual
Micronics Ltd, Knaves Beech Business Centre, Davies Way, Loudwater,
High Wycombe, Bucks HP10 9QR
Telephone: +44(0)1628 810456 E-mail: sales@micronicsltd.co.uk
www.micronicsflowmeters.com
Micronics U1000MKII-FM User Manual
Issue 2.0 June 18 Page 2
Contents
1 General Description ...................................................................................................................................... 3
2 Quick start procedure ................................................................................................................................... 4
3 How does it work? ........................................................................................................................................ 5
4 User interface ............................................................................................................................................... 6
4.1 Key switches ........................................................................................................................................ 6
5 Installing the U1000MKII-FM ........................................................................................................................ 7
5.1 Preparation .......................................................................................................................................... 8
5.2 Sensor separation ................................................................................................................................ 8
5.3 Adaptors for small pipes .................................................................................................................... 10
5.4 Attaching the U1000MKII-FM to the pipe ......................................................................................... 11
5.5 U1000MKII-FM Interface Cables ....................................................................................................... 12
5.6 Connecting the U1000MKII-FM to the Supply................................................................................... 12
5.7 Pulse Output connection ................................................................................................................... 13
5.8 Current Output (If fitted) .................................................................................................................. 13
5.9 ModbusConnections (if fitted) .......................................................................................................... 13
5.10 Cable Screen ...................................................................................................................................... 13
6 Powering up for the first time .................................................................................................................... 14
6.1 How to enter the Pipe ID ................................................................................................................... 15
6.2 Pulse output ...................................................................................................................................... 16
6.2.1 Volumetric mode ....................................................................................................................... 16
6.2.2 Frequency mode ........................................................................................................................ 16
6.2.3 Flow Alarm - High/Low Flow or Signal loss ................................................................................ 17
6.3 4-20mA Current Output (if fitted) ..................................................................................................... 17
6.4 Modbus .............................................................................................................................................. 18
7 Subsequent Power-ON Sequence .............................................................................................................. 20
8 Password Controlled Menus ...................................................................................................................... 20
9 General Procedure for changing menu settings ......................................................................................... 20
9.1.1 Selection menus ......................................................................................................................... 20
9.1.2 Data entry menus ...................................................................................................................... 21
9.2 User Password controlled menu structure........................................................................................ 21
10 Diagnostics Menu ....................................................................................................................................... 27
11 Relocation of guide rail ............................................................................................................................... 28
12 Appendix I – U1000MKII-FM Specification ................................................................................................. 29
13 Appendix II – Default values ....................................................................................................................... 30
14 Appendix III – Error and Warning Messages .............................................................................................. 31
15 Declaration of Conformity .......................................................................................................................... 34
Micronics U1000MKII-FM User Manual
Issue 2.0 June 18 Page 3
1 General Description
• Fixed installation, clamp-on flowmeter
• Easy to install
• Requires the minimum of information to be entered by the user
• Both the electronics and guide rail housings form an integral unit
• Simple attachment to the pipe using the supplied jubilee clips
• Power to the unit is provided by an external 12 - 24V ac/dc power supply (7VA minimum)
• 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.
• Compact, rugged and reliable, the U1000MK-FM has been designed to provide sustained
performance in industrial environments
U1000MKII-FM standard features include:
▪ 2 line x 16 character LCD with backlight
▪ 4-key keypad
▪ Isolated pulse output
▪ Universal guide rail for setting pre-assembled transducers
▪ Two sets of self- adhesive Gel pad acoustic couplant
▪ Continuous signal monitoring
▪ Password protected menu operation for secure use
▪ Operates from external 12 to 24Vac or dc power supplies
▪ Small pipe adaptors
Options
• Pipe range
➢ 20mm inside diameter to 114mm inside diameter pipe
➢ 115mm inside diameter to 165mm inside diameter pipe
• 4-20mA current output
• Modbus output
• Pulse output is standard
Typical applications
▪ Hot water metering and flow measurement
▪ Flow measurement for Heat Metering
▪ 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.
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Issue 2.0 June 18 Page 4
2 Quick start procedure
The following procedure details the steps required to set up the flow meter. See the sections
referred to if you are unsure about how to install the instrument.
1. Wire the electronics up to a 12 to 24V ac or dc power supply (7VA minimum per instrument)
via the Blue and Brown wires. (See Section 5.6)
2. Establish a suitable location for the flow meter on a straight length of pipe clear of bends and
valves or similar obstructions. (See Sections 5 and 5.1)
3. Determine the pipe internal diameter and material.
4. Either use the table in the manual, or power up the instrument to determine the correct
separation code. (See Sections 5.2 or 6)
5. Set the sensors to the correct separation by adjusting the sensor holding screws so the
sensor can slide in the slot. (See Section 5.2)
6. Select any adaptors needed for pipes with an outside diameter of less than 60mm, inside
diameter will typically be less than 50mm. (See Section 5.3)
7. Apply the Gel pads or couplant to the sensors and mount the guide rail on the pipe using the
banding provided, then remove the sensor holding screws. (See Section 5.4)
8. Plug in the flow sensors and DO NOT clip the electronics assembly on to the guide rail at
this stage.
9. Power up the instrument and check that flow readings can be obtained (See Sections 6 and
7)
10. Once good readings have been obtained any further changes, such as selecting different
units, can be made via the Password Controlled Menu. (See Section 8)
11. When happy with set up and readings, clip the electronic assembly to the guide rail, and
tighten screw to complete assembly
12. If the Modbus interface is being used then the address, and data rate, and configuration of
the instrument must be set using the modbus Menu. (See Section 6.4). The default address
is 1, the default data rate is 38400 baud, and the default comms configuration is 8-None-2.
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Issue 2.0 June 18 Page 5
3 How does it work?
The U1000MKII-FM is a clamp-on, ultrasonic flowmeter that 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.
Figure 1 Principle of Transit-Time operation
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Issue 2.0 June 18 Page 6
4 User interface
Figure 2 illustrates the U1000MKII-FM user interface comprising:-
• One 2 line x 16 character LCD with backlight
• Four tactile key switches
• Two LEDs
4.1 Key switches
4-20mA LED is illuminated when the 4-20mA output is enabled.
Pulse LED is illuminated when the Pulse, Frequency or Alarm functions are enabled.
Selection key. Allows the user to select between options on the
display.
Used to increment the value of each digit in numeric entry fields.
Used to decrement the value of each digit in numeric entry
fields.
Used to enter the selection displayed or terminate the data
entry. Pressing this key will take the user to another menu or to
the Flow Reading screen.
Figure 2 U1000MKII-FM User Interface
V
Λ
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Issue 2.0 June 18 Page 7
5 Installing the U1000MKII-FM
Figure 3 Location of Transducers
In many applications an even flow velocity profile over a full 360° is unattainable due, for example,
to the presence of air turbulence at the top of the flow and also possibly sludge at the bottom of the
pipe. Experience has shown that the most consistently accurate results are achieved when the
transducer guide rails are mounted at 45°with respect to the top of the pipe.
The U1000MKII-FM equipment expects a uniform flow profile as a distorted flow will produce
unpredictable measurement errors. Flow profile distortions can result from upstream disturbance
such as bends, tees, valves, pumps and other similar obstructions. To ensure a uniform profile the
transducers must be mounted far enough away from any cause of distortion such that it no longer
has an effect.
To obtain the most accurate results the condition of both the liquid and the pipe must be suitable to
allow ultrasound transmission along the predetermined path. It is important that liquid flows
uniformly within the length of pipe being monitored, and that the flow profile is not distorted by any
upstream or downstream obstructions. This is best achieved by ensuring there is a straight length of
pipe upstream of the transducers of at least 20 times the pipe diameter, and 10 times the pipe
diameter on the downstream side, as shown in Figure 3. Flow Measurements can be made on
shorter lengths of straight pipe, down to 10 diameters upstream and 5 diameters downstream, but
when the transducers are mounted this close to any obstruction the resulting errors can be
unpredictable.
Key Point: Do not expect to obtain accurate results if the transducers are positioned close to any
obstruction that distorts the uniformity of the flow profile.
Micronics Ltd accepts no responsibility or liability if product has not been installed in accordance
with the installation instructions applicable to the product.
Possible Air
Possible
sludge
Guide
rail
Uniform Flow Profile
Distorted Flow Profile
Flow
Flow
Valid transducer location
20 x Diameter
10 x Diameter
45°
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Issue 2.0 June 18 Page 8
5.1 Preparation
1. Before attaching the transducers first ensure that the proposed location satisfies the distance
requirements shown in Figure 3 otherwise the resulting accuracy of the flow readings may be
affected.
2. 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
transducers is an important factor in achieving a good ultrasound signal strength and therefore
maximum accuracy.
5.2 Sensor separation
Depending on what pipe range has been purchased the sensor must be positioned at the correct
distance for the pipe size and type they will be used on. The table below gives the typical separation
code for a given pipe material and inside diameter, using a pipe wall thickness algorithm. The
instrument displays the required separation after the pipe internal diameter and material are
entered.
Pipe ID
Pipe ID
Water
Glycol
PipeID
Pipe ID
Water
Glycol
mm
inches
S/Steel
S/Steel
mm
inches
M/Steel
M/Steel
20-22
0.79-0.87
A-3
A-3
21-22
0.83-0.87
C-3
C-3
26-29
1.02-1.14
B-2
B-2
27
1.06
D-2
E-3
34-36
1.34-1.42
C-2
C-4
35-36
1.38-1.42
C-4
C-4
37-40
1.46-1.57
B-3
D-4
41-44
1.61-1.73
C-3
F-3
52-58
2.05-2.29
B-2
D-3
52-54
2.05-2.13
C-4
C-4
59-64
2.32-2.52
A-3
F-3
62-65
2.44-2.56
F-3
F-3
72-79
2.83-3.11
B-3
E-5
76-79
2.99-3.11
E-5
G-4
86-92
3.39-3.62
C-3
B-4
88-94
3.46-3.70
B-4
B-4
99-105
3.90-4.13
D-3
C-4
95-101
3.74-3.98
D-3
C-4
125-131
4.92-5.16
F-3
E-4
122-128
4.80-5.04
F-3
E-4
152-158
5.98-6.22
E-5
G-4
150-156
5.90-6.14
E-5
G-4
Pipe ID
Pipe ID
Water
Glycol
Pipe ID
Pipe ID
Water
Glycol
mm
inches
PVC U
PVC U
mm
inches
Copper
Copper
22-23
0.87-0.90
C-3
C-3
20-39
0.79-1.54
B-1
B-1
27-28
1.06-1.10
D-2
C-3
20-39
0.79-1.54
B-1
B-1
36-37
1.42-1.45
C-4
C-4
20-39
0.79-1.54
B-1
B-1
43-45
1.69-1.77
C-3
B-4
20-39
0.79-1.54
B-1
A-2
56-59
2.20-2.32
E-3
E-3
47-53
1.85-2.09
C-1
C-1
67-69
2.64-2.71
E-4
D-5
61-67
2.40-2.64
A-3
A-3
78-81
3.07-3.19
D-2
C-3
68-74
2.68-2.91
C-2
B-3
95-101
3.74-3.97
D-3
C-4
96-102
3.78-4.02
B-4
B-4
109-115
4.29-4.53
E-3
D-4
117-123
4.61-4.84
E-3
D-4
122-128
4.80-5.04
F-3
E-4
146-152
5.75-5.98
D-5
D-5
143-149
5.63-5.87
F-4
E-5
157-162
6.18-6.34
G-4
F-5
Figure 4 Separation Table
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The diagram below shows how to adjust the separation of the sensors
Figure 5 Separation Setting
NOTE. When the sensors have been moved to the correct setting and the guide rail is attached to
the pipe REMOVE the sensor holding screws, which will allow the spring loaded transducers to
make contact with the pipe.
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Issue 2.0 June 18 Page 10
5.3 Adaptors for small pipes
Figure 6 Pipe Adaptors
Adaptors are supplied for use on small pipes. The diagrams above show how these are fitted
around the pipe. The top pipe adaptor clips into the ends of the guide rail.
40 to 60mm outside diameter
Less than 40mm outside diameter
Greater than 60mm outside diameter
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Issue 2.0 June 18 Page 11
5.4 Attaching the U1000MKII-FM to the pipe
After applying the Gel pads centrally on the sensors, then follow the four steps shown in Figure 7
below to attach the U1000MKII-FM to the pipe.
Remove the covers from the Gel pads.
Ensure there are no air bubbles between pad
and sensor base.
Check separation distance table on page 8 or
program unit before clamping guide rail to
pipe, using the supplied banding. Then release
and REMOVE sensor locking screws.
Connect sensors to the electronics assembly
before applying power. Sensor leads can be
connected either way round.
Confirm the unit is working correctly before
attaching the electronic assembly onto guide
rail assembly.
Figure 7 simple steps to attaching the U1000MKII on the pipe
Note…The locking screws and washers should be kept in case it is necessary to change the
location of the guide rail and sensors. See the relocation section for the procedure to do this
.
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