UNI-T UT58D Operating Manual
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UNI-T UT58D Operating Manual

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Model UT58D: OPERATING MANUAL
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Summary of Contents for UNI-T UT58D

  • Page 1: Table Of Contents

    Model UT58D: OPERATING MANUAL Table of Contents Title Page Overview Unpacking Inspection Safety Information Rules For Safe Operation International Electrical Symbols The Meter Structure Rotary Switch Functional Buttons Display Symbols Measurement Operation A. DC and AC Voltage Measurement B. DC and AC Current Measurement C.

  • Page 2: Title Page

    Model UT58D: OPERATING MANUAL Title Page Maintenance A. General Services B. Replacing the Fuses C. 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. Digital Multimeters Model UT58D (hereafter referred to as “the Meter”) is 3 1/2 digits with ex-large LCD, steady operations, fashionable structure and highly reliable hand-held measuring instrument.

  • Page 4: Unpacking Inspection

    Model UT58D: 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 English Operating Manual 1 piece Test Lead 1 pair Multi-Purpose Socket...

  • Page 5: Safety Information

    Model UT58D: OPERATING MANUAL Safety Information This Meter complies with the standards IEC61010: in pollution degree 2, overvoltage category (CAT. II 1000V, CAT. III 600V) and double insulation. CAT. II: Local level, appliance, PORTABLE EQUIPMENT etc., with smaller transient voltage overvoltages than CAT.

  • Page 6: Rules For Safe Operation

    Model UT58D: OPERATING MANUAL Rules For Safe Operation (1) 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: l Before using the Meter inspect the case. Do not use the Meter if it is damaged or the case (or part of the case) is removed.
  • Page 7 Model UT58D: OPERATING MANUAL Rules For Safe Operation (2) l When using the test leads, keep your fingers behind the finger guards. l Disconnect circuit power and discharge all high -voltage capacitors before testing resistance, continuity, diodes, capacitance or current.

  • Page 8: International Electrical Symbols

    Model UT58D: OPERATING MANUAL International Electrical Symbols AC (Alternating Current). DC (Direct Current). Grounding. Double Insulated. Deficiency of Built-In Battery. Warning. Refer to the Operating Manual. Diode. AC or DC. Fuse. Continuity Test. Conforms to Standards of European Union.

  • Page 9: The Meter Structure

    Model UT58D: OPERATING MANUAL The Meter Structure (see figure 1) ( figure 1) 1 LCD Display 2 POWER 3 HOLD Button. 4 Rotary Switch 5 COM Input Terminal 6 20A Input Terminal 7 mA Input Terminal 8 Other Input Terminal.

  • Page 10: Rotary Switch

    Model UT58D: OPERATING MANUAL Rotary Switch Below table indicated for information about the rotary switch positions. DC voltage measurement. AC voltage measurement. Transistor Test AC Current Measurement DC Current Measurement Capacitance Test Inductance Test Diode test Continuity test Resistance measurement.

  • Page 11: Functional Buttons

    Model UT58D: OPERATING MANUAL Functional Buttons Below table indicated for information about the functional button operations POWER Turn the Meter on and off. ( Ye l l o w l Press down the POWER to turn on the B u t t o n ) Meter.

  • Page 12: Display Symbols

    Model UT58D: OPERATING MANUAL Display Symbols(1) (see figure 2) ( figure 2) Symbol Meaning The battery is low. Warning: To avoid false readings, replace the battery as soon as the battery indicator appears. Warning Symbol. Indicator for AC voltage or current.
  • Page 13 Model UT58D: OPERATING MANUAL Symbol Meaning The Unit of Transistor Test A: Amperes (amps). The unit of mA, A current. mA: Milliamp. 1 x 10 or 0.001 amperes. Volts. The unit of voltage. mV: Millivolt. 1 x 10 or 0.001 volts.

  • Page 14: Measurement Operation

    Model UT58D: OPERATING MANUAL Measurement Operation(1) Black ( figure 3) The DC Voltage ranges are: 200mV, 20V, 200V and 1000V. The AC Voltage ranges are: 2V, 200V and 1000V To measure DC Voltage, connect the Meter as follows: Insert the red test lead into theV input terminal and the black test lead into the COM input terminal.

  • Page 15: Dc And Ac Current Measurement

    Model UT58D: OPERATING MANUAL Measurement Operation(2) Note l If the value of voltage to be measured is unknown, use the maximum measurement position (1000V) and reduce the range step by step until a satisfactory reading is obtained. l The LCD displays “1” indicating the existing selected range is overloaded, it is required to select a higher range in order to obtain a correct reading.
  • Page 16 Model UT58D: OPERATING MANUAL Measurement Operation(3) Warning Never attempt an in-circuit current measurement where the open circuit voltage between terminals and ground is greater than 60V DC or 30V rms. If the fuse burns out during measurement, the Meter may be damaged or the operator himself may be hurt.

  • Page 17: Measuring Resistance

    Model UT58D: OPERATING MANUAL Measurement Operation(4) Note l If the value of current to be measured is unknown, use the maximum measurement position, and reduce the range step by step until a satisfactory reading is obtained. l For safety sake, the measuring time for high current...
  • Page 18 Model UT58D: OPERATING MANUAL Measurement Operation(5) 1. Insert the red test lead into the V input terminal and the black test lead into the COM terminal. 2. Set the rotary switch to an appropriate measurement position in range. 3. Connect the test leads parallel across with the object being measured.

  • Page 19: Measuring Diodes And Continuity

    Model UT58D: OPERATING MANUAL Measurement Operation(6) D. Measuring Diodes and Continuity (see figure 6) Black Red ( figure 6) Warning To avoid damage to the Meter or to the equipment under test, disconnect circuit power and discharge all high-voltage capacitors before measuring diodes.
  • Page 20 Model UT58D: OPERATING MANUAL Measurement Operation(7) 2. Set the rotary switch to 3. For forward voltage drop readings on any semiconductor component, place the red test lead on the component’s anode and place the black test lead on the component’s cathode.

  • Page 21: Testing For Lnductance

    Model UT58D: OPERATING MANUAL Measurement Operation(8) Note l When continuity testing has been completed, disconnect the connection between the testing leads and the circuit under test, and remove the testing leads away from the input terminal of the Meter. E. Testing for Inductance...

  • Page 22: Capacitance Measurement

    Model UT58D: OPERATING MANUAL Measurement Operation(9) F. Capacitance Measurement (see figure 8) ( figure 8) Warning To avoid damage to the Meter or to the equipment under test, disconnect circuit power and discharge all high-voltage capacitors before measuring capacitance.Use the DC voltage function to confirm that the capacitor is discharged.
  • Page 23 Model UT58D: OPERATING MANUAL Measurement Operation(10) To measure capacitance, connect the Meter as follows: 1. According to the size of the tested object’s leads, select multi-purpose socket or test clip to insert into the mA and V terminal. 2. Set the rotary switch to an appropriate measurement position in Fcx range.

  • Page 24: Measuring Transistor

    Model UT58D: OPERATING MANUAL Measurement Operation(11) ( figure 9)

  • Page 25: Sleep Mode

    Model UT58D: OPERATING MANUAL Sleep Mode To preserve battery life, the Meter automatically turns off if you do not turn the rotary switch or press any button for around 15 minutes. When the Meter is under sleep mode, it consumes 10 A current.

  • Page 27: Dc Voltage

    Model UT58D: OPERATING MANUAL...

  • Page 28: Ac Current

    Model UT58D: OPERATING MANUAL...

  • Page 29: Accuracy Specifications

    Model UT58D: OPERATING MANUAL Accuracy Specifications(3) Remarks: l The tested inductance: Q 10, Internal resistance 1.3k. l When the tested inductance is >1H, the obtained reading is only for reference.

  • Page 30: Capacitance

    Model UT58D: OPERATING MANUAL...

  • Page 31: Maintenance

    Model UT58D: OPERATING MANUAL Maintenance(1) This section provides basic maintenance information including battery and fuse 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 32 Model UT58D: OPERATING MANUAL Maintenance(2)
  • Page 33 Model UT58D: OPERATING MANUAL Maintenance(3) 4. Remove the battery from the battery connector. 5. Replace with a new 9V battery (NEDA1604, 6F22 or 006P). 6. Rejoin the case bottom and case top, and reinstall the 3 screws and the holster.
  • Page 34 Model UT58D: OPERATING MANUAL Copyright 2001 Uni-Trend International Limited. All rights reserved. Manufacturer: UNI-TREND TECHNOLOGY(DONG GUAN)LIMITED Address: Dong Fang Da Dao, Bei Shan Dong Fang Industrial Development District, Hu Men Town, Dong Guan City, Guang Dong Province, China Headquarters: Uni-Trend International Limited...

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