UNI-T UT50E Operating Manual
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UNI-T UT50E Operating Manual

UNI-T UT50E Operating Manual

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Model UT50E: OPERATING MANUAL
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Summary of Contents for UNI-T UT50E

  • Page 1: Table Of Contents

    Model UT50E: OPERATING MANUAL Table of Contents Page Title Overview Unpacking Inspection Safety Information Rules For Safe Operation International Electrical Symbols The multimeter Structure Functional Buttons Display Symbols Measurement Operation DC Voltage Measurement AC Voltage Measurement DC Current Measurement AC Current Measurement Measuring Resistance Measuring Diodes &...
  • Page 2 Model UT50E: OPERATING MANUAL Title Page Resistance Test Diodes and Continuity Test Frequency Temperature Capacitance Maintenance General Service Replacing the Battery Replacing the Fuses...

  • Page 3: Overview

    To avoid electric shock or personal injury, read the "Safety Information" and "Rules for Safe Operation" carefully before using the Meter. Digital Multimeters Model UT50E (hereafter referred to as “the Meter”) is a 4 1/2 digits with steady operations, fashionable structure and highly reliable hand-held measuring instrument having 30 measurement positions.

  • Page 4: Unpacking Inspection

    Model UT50E: OPERATING MANUAL Unpacking Inspection Open the package case and take out the multimeter. Check the following items carefully to see any missing or damaged part: Item Description 1 piece English Operating Manual 1 pair Test Lead 1 pair...

  • Page 5: Safety Information

    Model UT50E: 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 UT50E: 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. Donot use the Meter if it is damaged or the case (orpart of the case) is removed.
  • Page 7 Model UT50E: OPERATING MANUAL Rules For Safe Operation (2) l Disconnect circuit power and discharge all high- voltage capacitors before testing resistance, continuity, diodes, capacitance or current. l Before measuring current, check the Meter’s fuses and turn off power to the circuit before connecting the Meter to the circuit.

  • Page 8: International Electrical Symbols

    Model UT50E: OPERATING MANUAL International Electrical Symbols AC (Alternating Current). DC (Direct Current). AC or DC. Grounding. Double Insulated. Deficiency of Built-In Battery. Continuity Test. Diode. Fuse. Warning. Refer to the Operating Manual. Conforms to Standards of European Union.

  • Page 9: The Multimeter Structure

    Model UT50E: OPERATING MANUAL The multimeter Structure (see figure 1) ( figure 1) LCD Display Data Hold Button. Rotary Switch Power COM Input Terminal 20A Input Terminal mA Input Terminal C Input Terminal...

  • Page 10: Functional Buttons

    Model UT50E: OPERATING MANUAL Functional Buttons Below table indicated for information about the functional button operations Button Operation Performed POWER (Yellow Button) HOLD (Blue Button)

  • Page 11: Display Symbols

    Model UT50E: OPERATING MANUAL Display Symbols (see figure 2) 10-14 ( figure 2) Symbol Meaning Dangerous Voltages. The battery is low. 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.

  • Page 12: Display Symbols

    Model UT50E: OPERATING MANUAL Display Symbols (see figure 2) Symbol Meaning nF, F F: Farad. The unit of capacitance. F: Microfarad.1 x 10 or 0.000001 farads. nF: Nanofarad. 1 x 10 or 0.000000001 farads. The unit of frequency in cycles/ second.

  • Page 13: Measurement Operation

    Model UT50E: OPERATING MANUAL Measurement Operation(1) l Make sure the Sleep Mode is not on if you found there is no display on the LCD after turning on the Meter. l Make sure the Low Battery Display is not on, otherwise false readings may be provided.

  • Page 14: Ac Voltage Measurement

    Model UT50E: 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 15 Model UT50E: OPERATING MANUAL Measurement Operation(3) The AC voltage measurement has 4 measurement positions on the rotary switch: 2V, 20V, 200V and 750V To measure AC Voltage, connect the Meter as follows: Insert the red test lead into the V C terminal and the black test lead into the COM terminal.

  • Page 16: Dc Current Measurement

    Model UT50E: OPERATING MANUAL Measurement Operation(4) C. DC Current Measurement (see figure 4) black ( figure 4) 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.

  • Page 17: Ac Current Measurement

    Model UT50E: OPERATING MANUAL Measurement Operation(5) Note If the value of current to be measured is unknown, use the maximum measurement position (20A) and 20A terminal, and reduce the range step by step until a satisfactory reading is obtained. l When current measurement has been completed, disconnect the connection between the testing leads and the circuit under test.

  • Page 18: Measuring Resistance

    Model UT50E: OPERATING MANUAL Measurement Operation(6) Set the rotary switch to an appropriate measurement position in A range. Break the current path to be tested. Connect the red test lead to the more positive side of the break and the black test lead to the more negative side of the break.

  • Page 19: E. Measuring Resistance

    Model UT50E: OPERATING MANUAL Measurement Operation(7) 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. The resistance ranges has 7 measurement positions on the rotary switch: 200 , 2k , 20k , 200k , 2M ,...

  • Page 20: Measuring Diodes & Continuity

    Model UT50E: OPERATING MANUAL Measurement Operation(8) F. Measuring Diodes & Continuity (see 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 and continuity.
  • Page 21 Model UT50E: OPERATING MANUAL Measurement Operation(9) 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. The measured value shows on the display.

  • Page 22: Frequency Measurement

    Model UT50E: OPERATING MANUAL Measurement Operation(10) When continuity testing has been completed, disconnect the connection between the testing leads and the circuit under test. G. Frequency Measurement (see figure 7) black ( figure 7) Warning To avoid harm to you or damages to the Meter, do...

  • Page 23: Temperature Measurement

    Model UT50E: OPERATING MANUAL Measurement Operation(11) Note l When Hz measurement has been completed, disconnect the connection between the testing leads and the circuit under test. H. Temperature Measurement (see figure 8) black ( figure 8) Warning To avoid harm to you or damages to the Meter, do...

  • Page 24: Capacitance Measurement

    Model UT50E: OPERATING MANUAL Measurement Operation(12) Note l The Meter automatically displays the temperature value inside the Meter when there is no temperature probe connection. l The included temperature probe can only be measured up to 250. For any mesaurement higher than that, the rod type temperature probe must be used instead.
  • Page 25 Model UT50E: OPERATING MANUAL Measurement Operation(13) To measure capacitance, connect the Meter as follows: Insert the red test clip or red test lead into the V terminal and the black test clip or black test lead into the mA terminal.

  • Page 26: Sleep Mode

    Model UT50E: 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 10 minutes. At that time, the Meter consumes around 10 A current.

  • Page 27: General Specifications

    Model UT50E: OPERATING MANUAL General Specifications l Maximum voltage between Terminals and Grounding : DC 1000V or AC750V. Fused Protection for Input Terminal : 0.5A, 250V fast type, 5x20mm. Fused Protection for 20A Input Terminal : Un-fused. l Range : Manual ranging.

  • Page 28: Dc Voltage

    Model UT50E: OPERATING MANUAL...

  • Page 29: Accuracy Specifications

    Model UT50E: OPERATING MANUAL Accuracy Specifications(2) C. DC Current Range Resolution Accuracy Overload Protection 0.5A. 250V fast type 0.0001mA (0.5%+5) fuse, 5x20mm 20mA 0.001mA (0.8%+5) 200mA 0.01mA Un-Fused (2%+10) 0.001A Remarks: l At 20A Range: For continuous measurement 10 seconds and interval not less than 15 minutes.

  • Page 30: Resistance Test

    Model UT50E: OPERATING MANUAL Accuracy Specifications(3) E. Resistance Test Overload Accuracy Range Resolution Protection (0.5%+10) 0.01 0.0001k 0.001k 250V DC (0.3%+1) 0.01k or AC rms 200k 0.0001M (0.5%+12) 0.001M [5%(reading-1000)+10] 0.01M 200M Remarks: l At 200M range , test lead is in short circuit , and it is normal to display1000 digits.

  • Page 31: Temperature

    Model UT50E: OPERATING MANUAL Accuracy Specifications(4) H. Temperature Overload Range Accuracy Resolution Protection (3%+40) 250V AC (1%+30) C~400 C~1000 (2%+50) I. Capacitance Range Resolution Accuracy Overload Protection (3%+40) 0.0001nF 20nF 0.001nF 250V AC (4%+10) 0.0001 F 20 F 0.001 F...

  • Page 32: Maintenance

    Model UT50E: 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 33: Replacing The Fuses

    Model UT50E: OPERATING MANUAL Maintenance(2) Warning To avoid false readings, replace the battery as soon as the battery indicator appears. To replace battery: 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 34 Model UT50E: OPERATING MANUAL Maintenance(3) Rejoin the case bottom and the case top, and install the screw and rubber feet Replacement of fuses is seldom required. Burning of a fuse always results from the improper operation. ~ END ~ This operating manual is subject to change without notice.
  • Page 35 Model UT50E: OPERATING MANUAL...
  • Page 36 Model UT50E: 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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