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UNI-T UT58D, Operating Manual, Page: 11 / 34

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UNI-T UT58D Operating Manual Download Page 11

Functional Buttons

Below table indicated for information about the functional
button operations

HOLD
(Blue
Button)

POWER

( Ye l l o w
B u t t o n )

Turn the Meter on and off.

l

   Press down the 

POWER

 to turn on the

      Meter.

l

   Press up the 

POWER 

to turn off the

      Meter.

l

   Press 

HOLD

 once to enter hold mode.

l

   Press 

HOLD

 again to exit hold mode.

l

   In Hold mode,     is displayed and the

      present value is shown.

Model UT58D: OPERATING MANUAL

 11

Summary of Contents for UT58D

Page 1: ...nd AC Current Measurement C Measuring Resistance D Measuring Diodes and Continuity E Testing for lnductance F Capacitance measurement G Measuring Transistor Sleep Mode General Specifications Accuracy Specifications A DC Voltage B AC Voltage C DC Current D AC Current E Resistance Test F Diodes and Continuity Test G lnductance H Capacitance I Transistor Test 3 10 4 11 12 14 14 15 17 19 21 22 24 26 2...

Page 2: ...Maintenance A General Services B Replacing the Fuses C Replacing the Battery Title Page 31 31 31 32 Model UT58D OPERATING MANUAL 2 ...

Page 3: ... structure and highly reliable hand held measuring instrument The Meter uses large scale of integrated circuit with double integrated A D converter as its core and has full range overload protection The Meter has 28 different measuring functions It has not only can measure AC DC Voltage AC DC Current Resistance Capacitance Transistor Diode and Continuity but also have Inductance Data Hold Full Ico...

Page 4: ...ng or damaged part In the event you find any missing or damage please contact your dealer immediately 1 English Operating Manual 1 piece 2 Test Lead 1 pair 3 Multi Purpose Socket 1 piece 4 Test Clip 5 Holster 6 9V Battery NEDA 1604 6F22 or 009P 1 piece 1 piece 1 piece Item Description Qty 4 Model UT58D OPERATING MANUAL ...

Page 5: ...n with smaller transient overvoltages than CAT IV Use the Meter only as specified in this operating manual otherwise the protection provided by the Meter may be impaired In this manual a Warning identifies conditions and actions that pose hazards to the user or may damage the Meter or the equipment under test A Note identifies the information that user should pay attention to International electri...

Page 6: ... voltage as marked on the Meter between the terminals or between any terminal and grounding l The rotary switch should be placed in the right position and no any changeover of range shall be made during measurement is conducted to prevent damage of the Meter l When the Meter working at an effective voltage over 60V in DC or 30V rms in AC special care should be taken for there is danger of electric...

Page 7: ...power off before opening the Meter case l When servicing the Meter use only the same model number or identical electrical specifications replacement parts l The internal circuit of the Meter shall not be altered at will to avoid damage of the Meter and any accident l Soft cloth and mild detergent should be used to clean the surface of the Meter when servicing No abrasive and solvent should be used...

Page 8: ...lternating Current DC Direct Current Grounding Double Insulated Deficiency of Built In Battery Warning Refer to the Operating Manual Conforms to Standards of European Union Diode AC or DC Fuse Continuity Test Model UT58D OPERATING MANUAL 8 ...

Page 9: ...del UT58D OPERATING MANUAL The Meter Structure see 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 figure 1 ...

Page 10: ... indicated for information about the rotary switch positions DC voltage measurement AC voltage measurement Transistor Test AC Current Measurement DC Current Measurement Fcx Capacitance Test HLx Inductance Test Diode test Continuity test Resistance measurement ...

Page 11: ...e Button POWER Yellow Button Turn the Meter on and off l Press down the POWER to turn on the Meter l Press up the POWER to turn off the Meter l Press HOLD once to enter hold mode l Press HOLD again to exit hold mode l In Hold mode is displayed and the present value is shown Model UT58D OPERATING MANUAL 11 ...

Page 12: ...s the battery indicator appears 4 Indicates negative reading 5 Test of diode 6 The continuity buzzer is on 7 Date hold is active 8 Indicator for AC voltage or current The displayed value is the mean value 3 AC Connect Terminal Indicator of connecting test leads into different input terminals 2 Warning Symbol 12 Model UT58D OPERATING MANUAL ...

Page 13: ...The unit of current mA Milliamp 1 x 10 3 or 0 001 amperes V Volts The unit of voltage mV Millivolt 1 x 10 3 or 0 001 volts No Symbol Meaning 9 hFE The Unit of Transistor Test 10 15 mH H H Henry The unit of Inductance mH Millihenry 1 x 10 3 or 0 001 henry ...

Page 14: ...0V and 1000V To measure DC Voltage connect the Meter as follows 1 Insert the red test lead into theV input terminal and the black test lead into the COM input terminal 2 Set the rotary switch to an appropriate measurement position in V or V range 3 Connect the test leads parallel across with the object to be measured The measured value shows on the display ...

Page 15: ...er range in order to obtain a correct reading l In each range the Meter has an input impedance of approx 10M 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 When DC voltage measurement has been completed disconnect the connection between the testing leads and the circuit under te...

Page 16: ...n the rotary switch 2mA 200mA and 20A To measure current do the following 1 Turn off power to the circuit Discharge all high voltage capacitors 2 Insert the red test lead into the 20A or mA input terminal and the black test lead into the COM terminal When you measure current below 200mA please insert the red test lead into the mA input terminal When you measure 200mA or above insert the red test l...

Page 17: ...rrent 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 should be less than 10 seconds and the interval time between 2 measurements should be greater than 15 minutes l When current measurement has been completed disconnect the connection between the testing ...

Page 18: ...curate readings in low resistance short circuit the input terminals beforehand and record the reading obtained called this reading as X X is the additional resistance from the test lead Then use the equation measured resistance value Y X accurate readings of resistance l For high resistance 1M it is normal taking several seconds to obtain a stable reading l When there is no input for example in op...

Page 19: ... to you never attempt to input voltages higher than 60V DC or 30V rms in AC Measurement Operation 6 figure 6 Black Red Measuring Diodes Use the diode test to check diodes transistors and other semiconductor devices The diode test sends a current through the semiconductor junction and then measures the voltage drop across the junction A good silicon junction drops between 0 5V and 0 8V To test out ...

Page 20: ...ect being measured 4 The buzzer does not sound if the resistance of a circuit under test is 70 The tested circuit resistance value simultaneously shows on the display and the unit is 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 The measured valu...

Page 21: ...curate reading figure 7 Inductance measurement has 4 measurement positions on the rotary switch 2mH 20mH 200mH and 20H To test for Inductance connect the Meter as below 1 According to the size of the tested object s leads insert multi purpose socket or test clip into the mA and V terminal 2 Set the rotary switch to an appropriate measurement position in HLx range 3 Insert the tested object into th...

Page 22: ... 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 avoid harms to you never attempt to input voltages higher than 60V DC or 30V rms in AC ...

Page 23: ...p until a satisfactory reading is obtained l When the tested capacitor is shorted or the capacitor value is overloaded the LCD display 1 l To minimize the measurement error caused by the distributed capacitor the testing lead should be as short as possible l To increase accuracy especially when measuring small capacitance range 20nF the correct reading is subtracting the test lead open circuit val...

Page 24: ...Model UT58D OPERATING MANUAL 24 Measurement Operation 11 figure 9 ...

Page 25: ...or press any button for around 15 minutes When the Meter is under sleep mode it consumes 10µA current To activate the Meter press POWER for two times Operation of Hold Mode Warning To avoid possibility of electric shock do not use Hold mode to determine if circuits are without power The Hold mode will not capture unstable or noisy readings ...

Page 26: ......

Page 27: ...Model UT58D OPERATING MANUAL 27 ...

Page 28: ...28 Model UT58D OPERATING MANUAL ...

Page 29: ...29 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: ...30 Model UT58D OPERATING MANUAL ...

Page 31: ...void electrical shock or damage to the Meter do not get water inside the case A General Service l Periodically wipe the case with damp cloth and mild detergent Do not use chemical solvent l To clean the terminals with cotton bar with detergent as dirt or moisture in the terminals can affect readings l Turn the Meter off when it is not in use and take out the battery when not using for a long time ...

Page 32: ...Model UT58D OPERATING MANUAL 32 Maintenance 2 ...

Page 33: ...rating manual is subject to change without notice 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 Maintenance 3 ...

Page 34: ...velopment District Hu Men Town Dong Guan City Guang Dong Province China Headquarters Uni Trend International Limited Address Rm901 9 F Nanyang Plaza 57 Hung To Road Kwun Tong Kowloon Hong Kong Tel 852 2950 9168 Fax 852 2950 9303 Email info uni trend com http www uni trend com Copyright 2001 Uni Trend International Limited All rights reserved ...

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