UNI-T UT231 Operating Manual
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UNI-T UT231 Operating Manual

Digital power clamp meter
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UT231
Operating Manual
Digital Power Clamp
Meter
P/N: 41451518

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Summary of Contents for UNI-T UT231

  • Page 1 UT231 Operating Manual Digital Power Clamp Meter P/N: 41451518...
  • Page 2 Model UT231 OPERATING MANUAL...

  • Page 3: Table Of Contents

    Model UT231: OPERATING MANUAL TABLE OF CONTENTS TITLE PAGE Overview Unpacking Inspection Safety Information Rules For Safe Operation International Electrical Symbols The Meter Structure A. The Meter Front Structure B. The Meter Back and Bottom Structure Functional Buttons Display Symbols Measurement Operation A.
  • Page 4 Model UT231: OPERATING MANUAL TABLE OF CONTENTS TITLE PAGE Three Phases Four Wires and Three Phases Three Wires Measurement Method Specifications A. General Specifications B. Environmental Requirements Accuracy Specifications A. AC Voltage B. Frequency C. AC Current D. Active Power E.

  • Page 5: Overview

    Meter. Point Contact Temperature Probe 1 piece USB Interface Cable 1 piece Model UT231 is a digital power clamp meter (hereafter Software 1 piece referred to as “the Meter”) is a handheld intelligent Tool Box 1 piece power meter which has both the features of digital 1.5V Battery (LR6)

  • Page 6: Safety Information

    Model UT231: OPERATING MANUAL Safety Information International electrical symbols used on the Meter and in this Operating Manual are explained on page 6. This Meter complies with the standards IEC61010: in pollution degree 2, overvoltage category (CAT. III 600V, Rules For Safe Operation CAT IV 300V) and double insulation.
  • Page 7 Model UT231: OPERATING MANUAL When measurement has been completed, indicator appears. With a low battery, the disconnect the connection between the test Meter might produce false readings that can leads and the circuit under test, remove the lead to electric shock and personal injury.

  • Page 8: International Electrical Symbols

    Model UT231: OPERATING MANUAL International Electrical Symbols The Meter Structure A. The Meter Face View (see figure 1) AC (Alternating Current) Grounding Double Insulated Warning. Refer to the Operating Manual Deficiency of Built-In Battery Danger of High Voltage Brack Conforms to Standards of European Union...
  • Page 9 Model UT231: OPERATING MANUAL Transformer Jaw: designed to pick up the AC Temperature negative Input Terminal and DC current flowing through the conductor. Temperature positive Input Terminal It could transfer current to voltage. The tested V: Voltage Input Terminal conductor must vertically go through the Jaw COM Input Terminal center.

  • Page 10: The Meter Back And Bottom Structure

    Model UT231: OPERATING MANUAL B.The Meter Back and Bottom Structure Functional Buttons (see figure 2) Below table indicated for information about the functional button operations. Button Operation Performed POWER Press and hold POWER for 1 second to turn the Meter on.
  • Page 11 Model UT231: OPERATING MANUAL Button Operation Performed Button Operation Performed MENU AC Voltage (main display) + Frequency interface on, USB appears and the Meter (secondary display) beeps. AC Current (main display) + AC Voltage Press USB again to turn the USB...
  • Page 12 Model UT231: OPERATING MANUAL Button Operation Performed Button Operation Performed shown on the left secondary display keep MAX/MIN at any mode except at the following ranges: SAVE on increasing. Press SAVE again to exit. Power factor (main display) + Phase...

  • Page 13: Display Symbols

    Model UT231: OPERATING MANUAL Display Symbols (see figure 3) Number Symbol Meaning Data hold is active Data Output is in progress Indicator for DC measurement Unit for hour Unit for minute Unit for second The battery is low. Warning: To avoid false...
  • Page 14 Model UT231: OPERATING MANUAL Number Symbol Meaning Number Symbol Meaning Minimum reading Indicator for data store Analogue Bar Graph Indicator for data stored is full Overloading Ruler Maximum reading TEMP Temperature symbol Calibration symbol Indicator for clear the stored reading...

  • Page 15: Measurement Operation

    Model UT231: OPERATING MANUAL Measurement Operation Circuit Press and hold POWER for one second to turn the Meter on. The default range is the last measurement range when you turned off the Meter. Replace the battery as soon as the battery indicator Brack “...
  • Page 16 Model UT231: OPERATING MANUAL The AC Voltage ranges are: Press MAX/MIN once, the LCD displays MAX, it 15V, 100V, 300V and 600V starts recording the maximum AC voltage True RMS value. The frequency range is: Press MAX/MIN again, the LCD displays MIN, it...

  • Page 17: Ac Current + Ac Voltage Measurement

    Model UT231: OPERATING MANUAL B. AC Current (main display) + AC Voltage The AC current ranges are: (secondary display) Measurement (see figure 5) 40A, 100A, 400A and 1000A The AC Voltage ranges are: 15V, 100V, 300V and 600V To measure AC current + AC voltage, connect the Meter...

  • Page 18: Active Power + Phase Angle Measurement

    Model UT231: OPERATING MANUAL starts recording the maximum AC current True RMS C. Active Power (main display) + Phase Angle value. (secondary display) Measurement (see figure 6) Press MAX/MIN again, the LCD displays MIN, it starts recording the minimum AC current True RMS value.
  • Page 19 Model UT231: OPERATING MANUAL The active power ranges are: The double display shows the active power kW 40A, 100A, 400A and 1000A value and the PG value of the measured object. The maximum active power kW measuring range The phase angle ranges are: is 600kW, OL will be displayed when it is over than 0°...

  • Page 20: Apparent Power + Reactive Power Measurement

    Model UT231: OPERATING MANUAL D. Apparent Power (main display) + Reactive Power Warning (secondary display) Measurement (see figure 7) To avoid damages to the Meter or harms to you, do you measure higher than AC voltage 600V rms and AC current 1000A rms.

  • Page 21: Power Factor + Phase Angle Measurement

    Model UT231: OPERATING MANUAL starts recording the maximum apparent power E. Power Factor (main display) + Phase Angle value. (secondary display) Measurement (see figure 8) Press MAX/MIN again, the LCD displays MIN, it starts recording the minimum apparent power value.
  • Page 22 Model UT231: OPERATING MANUAL factor. Warning Note To avoid damages to the Meter or harms to you, do you measure higher than AC voltage 600V rms and When testing has been completed, disconnect the AC current 1000A rms. connection between the testing leads and the circuit...

  • Page 23: Active Energy + Time Measurement

    Model UT231: OPERATING MANUAL F. Active Energy (main display) + Time (secondary Warning display) Measurement (see figure 9) To avoid damages to the Meter or harms to you, do you measure higher than AC voltage 600V rms and AC current 1000A rms.
  • Page 24 Model UT231: OPERATING MANUAL time are locked, but still continuous accumulate measuring time. After read the data, press HOLD again to continous measurement. kWh value continous accumulate and the measuring time jumps to the present measuring time. When the measuring time is over 24 hours or the Meter is switched to other measuring ranges, active energy measuring will stop.

  • Page 25: Temperature + Temperature Measurement

    Model UT231: OPERATING MANUAL G. Temperature (main display) and Temperature To test for temperature (main display) and Temperature (secondary display) Measurement (see figure (secondary display), connect the Meter as follows: Press the MENU to select Power factor (main display) + Phase angle (secondary display) range.

  • Page 26: True Rms Measurement And Average Value Measurement

    Model UT231: OPERATING MANUAL True RMS Measurement and Average Value Input Wave PK-PK 0-PK Measurement Sine 2.828 1.414 1.000 0.900 The True RMS measurement method can measure PK-PK accurately the effective value of non-sine wave input sine commute signal. (whole wave) 1.414...

  • Page 27: Three Phases Four Wires And Three Phases Three Wires Measurement Method

    V and COM input terminal of the power meter, clamp the transformer jaw to the third phase, its The Model UT231 digital power clamp meter can total watt is equal to the reading obtained times 1.732. measure single phase power and power factor. The...

  • Page 28: Specifications

    Model UT231: OPERATING MANUAL Specifications energy range. Analogue Bar Graph A. General Specifications Sampling: 3 times per second. Max. Jaw Size: 55mm diameter. Maximum Voltage between any Terminals and Power: 4 x 1.5V battery (LR6) grounding: Refer to different range input protection Dimensions: 303mm x 112mm x 39mm voltage.

  • Page 29: Accuracy Specifications

    Model UT231: OPERATING MANUAL Accurate Specifications Accuracy: (a% reading + b digits), guarantee for 1 year. Operating temperature: 23 Operating humidity: 45~75%R.H A. AC Voltage (True RMS) Range Resolution Accuracy Allowable Maximum overload protection Input Impedance voltage 100V 0.1V (1.2%+5)

  • Page 30: Ac Current

    Model UT231: OPERATING MANUAL C. AC Current (True RMS) Range Resolution Accuracy Allowable Maximum overload protection current 100A 0.1A (2%+5) 1000A RMS 400A 1000A D. Active Power (W=V x A x COS ) Voltage Range Voltage / Current 300V 600V 100V 12.00kW...

  • Page 31: Apparent Power

    Model UT231: OPERATING MANUAL E. Apparent Power (VA = V x A) Voltage Range Voltage / Current 100V 300V 600V 24.00kVA 4.00kVA 12.00kVA 0.60kVA Current 60.00kVA 100A 10.00kVA 30.00kVA 1.50kVA Range 40.00kVA 120.0kVA 240.0kVA 400A 6.00kVA 600.0kVA 1000A 100.0kVA 300.0kVA 15.00kVA...

  • Page 32: Reactive Power

    Model UT231: OPERATING MANUAL F. Reactive Power (Var = V x A x SIN ) Voltage Range Voltage / Current 100V 600V 300V 4.00kVar 24.00kVar 0.60kVar 12.00kVar Current 100A 10.00kVar 1.50kVar 30.00kVar 60.00kVar Range 40.00kVar 400A 6.00kVar 240.0kVar 120.0kVar 1000A 100.0kVar...

  • Page 33: Power Factor

    Model UT231: OPERATING MANUAL G. Power Factor (PF = W / VA) Range Accuracy Resolution Measuring Condition 0.3~1 The minimum measuring current 10A 0.022 0.001 (capacitive or inductive) The minimum measuring voltage 45V 0.3~1 Measuring current less than 10A OR...

  • Page 34: Active Energy

    Model UT231: OPERATING MANUAL I. Active Energy (kWh) Accuracy Resolution Range (3%+2) 0.001kWh 1~9999kWh Remarks: Allowable maximum overload protection voltage: 600V RMS Allowable maximum overload protection current: 1000A RMS K. Temperature (TEMP) Accuracy Resolution Range (1%+10) -50 ~0 (1%+5) 0 ~1300...

  • Page 35: Maintenance

    Model UT231: OPERATING MANUAL MAINTENANCE Do not use or store the Meter in a place of humidity, high temperature, explosive, inflammable and strong This section provides basic maintenance information magnetic field. including battery replacement instruction. Warning Do not attempt to repair or service your Meter unless...

  • Page 36: Replacing The Battery

    Model UT231: OPERATING MANUAL Replacing the Battery (see figure 11) Warning To avoid false readings, which could lead to possible electric shock or personal injury, replace the battery as soon as the battery indicator “ ” appears. Make sure the transformer jaw and the tests leads are disconected from the circuit being tested before opening the case bottom.
  • Page 37 Model UT231: OPERATING MANUAL *END* This operating manual is subject to change without notice.
  • Page 38 Model UT231: OPERATING MANUAL Copyright 2007 Uni-Trend Group Limited. All rights reserved. Manufacturer: Uni-Trend Technology (Dongguan) Limited Dong Fang Da Dao Bei Shan Dong Fang Industrial Development District Hu Men Town, Dongguan City Guang Dong Province China Postal Code: 523 925...

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