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UNI-T UT2658 Operating Manual

Intelligent double clamp phase digital voltammeter
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P/N:110401103630X
DATE:2018.06.26
REV.2

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Summary of Contents for UNI-T UT2658

  • Page 1 P/N:110401103630X DATE:2018.06.26 REV.2...

  • Page 2: Table Of Contents

    Contents TITLE PAGE Warnings I. Introduction II. Electrical Symbols III. Technical Specifications 1.Reference and Operating Conditions 2. General Specifications 3. General Differences and Performance Indexes under Reference Conditions IV. Meter Description V. Operating Instructions 1. Power On/Off 2. Backlight Control...

  • Page 3: Title Page

    TITLE PAGE Warnings 3. Data Hold, Cancel and Save Thank you for purchasing our product UT265 intelligent double clamp 4. Data Access and Exit phase digital voltammeter (also known as automatic dual-clamp digital 5. Data Delete phase voltampere meter). In order to use the meter properly, please 6.

  • Page 5: Introduction

    correct wiring of kilowatt-hour meter and good conditions of wiring equipment, I. Introduction which all together turn the meter into a safe, accurate, convenient new model of instrument for electrical inspection. UT265 intelligent double clamp phase digital voltammeter (also known as The meter, designed with molded housing made in latest materials and anti- Automatic dual-clamp digital phase voltampere meter) comes out from vibration, anti-skidding, high-insulation protection jacket, can offer 240dots...

  • Page 6: Electrical Symbols

    factories and mining, R&D institutes, metrological department. It is particularly Alternating Current(AC) needed in electric charging and relay protection system, electric power Direct Current(DC) calculation, check and monitoring from power supply remarketing departments Dual Insulation as well as electric installment, relay protection, differential inspection, start-up testing, power transformation check , electrical training, skill competition performed by technical department.

  • Page 7: General Specifications

    2. General Specifications Current Amplitude when ---- measuring frequency 200mA 3mA 10mA 20A To measure two-way AC voltage, current, phase phase sequence angle between voltages, current or both, frequency, Voltage Amplitude when phase sequence, active, reactive and apparent ---- measuring frequency 100V 5V 10V 600V powers, power factor;...
  • Page 8 Phase Angle: 0.0 360.0 Power Factor: 0.001 Frequency: 45.00Hz 65.00Hz Data Storage 1500 sets With RS232,all data transferred into PC for Active Power: 0.0W 12kW RS232 Interface further data management and analysis Reactive Power: 0.0VAR 12kVAR Apparent Power: 0.0VA 12kVA Rs232 type, 1.8 meters long Communication line Power Factor: -1 +1...
  • Page 9 Auto power off to reduce power loss 15mins meter circuits and housing, able to withstand AC Auto Power Off later after power on Withstand Voltage voltage1000V/50Hz for 1 minutes when input Low battery displays with voltage lower than sine wave Battery Voltage 7.2V, please change batteries For circuits and protected housing...

  • Page 10: General Differences And Performance Indexes Under Reference Conditions

    3 General Differences and Performance Indexes under Reference IV. Structure of Meter Conditions Range Items Resolution General Difference 1. RS232 Interface Voltage (1.5%rdg+3dgt) AC 0.00V 600V 0.01V 2. Vibration-Proof Insulation (1.5%rdg+3dgt) Current AC 0.0mA 20.0A 0.1mA Jacket Phase Angle 3. LCD Display 4.

  • Page 11: Operating Instructions

    V. Operating Instructions 3. Data Hold, Cancel and Save Under measuring status, press HOLD button to keep displayed data, indicated by HD icon, and repress to cancel the operation. The meter Notes: will automatically save and number current data when holding data, Please carefully check to ensure there are no damaged parts before indicated by group serial number such as S 001.

  • Page 12: Data Transmission To Pc

    mode. Danger! Do not measure current above 20A, otherwise it may 6. Data Transmission to PC damage the meter! The accessory USB-RS232 connection line is used for communication of Connect wires as specified in the manual and avoid wrong inserts the meter with PC.
  • Page 13 The meter can measure two-way AC voltage, current, phase angle between voltages, currents or both, frequency, phase sequence, active, reactive and apparent powers, power factor, inductive and capacitive circuits. Wire connection shows as below: Single-Phase Measurement: Connect measured voltage lines L and N to terminals red U1 and black COM, then get current clamp I1 enclose L line.
  • Page 14 Three-Phase Four-Wire Measurement: It takes two steps to measure three- phase four-wire voltage, current, phase angle, phase sequence, frequency, power factor, ect. Refer to the table and figure for right connection.( it is internally short-circuit for 2 COM terminals and so any COM can be selected for connection with N line.) Step 1 Step 2...
  • Page 15 Three-Phase Three-Wire Measurement: Connect measured voltage lines Measuring Measuring yellow UA, green UB and red UC to terminals red U1, black COM and U2, Tank Tank then get current clamps I1 and I2 enclose measured lines IA and IC. It is able to measure three-phase three-wire voltage, current, phase angle and sequence, frequency, power and power factor, ect.
  • Page 16 It is possible to differentiate among inductive and capacitive load, phase sequence and the polarity during measuring. If U1I1 phase angle is displayed Measuring Tank ranging from 0 90 , it measured load will be diagnosed as inductive; it is capacitive load with scope from 270 360 ;...

  • Page 17: Battery Replacement

    VI. Battery Replacement 6. Press ON button to check if the battery is successfully replaced, if not, repeat operations from the second step. Notes: 7. Take the battery out if the mete is not in use for long time. To avoid damage to the meter, ensure correct polarity when installing batteries.

  • Page 18: Other Items And Notes

    VII. Other Items and Notes 4. Three-Phase Four-Wire (phase angle under three-phase load balance) Phase Relations Phase Value Phase Relations Phase Value 1. Exclusiveness of Current Clamps Ua-Ub Ia-Ib There are two current clamps attached to every meter, which can not be Ub-Uc Ib-Ic exchanged for the other meters.

  • Page 19: Product Contents

    6 Three-Phase Four-Wire and Three-Phase Three-Wire Vector Diagrams VIII. Product Contents The Meter Carrying Case Current Clamps System Software CD 1 (1.8 meters) RS232 Communication Line Test Leads 4PCS red 2 black 2 Battery 6 PCS Alkaline Dry Battery 1.5V AA Three-Phase Four-Wire Three-Phase Three-Wire Vector Diagram...

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