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UNI-T UT212 Operating Manual

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Model UT212: OPERATING MANUAL

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Summary of Contents for UNI-T UT212

  • Page 1: Table Of Contents

    Model UT212: OPERATING MANUAL Table of Contents Title Page Overview Unpacking Inspection Safety Information Rules For Safe Operation International Electrical Symbols The Meter Structure Functional Buttons Display Symbols Measurement Operation A. DC & AC Voltage Measurement B. AC Current Measurement C.
  • Page 2 Model UT212: OPERATING MANUAL Title Page B. AC Voltage C. AC Current D. Resistance Maintenance A. General Service B. Replacing the Battery...

  • Page 3: Overview

    To avoid electric shock or personal injury, read the “Safety Information” and “Rules for Safety Operation” carefully before using the Meter. The Model UT212 (hereafter referred to as “the Meter”) are a 3999 counts 3 3/4 digits auto clamp multimeter, they auto sense on AC & DC voltage, AC current and resistance measurement.

  • Page 4: Unpacking Inspection

    Model UT212: OPERATING MANUAL Unpacking Inspection Open the package case and take out the Meter. Check the following items carefully to see any missing or damaged part: Item Description Operating Manual 1 piece 1 pair Test Lead 9V Battery (NEDA 1604, 6F22 or 0006P)

  • Page 5: Safety Information

    CAT. IV. Under the influence of Radiated, Radio-Frequency Electromagnetic Field phenomenon, the UT212 may malfunction and can self-recover after the test. Use the Meter only as specified in this operating manual, otherwise the protection provided by the Meter may be impaired.
  • Page 6 Model UT212: OPERATING MANUAL A Note identifies the information that user should pay attention on. International electrical symbols used on the Meter and in this Operating Manual are explained on page 9.

  • Page 7: Rules For Safe Operation

    Model UT212: OPERATING MANUAL Rules For Safe Operation Warning To avoid possible electric shock or personal injury, and to avoid possible damage to the Meter or to the equipment under test, adhere to the following rules: Check for the lever is in good condition when measuring AC current.
  • Page 8 Model UT212: OPERATING MANUAL Disconnect circuit power and discharge all high-voltage capacitors before testing resistance. Replace the battery as soon as the battery indicator appears or no display when turning on the Meter. With a low battery, the Meter might produce false readings that can lead to electric shock and personal injury.

  • Page 9: International Electrical Symbols

    Model UT212: OPERATING MANUAL Do not use or store the Meter in an environment of high temperature, humidity, explosive, inflammable and strong magnetic field. The performance of the Meter may deteriorate after dampened. International Electrical Symbols Deficiency of Built-In Battery...

  • Page 10: The Meter Structure

    Model UT212: OPERATING MANUAL The Meter Structure (see figure 1) 1. Transformer Jaws designed to pick up the AC current flowing through the conductor. 2. LCD Display. 3. Function Buttons 4. Input Terminals Functional Buttons Below table indicated for information about the functional (figure 1) button operations.

  • Page 11: Display Symbols

    Model UT212: OPERATING MANUAL Display Symbols (see figure 2) (figure 2) Number Symbol Meaning Auto power off is on Standby indicator STANDBY --- The number of records are saved No. XX Indicator for saving record. SAVE Indicator for negative reading “...
  • Page 12 Model UT212: OPERATING MANUAL Number Symbol Meaning Indicator for AC Voltage. Indicator for DC Voltage Indicator for overloading Ohm. The unit of resistance. ,k ,M kilohm. 1 x 10 or 1000 ohms. Megaohm. 1 x 10 or 1,000,000 ohms. Volts. The unit of voltage.

  • Page 13: Measurement Operation

    Model UT212: OPERATING MANUAL Measurement Operation The LCD displays full icon while turning on the Meter, then the Meter will carry out self-check process, it will take around 2 seconds, after that, the Meter will enter stand by mode and display “STANDBY-----“.
  • Page 14 Model UT212: OPERATING MANUAL Full auto measurement mode To measure DC and AC voltage, connect the Meter as follows: 1. Insert the red test lead into the V terminal and the black test lead into the COM terminal 2. Connect the test leads across with the object being measured. When the AC voltage is higher than AC1.5V or DC voltage is higher than ±1V, the Meter will...
  • Page 15 Model UT212: OPERATING MANUAL Note: When DC and AC voltage measurement has been completed, disconnect the connection between the testing leads and the circuit under test, and remove the testing leads away from the input terminals of the Meter.

  • Page 16: Ac Current Measurement

    Model UT212: OPERATING MANUAL B. AC Current Measurement (See figure 4) To measure current, do the following: correct incorrect 1. Check the lever is in good condition. 2. Press the lever to open the transformer jaws. 3. Center the conductor within the transformer jaw like figure 5.

  • Page 17: Measuring Resistance

    Model UT212: OPERATING MANUAL C. Measuring Resistance (see figure 5) Warning To avoid damages to the Meter or to the devices under test, disconnect circuit power and discharge all the high-voltage capacitors before measuring resistance. black When the Meter working at an effective voltage over 60V in DC or 30V in AC, special care should be taken for there is danger of electric shock.
  • Page 18 Model UT212: OPERATING MANUAL Note The test leads can add 0.1 to 0.2 of error to resistance measurement. To obtain precision readings in low-resistance measurement, it is necessary to subtract the value measured when the testing leads are short circuited from the reading.

  • Page 19: Using Save, Read & Clear Features

    Model UT212: OPERATING MANUAL D. Using Save, Read and Clear Features 1. Under any measurement mode, press SAVE button to enter save mode. The LCD displays “SAVE No.” to indicate saving record is in process and the index number (number of records saved).

  • Page 20: Sleep Mode

    Model UT212: OPERATING MANUAL E. Sleep Mode 1. Under the standby mode, to preserve battery life, the Meter automatically enters into sleep mode you do not press any button or carrying out measurement for around 10 minutes. The Meter display 2.
  • Page 21 Model UT212: OPERATING MANUAL Range: Auto Polarity Display: Auto Measurement Speed: Updates 2-3 times/second. Below 1V/m electrostatic discharge: Accuracy = specified accuracy + 5% of the range. Over 1V/m electrostatic discharge: Without specified accuracy. Temperature: Operating: 0 to +40 (32 to +104 ).

  • Page 22: Accuracy Specifications

    Model UT212: OPERATING MANUAL Accuracy Specifications Accuracy: ( a% reading + b digits) , guarantee for 1 year. Operating temperature: 23 Relative humidity: 75%. A. DC Voltage Range Resolution Accuracy Overload Remarks Protection Input impedance: Full auto measurement mode: 10mV (0.8%+1)

  • Page 23: Ac Voltage

    Model UT212: OPERATING MANUAL B. AC Voltage Range Resolution Accuracy Overload Remarks Protection Input impedance: Full auto measurement mode: When Vx 5V, it is around 10mV (1.2%+5) 10M . > 400V 100mV When Vx 5V, it instantly transits from 1k to 10M .

  • Page 24: Ac Current

    Model UT212: OPERATING MANUAL C. AC Current Range Resolution Accuracy Remarks 0.4A input current Frequency response 20A: (3.0%+8) 50Hz~60Hz. 10mA Display effective value of >20A: (2.0%+8) sine wave (mean value 200A: (1.5%+5) response). 400A 100mA Testing sensitivity: AC0.4A >200A: (1.5%+50)

  • Page 25: Resistance

    Model UT212: OPERATING MANUAL D. Resistance Range Resolution Accuracy Overload Protection (1.2%+2) + test lead short circuit resistance value 600Vp (1.0%+2) 400k (1.2%+2) (1.5%+2)

  • Page 26: Maintenance

    Model UT212: OPERATING MANUAL Maintenance This section provides basic maintenance information including battery replacement instruction. Warning Do not attempt to repair or service your Meter unless you are qualified to do so and have the relevant calibration, performance test, and service information.

  • Page 27: Replacing The Battery

    Model UT212: OPERATING MANUAL B. Replacing the Battery (See t) Warning screw To avoid false readings, which could lead to possible electric shock or personal injury, replace the battery as battery soon as the battery indicator “ ” appears or no display when turning on the Meter.
  • Page 28 Model UT212: OPERATING MANUAL To replace the battery: 1. Turn the meter power off and remove all the connections from the terminals. 2. Remove the screw from the battery compartment, and separate the battery compartment from the case bottom. 3. Remove the battery from the battery compartment.
  • Page 29 Model UT212: OPERATING MANUAL...
  • Page 30 Model UT212: OPERATING MANUAL Copyright 2005 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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