Model UT61A/61B/61C/61D/61E: OPERATING MANUAL Table of Contents Title 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 E.Testing Diodes F.Capacitance Measurement G.Frequency Measurement H.
Model UT61A/61B/61C/61D/61E: OPERATING MANUAL Title Page 35 37 38 39 39 39 40 40 41 41 41 42 43 44 46 49 52 55 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 General Specifications Accuracy Specifications A.DC Voltage B.AC Voltage C.DC Current D.AC Current E.
Model UT61A/61B/61C/61D/61E: OPERATING MANUAL Title F.Capacitance G.Frequency H.Diode Test I.Continuity Test J.Temperature K.Transistor hFE Maintenance A.General Service B.Replacing the Battery C.
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.
Model UT61A/61B/61C/61D/61E: OPERATING MANUAL Except where noted, the descriptions and instructions in this Operating Manual apply to all Model UT61A/UT61B/UT61C/UT61D/UT61E. Unpacking Inspection Open the package case and take out the Meter.
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. CAT III: Distribution level, fixed installation, with smaller transient overvoltages than CAT. IV. CAT IV: Primary supply level, overhead lines, cable systems etc.
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. Look for cracks or missing plastic. Pay attention to the insulation around the connectors.
Model UT61A/61B/61C/61D/61E: OPERATING MANUAL l l l l l l l l 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. When using the test leads, keep your fingers behind the finger guards. Disconnect circuit power and discharge all high-voltage capacitors before testing resistance, continuity and diodes.
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. A leaking battery will damage the Meter. International Electrical Symbols AC or DC Double Insulated Warning.
Model UT61A/61B/61C/61D/61E: OPERATING MANUAL The Meter Structure (see figure 1) 1 LCD Display 2 Functional Buttons 3 Blue button 4 Rotary Switch 5 Input Terminal: figure 1 10
Model UT61A/61B/61C/61D/61E: OPERATING MANUAL Rotary Switch Below table indicated for information about the rotary switch positions.
Model UT61A/61B/61C/61D/61E: OPERATING MANUAL Functional Buttons Below table indicated for information about the functional button operations. Button Hold BLUE Button RANGE Operation Performed Press and hold for 2 serconds to turn the display backlight on or off. Press to enter or exit data hold mode. Press to select the alternate feature Press RANGE to enter the manual ranging mode; the Meter beeps. Press RANGE to step through the ranges available for the selected function; the Meter beeps.
Model UT61A/61B/61C/61D/61E: OPERATING MANUAL Display Symbols No 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 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. Indicator for manual ranging mode. The input value is too large for the selected range.
Model UT61A/61B/61C/61D/61E: OPERATING MANUAL No 16 17 Symbol Meaning The REL is on to display the stored value minus the present value. : Ohm. The unit of resistance. k : kilohm. 1 x 103 or 1000 ohms. M : Megaohm. 1 x 106 or 1,000,000 ohms. V: Volts. The unit of voltage. mV: Millivolt. 1 x 10-3 or 0.001 volts. A: Amperes (amps). The unit of current. mA: Milliamp. 1 x 10-3 or 0.001 amperes µA : Microamp. 1x 10-6 or 0.000001 amperes F: Farad. The unit of capacitance. µF : Microfarad. 1 x 10-6 or 0.
Model UT61A/61B/61C/61D/61E: OPERATING MANUAL Measurement Operation A.
Model UT61A/61B/61C/61D/61E: OPERATING MANUAL Warning To avoid harms to you or damages to the Meter from electric shock, please do not attempt to measure voltages higher than 1000V although readings may be obtained. When measuring high voltage, take extra care to avoid electric shock. 1. Insert the red test lead into the V terminal and the black test lead into the COM terminal. 2. Set the rotary switch to V; DC measurement is default or press BLUE button to switch between DC and AC measurement mode. 3.
Model UT61A/61B/61C/61D/61E: OPERATING MANUAL Note l In each range, the Meter has an input impedance of 10M except mV range which input impedance is 3000M . This loading effect can cause measurement errors in high impedance circuits. 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.
Model UT61A/61B/61C/61D/61E: OPERATING MANUAL B.
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. Use proper terminals, function, and range for the measurement. When the testing leads are connected to the current terminals, do not parallel them across any circuit. To measure current, do the following: 1.
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.
Model UT61A/61B/61C/61D/61E: OPERATING MANUAL C.
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. To measure resistance, connect the Meter as follows: 1. Insert the red test lead into the terminal and the black test lead into the COM terminal. 2.
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Model UT61A/61B/61C/61D/61E: OPERATING MANUAL D.
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 testing for continuity. To avoid harm to yourself, do not input higher than DC 60V or AC 30V voltages. To test for continuity, connect the Meter as below: 1. Insert the red test lead into the terminal and the black test lead into the COM terminal. 2.
Model UT61A/61B/61C/61D/61E: OPERATING MANUAL E.
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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. l When diode 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 terminals of the Meter.
Model UT61A/61B/61C/61D/61E: OPERATING MANUAL F.
Model UT61A/61B/61C/61D/61E: OPERATING MANUAL 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. To measure capacitance, connect the Meter as follows: 1. Insert the red test lead into the terminal and the black test lead into the COM terminal. 2.
Model UT61A/61B/61C/61D/61E: OPERATING MANUAL n the tested capacitor is more than 100uF figure 8 31
Model UT61A/61B/61C/61D/61E: OPERATING MANUAL 300 4 4 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.
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.
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. 3. Place the temperature probe to the object being measured. After few seconds, the measured value shows on the display. 4. Press BLUE button to toggle between and temperature.
Model UT61A/61B/61C/61D/61E: OPERATING MANUAL I.
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 Note l When transistor measurement has been completed, disconnect all the connection between multi-purpose socket, transistor and the Meter.
Model UT61A/61B/61C/61D/61E: OPERATING MANUAL J.
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. 3. There will be three types of displays: ÿ LCD displays different size of digits to represent the strength of detected signal. ÿ When the LCD displays OL, the buzzer beeps and the red LED blinks.
Model UT61A/61B/61C/61D/61E: OPERATING MANUAL RANGE button l Press RANGE to enter the manual ranging mode; the Meter beeps. l Press RANGE to step through the ranges available for the selected function; the Meter beeps. l 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.
Model UT61A/61B/61C/61D/61E: OPERATING MANUAL For UT61E,Auto entering Data outputting mode.
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Model UT61A/61B/61C/61D/61E: OPERATING MANUAL General Specifications l Maximum Voltage between any Terminals and Grounding: Refer to the different ranges input protection voltage.. l l l l l l l l Fused Protection for AmA Input Terminal:1A H 240V 6x25mm. Fused Protection for 10A Input Terminal:10A H 240V 6x25mm. 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.
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Model UT61A/61B/61C/61D/61E: OPERATING MANUAL (0.
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Model UT61A/61B/61C/61D/61E: OPERATING MANUAL 4 4 4 4 4 4 57
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Model UT61A/61B/61C/61D/61E: OPERATING MANUAL 0.01Hz 0.
Model UT61A/61B/61C/61D/61E: OPERATING MANUAL 0.001V 0.
Model UT61A/61B/61C/61D/61E: OPERATING MANUAL Vac 61
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. To avoid electrical shock or damage to the Meter, do not get water inside the case. A. General Service l Periodically wipe the case with a damp cloth and mild detergent.
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.
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 "c" appears. Make sure the test leads are disconnected from the circuit being tested before opening the case bottom. To replace the battery: (See figure 12) 1. Turn the Meter power off and remove all connections from the terminals. 2.
Model UT61A/61B/61C/61D/61E: OPERATING MANUAL C.
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. To replace the Meterís fuse: (See figure 12) 1. Turn the Meter power off and remove all the connections from the terminals. 2.
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.
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.
