UNI-T UT61A Operating Manual
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UNI-T UT61A Operating Manual

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Model UT61A/61B/61C/61D/61E: OPERATING MANUAL

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G.Frequency Measurement
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  • Page 1: Table Of Contents

    Model UT61A/61B/61C/61D/61E: 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/AC Voltage Measurement B.DC/AC Current Measurement C.Measuring Resistance D.Testing for Continuity...

  • Page 2: Title Page

    Model UT61A/61B/61C/61D/61E: OPERATING MANUAL Title Page I.Transistor hFE Measurement J.EF Function Operation of Hold Mode RANGE Button MAX MIN Button PEAK Button Data Outputting The Use of Relative Value Mode The BLUE Button Turning on the Display Backlight Sleep Mode...
  • Page 3 Model UT61A/61B/61C/61D/61E: OPERATING MANUAL Title Page F.Capacitance G.Frequency H.Diode Test I.Continuity Test J.Temperature K.Transistor hFE Maintenance A.General Service B.Replacing the Battery C.Replacing the Fuses USB and RS232C Serial Port...

  • Page 4: Overview

    Model UT61A/61B/61C/61D/61E: OPERATING MANUAL This Operating Manual covers information on safety and cautions. Please read the relevant information carefully and observe all the Warnings and Notes strictly. Warning...

  • Page 5: Unpacking Inspection

    9V Battery (NEDA1604, 6F22 or 0006P) (installed inside the Meter) 1 piece RS232C Interface Cable(except UT61A) 1 piece USB Interface Cable (Optional at extra cost) (except UT61A) Installation Guide & Computer Interface Software (CD-ROM) (Come 1 piece along with the RS232C or USB Interface Cable) (except UT61A)

  • Page 6: Safety Information

    Model UT61A/61B/61C/61D/61E: OPERATING MANUAL In the event you find any missing or damage, please contact your dealer immediately. Safety Information This Meter complies with the standards IEC61010: in pollution degree 2, overvoltage category (CAT. III 1000V, CAT. IV 600V) and double insulation.

  • Page 7: Rules For Safe Operation

    Model UT61A/61B/61C/61D/61E: 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: 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 8 Model UT61A/61B/61C/61D/61E: OPERATING MANUAL l 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. l When using the test leads, keep your fingers behind the finger guards.

  • Page 9: International Electrical Symbols

    Model UT61A/61B/61C/61D/61E: OPERATING MANUAL l Turn the Meter off when it is not in use and take out the battery when not using for a long time. l Constantly check the battery as it may leak when it has been using for some time, replace the battery as soon as leaking appears.

  • Page 10: The Meter Structure

    Model UT61A/61B/61C/61D/61E: OPERATING MANUAL The Meter Structure (see figure 1) LCD Display Functional Buttons Blue button Rotary Switch Input Terminal: figure 1...

  • Page 11: Rotary Switch

    Model UT61A/61B/61C/61D/61E: OPERATING MANUAL Rotary Switch Below table indicated for information about the rotary switch positions. AC and DC Voltage Measurement AC Voltage Measurement (UT61D only) DC Voltage Measurement (UT61D only) Resistance Measurement Diode Test Continuity Test Capacitance Test Frequency and Duty Cycle Test...

  • Page 12: Functional Buttons

    Model UT61A/61B/61C/61D/61E: OPERATING MANUAL Functional Buttons Below table indicated for information about the functional button operations. Button Operation Performed Press and hold for 2 serconds to turn the display backlight on or off. Press to enter or exit data hold mode.

  • Page 13: Display Symbols

    Model UT61A/61B/61C/61D/61E: OPERATING MANUAL Display Symbols Symbol Meaning Data hold is active. Sleep Mode indicator Indicates negative reading. Indicator for AC measurement Indicator for DC measurement The Meter is in the auto range mode in which the Meter automatically selects the range with the best resolution.
  • Page 14 Model UT61A/61B/61C/61D/61E: OPERATING MANUAL Symbol Meaning The REL is on to display the stored value minus the present value. : Ohm. The unit of resistance. k : kilohm. 1 x 10 or 1000 ohms. M : Megaohm. 1 x 10 or 1,000,000 ohms.

  • Page 15: Measurement Operation

    Model UT61A/61B/61C/61D/61E: OPERATING MANUAL Measurement Operation A. DC/AC Voltage Measurement (See figure 2) figure 2...
  • Page 16 DC and AC measurement mode. 3. Connect the test leads across with the object being measured. The measured value shows on the display. UT61A, UT61B and UT61C: display effective value of sine wave (mean value response). UT61D and UT61E: display true rms value.
  • Page 17 If the circuit impedance is less than or equal to 10k , the error is negligible (0.1% or less). l For UT61A and UT61B:When measuring mV, you must press RANGE manually to enter mV range.

  • Page 18: B.dc/Ac Current Measurement

    Model UT61A/61B/61C/61D/61E: OPERATING MANUAL B. DC/AC Current Measurement (See figure 3) figure 3...
  • Page 19 Model UT61A/61B/61C/61D/61E: OPERATING MANUAL Warning Before connecting the Meter to the return circuit to be tested, cut off the current of the return circuit. If the fuse burns out during measurement, the Meter may be damaged or the operator himself may be hurt.
  • Page 20 Model UT61A/61B/61C/61D/61E: OPERATING MANUAL UT61A, UT61B and UT61C: display effective value of sine wave (mean value response). UT61D and UT61E: display true rms value. 5. Press Hz% to obtain the frequency and duty cycle value. Input Amplitude: (DC electric level is zero)

  • Page 21: C.measuring Resistance

    Model UT61A/61B/61C/61D/61E: OPERATING MANUAL C. Measuring Resistance (See figure 4) figure 4...
  • Page 22 Model UT61A/61B/61C/61D/61E: OPERATING MANUAL 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. To avoid harm to yourself, do not input higher than DC 60V or AC 30V voltages.
  • Page 23 Model UT61A/61B/61C/61D/61E: OPERATING MANUAL...

  • Page 24: D.testing For Continuity

    Model UT61A/61B/61C/61D/61E: OPERATING MANUAL D. Testing for Continuity (See figure 5) figure 5...
  • Page 25 The buzzer does not sound if the resistor to be tested is >35 Note l UT61A, UT61B, UT61C and UT61D: open circuit voltage is around 0.45V UT61E: open circuit voltage is around -1.2V l When continuity testing has been completed, disconnect the connection...

  • Page 26: E.testing Diodes

    Model UT61A/61B/61C/61D/61E: OPERATING MANUAL E. Testing Diodes (See figure 6) figure 6...
  • Page 27 Model UT61A/61B/61C/61D/61E: OPERATING MANUAL...
  • Page 28 Model UT61A/61B/61C/61D/61E: OPERATING MANUAL l Connect the test leads to the proper terminals as said above to avoid error display. The LCD will display OL indicating diode being tested is open or polarity is reversed. The unit of diode is Volt (V), displaying the forward voltage drop readings.

  • Page 29: F.capacitance Measurement

    Model UT61A/61B/61C/61D/61E: OPERATING MANUAL F. Capacitance Measurement (See figure 7) figure 7...
  • Page 30 REL mode can help on that. UT61A, UT61B, UT61C, UT61D and UT61E: around 10nF UT61E: around 50PF l For more convenience, use the included multi-purpose socket for measuring capacitor with leads or SMT capacitor.
  • Page 31 Model UT61A/61B/61C/61D/61E: OPERATING MANUAL n the tested capacitor is more than 100uF figure 8...
  • Page 32 Model UT61A/61B/61C/61D/61E: OPERATING MANUAL 40MHz:unspecified For UT61E:Measuring Audio frequency,if the input voltage is more than 15 volt. the meter will simulate the sound in same frequency.

  • Page 33: H.temperature Measurement

    Model UT61A/61B/61C/61D/61E: OPERATING MANUAL l When frequency 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. H. Temperature Measurement (UT61B and UT61C only) (See figure 9)
  • Page 34 Model UT61A/61B/61C/61D/61E: OPERATING MANUAL Warning To avoid harm to yourself, do not input higher than DC 60V or AC 30V voltages. To measure temperature, connect the Meter as follows: 1. Set the rotary switch to 2. Insert the temperature probe into the input terminal as shown on the figure 9.

  • Page 35: I.transistor Hfe Measurement

    Model UT61A/61B/61C/61D/61E: OPERATING MANUAL I. Transistor hFE Measurement (UT61A only) (See figure 10) figure 10...
  • Page 36 Model UT61A/61B/61C/61D/61E: OPERATING MANUAL 1. Set the rotary switch to hFE. 2. Insert the multi-purpose socket into the input terminal as shown on figure 10. 3. Insert the transistor to be tested into the corresponding multi-purpose socket jacks. 4. The LCD display hFE nearest value...

  • Page 37: J.ef Function

    Model UT61A/61B/61C/61D/61E: OPERATING MANUAL J. EF Function (UT61A only) (See figure 11) figure 11...

  • Page 38: Operation Of Hold Mode

    Model UT61A/61B/61C/61D/61E: OPERATING MANUAL To use EF function, connect the Meter as follows: 1. Set the rotary switch to EF and remove the test lead from the input terminals. 2. Place the housing front part with marking towards the object being measured.

  • Page 39: Range Button

    Press and hold RANGE for over 2 seconds to return to autoranging; the Meter beeps. MAX MIN button (UT61A, UT61B, UT61C and UT61D only) l Press MAX MIN to start recording of maximum and minimum values. Steps the display through high (MAX) and low (MIN) readings. The Meter enters manual ranging mode after pressing MAX MIN button.

  • Page 40: Data Outputting

    Model UT61A/61B/61C/61D/61E: OPERATING MANUAL For UT61E,Auto entering Data outputting mode.
  • Page 41 Model UT61A/61B/61C/61D/61E: OPERATING MANUAL...

  • Page 42: General Specifications

    Fused Protection for AmA Input Terminal:1A H 240V 6x25mm. Fused Protection for 10A Input Terminal:10A H 240V 6x25mm. l Display UT61A and UT61B:Maximum reading 4000 (frequency 9999), analogue bar graph 41 segments UT61C and UT61D:Maximum reading 6000 (frequency 9999), analogue bar graph 61 segments.
  • Page 43 Model UT61A/61B/61C/61D/61E: OPERATING MANUAL...
  • Page 44 Model UT61A/61B/61C/61D/61E: OPERATING MANUAL...
  • Page 45 Model UT61A/61B/61C/61D/61E: OPERATING MANUAL (0.8%+3)
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  • Page 58 Model UT61A/61B/61C/61D/61E: OPERATING MANUAL...
  • Page 59 Model UT61A/61B/61C/61D/61E: OPERATING MANUAL 0.01Hz 0.001Hz...
  • Page 60 Model UT61A/61B/61C/61D/61E: OPERATING MANUAL 0.001V 0.0001V...
  • Page 61 Model UT61A/61B/61C/61D/61E: OPERATING MANUAL...

  • Page 62: Maintenance

    Model UT61A/61B/61C/61D/61E: OPERATING MANUAL Maintenance 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 63: B.replacing The Battery

    Model UT61A/61B/61C/61D/61E: OPERATING MANUAL l Do not use or store the Meter in a place of humidity, high temperature, explosive, inflammable and strong magnetic field. B. Replacing the Battery figure 12...
  • Page 64 Model UT61A/61B/61C/61D/61E: OPERATING MANUAL Warning To avoid false readings, which could lead to possible electric shock or personal injury, replace the battery as soon as the battery indicator ìcî appears. Make sure the test leads are disconnected from the circuit being tested before opening the case bottom.

  • Page 65: C.replacing The Fuses

    Model UT61A/61B/61C/61D/61E: OPERATING MANUAL C. Replacing the Fuses figure 13...
  • Page 66 Model UT61A/61B/61C/61D/61E: OPERATING MANUAL Warning To avoid electrical shock or arc blast, or personal injury or damage to the Meter, use specified fuses ONLY in accordance with the following procedure. To test the fuse: (See figure 13) The Meter does not response when measuring current and transistor hFE, go to inspect the Meter built-in fuses if they are broken.
  • Page 67 Model UT61A/61B/61C/61D/61E: OPERATING MANUAL USB Serial Port (UT61B, UT61C , UT61D and UT61E only) It is optional at extra cost. Please refer to the ìInstallation Guide & Computer Interface Softwareî for installing and operating instructions of the UT61 Interface Program.
  • Page 68 Model UT61A/61B/61C/61D/61E: OPERATING MANUAL This operating manual is subject to change without notice. Copyright 2008 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...

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