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UNI-T UT39E, Operating Manual

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UNI-T UT39E Operating Manual Download Page 22

To replace battery:
1. 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.
2. Press the Meter power off
3. Remove the screw from the battery compartment, and
    then take out the battery door from the battery
    compartment.
4. Remove the battery from the battery compartment.
5. Replace the battery with a new 9V battery (NEDA
    1604 or 6F22 or 006P).
6. Rejoin the battery door and the battery compartment,
    and install the screw

C. Replacing the Fuses  

(see figure 10)

( figure 10)

SCREW

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 replace the Meter’s fuse:
1. 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.
2. Press the Meter power off.
3. Remove the holster from the Meter.
4. Remove the screw from the battery compartment,
    and then take out the battery door.
5. Remove the screw inside the battery compartment
    and also the other two screws from the case bottom,
    and then separate the case bottom from the case top.
6. Remove the fuse by gently prying one end loose, and
    then take out the fuse from its bracket.

 22

Model UT39E: OPERATING MANUAL

Summary of Contents for UT39E

Page 1: ...asuring Resistance F Measuring Diodes Continuity G Frequency Measurement H Capacitance Measurement I 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 Frequency H Capacitance I Transistor Test Maintenance A General Service B Replacing the Battery C Replacing the Fuses 1...

Page 2: ...load protection The Meter not only can measure AC DC Voltage AC DC Current Resistance Capacitance Transistor Frequency Diodes and Continuity but also has Data Hold and Sleep Mode features The Meter comes with a holster which can provide sufficient and anti shaking Unpacking Inspection Open the package case and take out the Meter Check the following items carefully to see any missing or damaged par...

Page 3: ...rmation that user should pay attention on International electrical symbols used on the Meter and in this Operating Manual are explained on page 5 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 Before using the Meter inspect the case Do not use the Meter if it...

Page 4: ...er to the circuit Replace the battery as soon as the battery indicator appears With a low battery the Meter might produce false readings that can lead to electric shock and personal injury Remove test leads from the Meter and turn the Meter power off before opening the Meter case When servicing the Meter use only the same model number or identical electrical specifications replacement parts The in...

Page 5: ... to Standards of European Union Grounding DC Direct Current Diode Continuity Test Fuse The Meter Structure see figure 1 1 LCD Display 2 Data Hold Button 3 Transistor Jack 4 COM Input Terminal 5 Other Input Terminals 6 mA Input Terminal 7 20A Input Terminal 8 Capacitance Jack 9 Rotary Switch 10 Power figure 1 1 2 3 4 7 8 9 10 5 6 5 Model UT39E OPERATING MANUAL ...

Page 6: ... hold mode In Hold mode is displayed and the present value is shown l l l l l Display Symbols see figure 2 figure 2 Symbol hFE 0 C No 1 2 3 4 5 6 7 8 Meaning Data hold is active Indicates negative reading 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 Unit of Transistor C...

Page 7: ...ou or damages to the Meter from electric shock please do not attempt to measure voltages higher than 1000V or 750V rms although readings may be obtained Take extra attention when measuring high voltages to avoid electric shock figure 3 To measure DC voltage connect the Meter as follows 1 Insert the red test lead into the VΩ input terminal and the black test lead into the COM input terminal 2 Set t...

Page 8: ...C Voltage Measurement see figure 3 with dotted line Warning To avoid harms to you or damages to the Meter from electric shock please do not attempt to measure voltages higher than 1000V or 750V rms although readings may be obtained Take extra attention when measuring high voltages to avoid electric shock To measure AC Voltage connect the Meter as follows 1 Insert the red test lead into the VΩ term...

Page 9: ...connect the connection between the testing leads and the circuit under test l l l C DC Current Measurement see 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 If the fuse burns out during measurement the Meter may be damaged or the operator himself may be hurt Disconnect power supply befo...

Page 10: ...he COM terminal When measuring current at 200mA below insert the red test lead into mA terminal while measuring current 200mA or above insert the red test lead into 20A terminal 3 Set the rotary switch to an appropriate measurement position in A range 4 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 ...

Page 11: ...he more positive side of the break and the black test lead to the more negative side of the break 5 Turn on power to the circuit The measured value shows on the display 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 Replace appropriate rating fuse when the fuse is...

Page 12: ...the display figure 5 The test leads can add 0 1Ω to 0 3Ω of error to the resistance measurement To obtain precision readings in low resistance that is the range of 200Ω short circuit the red and black test leads beforehand and record the reading obtained called this reading as X Then use the equation measured resistance value Y X precision readings of resistance For high resistance 1MΩ it is norma...

Page 13: ...d into the COM terminal 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 LCD displays the nearest value of diode forward voltage drop In a circuit a good diode should still produce a forward voltage drop reading of 0 5V to 0 8V however the rever...

Page 14: ... circuit under test The LCD displays 1 indicating the circuit being tested is open When continuity testing has been completed disconnect the connection between the testing leads and the circuit under test l l Note G Frequency Measurement see figure 6 figure 6 Warning To avoid harm to you or damages to the Meter do not attempt to measure voltages higher than 60V in DC or 30V rms in AC although read...

Page 15: ...rning To avoid damage to the Meter or to the equipment under test disconnect the tested circuit power when measuring on line capacitors and discharge all high voltage capacitors before measuring capacitance Use the DC voltage function to confirm that the capacitor is discharged Never attempt to input over 60V in DC or 3V rms in AC to avoid personal dangerous figure 7 To measure capacitance connect...

Page 16: ...zeroing when changing over the measurement range This process will not affect the accuracy of the final readings obtained l l l l Note I Measuring Transistor see figure 8 figure 8 To measure transistor connect the Meter as follows 1 Set the rotary switch to hFE 2 Insert the NPN or PNP type transistor to be tested into the transistor jack 3 The measured nearest transistor value shows on the display...

Page 17: ...20A Input Terminal Un fused Range Manual ranging Maximum Display 19999 Mesaurement Speed Updates 2 3 times second Temperature Operating 00 C 400 C 320 F 1040 F Storage 100 C 500 C 140 F 1220 F Relative Humidity 75 00 C 300 C 50 310 C 400 C Altitude Operating 2000m Storage 10000m Battery Type 9V NEDA1604 or 6F22 or 006P Battery Deficiency Display Data Holding Display Negative reading Display Overlo...

Page 18: ... 250V DC or AC rms 1000V DC or 750V rms Remark Input impedance 10MΩ B AC Voltage Range 2V 20V 200V 750V Resolution 0 0001V 0 001V 0 01V 0 1V Accuracy 0 5 10 0 8 15 Overload Protection 1000V DC or 750V rms Remark Input impedance 2MΩ Frequency response 40Hz 400Hz Display effective value of sine wave mean value response l l l l C DC Current Range 2mA 200mA 20A Resolution 0 0001mA 0 01mA 0 001A Accura...

Page 19: ...normal to display 100 digits During measurement subtract the 100 digits from the reading When measuring at the range of 200Ω short circuit the red and black test leads beforehand to display the test lead s resistance value Then use the measured value minus this test lead s resistance value to obtain the correct tested resistance value Remark l l At 20A Range For continuous measurement 10 seconds a...

Page 20: ... 5 1 5 5 Overload Protection 250V rms Remark l l Input Sensitivity 200mV When the input voltage is 30V rms no guaranteed accuracy H Capacitance Range 2nF 20nF 200nF 20µF Resolution 0 0001nF 0 001nF 0 01nF 0 001µF Accuracy 4 10 Overload Protection 250V rms Remark Testing signal approx 400Hz 40mV rms l I Transistor Test Range hFE Remarks Can measure NPN or PNP transistor Display range 0 1000β Testin...

Page 21: ...ent as dirt or moisture in the terminals can affect readings Press the Meter power off when it is not in use and take out the battery when not using for a long time Do not store the Meter in place of humidity high temperature explosive inflammable and strong magnetic field l l l l B Replacing the Battery see figure 9 Warning To avoid false readings which could lead to possible electric shock or pe...

Page 22: ...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 replace the Meter s fuse 1 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 2 Press the Meter power off 3 Remove the holster from the Mete...

Page 23: ...0mm 8 Rejoin the case bottom and the case top and install the screw 9 Rejoin the battery door from the battery compartment and install the screw 10 Rejoin the holster and the Meter 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 23 Model UT39E OPERATING MANUAL ...

Page 24: ...n Dong Fang Industrial Development District Hu Men Town Dongguan City Guang Dong Province China Postal Code 523 925 Headquarters Uni Trend Group Limited 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 24 Model UT39E OPERATING MANUAL ...

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