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Micronics U1000 User Manual

Ultrasonic flowmeter
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Micronics
Micronics Ltd, Knaves Beech Business Centre, Davies Way, Loudwater,
Telephone: +44(0)1628 810456
Issue 2.0
Micronics U1000
Ultrasonic Flowmeter
User Manual
High Wycombe, Bucks HP10 9QR
Facsimile: +44(0)1628 531540
www.micronicsflowmeters.com
U1000 User Manual
E-mail:
sales@micronicsltd.co.uk
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  • Page 1 Micronics U1000 User Manual Micronics U1000 Ultrasonic Flowmeter User Manual Micronics Ltd, Knaves Beech Business Centre, Davies Way, Loudwater, High Wycombe, Bucks HP10 9QR Telephone: +44(0)1628 810456 Facsimile: +44(0)1628 531540 E-mail: sales@micronicsltd.co.uk www.micronicsflowmeters.com Issue 2.0 Page 1...

  • Page 2: Table Of Contents

    User interface ..........................5 Key switches ..........................5 Installing the U1000 ........................5 Preparation ..........................6 Attaching the U1000 to the pipe .................... 7 Adaptors for small pipes ......................8 U1000 interface cable ......................9 Connecting the U1000 to the Supply ..................9 Pulse Output connection ......................

  • Page 3: General Description

    Power to the unit is provided by an external 12 - 24V ac/dc power supply. The U1000 is intended to operate on steel and plastic pipes with ID’s in the range 20mm (0.8”) to 110mm (4”).

  • Page 4: How Does It Work

    Micronics U1000 User Manual 2 How does it work? The U1000 is a clamp-on, ultrasonic flowmeter that uses a multiple slope transit time algorithm to provide accurate flow measurements. Figure 1 Principle of Transit-Time operation An ultrasonic beam of a given frequency is generated by applying a repetitive voltage pulse to the transducer crystals.

  • Page 5: User Interface

    Micronics U1000 User Manual 3 User interface Figure 2 illustrates the U1000 user interface comprising:-  One 2 line x 16 character LCD with backlight  Four tactile key switches  Two LED’s Figure 2 U1000 User Interface 3.1 Key switches >...

  • Page 6: Preparation

    45°with respect to the top of the pipe. The U1000 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.

  • Page 7: Attaching The U1000 To The Pipe

    U1000 User Manual 4.2 Attaching the U1000 to the pipe Follow the four steps shown in Figure 4 below to attach the U1000 to the pipe. The grease provided in the syringe is applied to the centre of the sensors as shown above.

  • Page 8: Adaptors For Small Pipes

    Micronics U1000 User Manual 4.3 Adaptors for small pipes Less than 40mm outside diameter 40 to 60mm outside diameter Greater than 60mm outside diameter Figure 5 Pipe Adaptors Guide rails for small pipes are supplied with adaptors. The diagrams above shows how these are fitted around the pipe.

  • Page 9: U1000 Interface Cable

    4.5 Connecting the U1000 to the Supply The U1000 will operate within the voltage range 12 - 24V ac/dc. Connect the external power supply to the Brown and Blue wires of the six core cable. For full compliance with EMC regulation a 12V supply is recommended for domestic and light industrial applications.

  • Page 10: Current Output (When Fitted)

    Powering up for the first time will initiate the sequence shown in Figure 7: Figure 7 Initial Power-on sequence 1. The Micronics startup screen is displayed for 5 seconds 2. The user enters the pipe ID (refer to section 5.1) 3.

  • Page 11: How To Enter The Pipe Id

    Micronics U1000 User Manual 5.1 How to enter the Pipe ID Figure 8 shows the Enter Pipe ID screen after an initial power up. Figure 8 Enter Pipe ID Screen (Metric) Initially, the hundreds unit (050.0) will blink. Press the key to increment the hundreds digit (050.0) in the sequence 0, 1.

  • Page 12: Pulse Output

    Micronics U1000 User Manual 5.2 Pulse output Pulse output can be set up to operate in two modes, namely volumetric and frequency. 5.2.1 Volumetric mode In Volumetric mode, each pulse output represents a measured volume of 10 litres (default value). In Volumetric mode, with the Vol per Pulse set to 1 and the pulse width set to 25ms, the maximum number of pulses that can be output (without storage) is 1/(0.025*2) = 20...

  • Page 13: Password Controlled Menus

    Micronics U1000 User Manual 7 Password Controlled Menus The password controlled menu allows the user some flexibility to change the default settings: User Password (71360):  Change the dimensions from mm to inches or vice-versa.  Change from Flow to Velocity Measurement ...

  • Page 14: Data Entry Menus

    Micronics U1000 User Manual 7.1.2 Data entry menus Menus containing a numeric value can be altered using the following procedure. For example, consider changing the Flow at maximum current from the default setting 1000 litres as indicated in Figure 10. to 1258 litres.
  • Page 15 Micronics U1000 User Manual 71360 MENU Sig: 87% Invalid &  OR No l/min 246.3 input for 10 seconds Enter Password: ERROR: ***** Invalid Password Setup Menu User Menu:  Setup Pulse Output Menu User Menu:  Pulse Output User Menu: Current Output Menu ...

  • Page 16: Setup Menu

    Micronics U1000 User Manual SETUP MENU Range 0.79 – 4.33 2.000 inches Select Dimensions: Inches &  mm | inches Invalid &  mm &  Invalid & Range 20 – 110mm Enter Pipe ID: Enter Pipe ID:  050.0 mm 050.0 mm...
  • Page 17 Micronics U1000 User Manual PULSE OUTPUT MENU Select Pulse: Off &  Range 1 – 200 ON | OFF Λ Test mode press V or generate a pulse On &  Valid &  Invalid &  Pulse Type: VOLUME | FREQ Freq &...

  • Page 18: Calibration Menu

    Micronics U1000 User Manual CURRENT OUTPUT MENU Select 4-20mA: ON | OFF ON &  Flow @ 20mA 1000.0 OFF &  Valid &  Flow @ 4mA 0000.0 Valid &  CALIBRATION MENU Damping Time [s]: Invalid & ...

  • Page 19: Diagnostics Menu

    Micronics U1000 User Manual 8 Diagnostics Menu The diagnostics menu provides some additional information about the flowmeter and its setup. The menu can be accessed by pressing the key from the main flow-reading screen. The menu shown below describes the various diagnostics items.

  • Page 20: Relocation Of Guide Rail

    Micronics U1000 User Manual 9 Relocation of guide rail If it is necessary to relocated the guide rail and sensor assembly use the following procedure 1. Remove complete assembly from the pipe 2. Insert a small screwdriver in the hole at the end of the guide rail moulding and lever up the clip holding the electronics assembly by pressing down on the screwdriver as shown below.

  • Page 21: Appendix I - U1000 Specification

    Micronics U1000 User Manual 10 Appendix I – U1000 Specification Table 1 lists the U1000 Product Specification. General Measuring Technique Transit time Measurement channels Timing Resolution ±50ps Turn down ratio 200:1 Flow velocity range 0.1 to 10m/s bidirectional Applicable Fluid types Clean water with <...

  • Page 22: Appendix Ii - Default Values

    Micronics U1000 User Manual Display 2 line x 16 characters Viewing angle Min 30°, Max 40° Active area 83mm (W) x 18.6mm(H) Keypad Format 4 key tactile feedback membrane keypad 11 Appendix II – Default values The settings will be configured at the factory for either metric or imperial units. Table 2 lists the metric default values.

  • Page 23: Appendix Iii - Error And Warning Messages

    Micronics U1000 User Manual 12 Appendix III – Error and Warning Messages 12.1 System errors There are three possible ‘System Error’ messages that can be displayed. These are: 1. Poor Signal. The unit is unable to detect a signal from one or both transducers. If this message persists the sensors will need to be relocated.
  • Page 24 Micronics U1000 User Manual 5. When programming the Zero Cut-off this is limited to the range 0.000 to 0.500. If an invalid value is entered then the following warning message is displayed. Range 0.00 – 0.500 0000.0 6. When programming the Calibration Factor this is limited to the range 0.5 to 1.5. If an invalid value is entered then the following warning message is displayed.

  • Page 25: Declaration Of Conformity

    Micronics U1000 User Manual Registered Office: Micronics Limited, Knaves Beech Business Centre, Davies Way, Loudwater, Buckinghamshire, HP10 9QR Web site www.micronicsflowmeters.com Tel: +44 (1628) 810456 Fax: +44 (1628) 531540 Issue 2.0 Page 25 Directors E.J. Farnon, M.A. Farnon Registration No. 1289680...

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