Uni-Trend UT10A multimeter
Contents
1. Model UT10A OPERATING MANUAL Table of Contents 1 Table of Contents Title Page Overview 2 3 Unpacking Inspection 2 E 4 Safety Information z 2 5 2 5 Rules For Safe Operation amp z 5 6 International Electrical Symbols 9 The Meter Structure E 10 Functional Buttons _ _ _ _ __ __1 Measurement Operation 12 A DC Voltage Measurement 18 B AC Voltage Measurement 15 C Measuring Resistance 2 2 16 D Frequency and Duty Cycle Measurement 5 2 19 E Measuring Diodes amp Continuity gt x 20 F Capacitance Measurement 23 Title Sleep Mode General Specifications Accuracy Specifications A DC Voltage B AC Voltage C Resistance Test D Frequency E Duty Cycle F Diodes and Continuity Test G Capacitance Maintenance A General Service B Replacing the Battery Model UT10A OPERATING MANUAL Overview Overview AN Warning To avoid electric shock or personal injury2. Do not store the Meter in place of humidity high temperature explosive inflammable and strong magnetic field 35 SCREW figure 4 36 Model UT10A OPERATING MANUAL Maintenance 4 AA warning To avoid false readings which could lead to possible electric shock or personal injury replace the battery as soon as the battery indicator EX appears To replace battery 1 Disconnect the connection between the testing leads and the circuit under test 2 Turn the Meter OFF 3 Remove the screw from the case bottom separate the case bottom from the case top 4 Remove the battery and replace with a new 3V Button Battery CR2032 5 Rejoin the case bottom and the case top and install the screw END This operating manual is subject to change without notice 37 Model UT10A OPERATING MANUAL Copyright 2004 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 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 38
3. read the Safety Information and Rules for Safety Operation carefully before using the Meter Pocked Sized Digital Multimeter Model UT10A hereafter referred to as the Meter is a 3 3 4 digits with steady operations fashionable structure low power consumption and highly reliable hand held measuring instrument The Meter uses large scale of integrated circuit with double integrated A D converter as its core The Meter not only can measure AC DC Voltage AC DC Current Resistance Capacitance Frequency Diodes and Continuity but also has Relative Mode Data Hold Full Icon Display Duty Cycle and Sleep Mode features Model UT10A OPERATING MANUAL Unpacking Inspection Unpacking Inspection Open the package case and take out the Meter Check the following items carefully to see any missing or damaged part Item Description Gty 1 English Operating Manual 1 piece 2 Built In Test Lead 1 pair 3 Vinyl Holder 1 piece 4 3V Button Battery CR2032 1 piece In the event you find any missing or damage please contact your dealer immediately Model UT10A OPERATING MANUAL Safety Information Safety Information This Meter complies with the standards IEC61010 in pollution degree 2 overvoltage category II 300V and double insulation CAT II Local level appliance PORTABLE EQUIPMENT etc with smaller transient voltage overvoltages than CAT III Use the Meter only as specified i
4. before measuring resistance To measure resistance connect the Meter as follows 1 Set the rotary switch to JC0 3 range 2 Connect the test leads across with the object being measured The measured value shows on the display Note The test leads can add 0 10 to 0 30 of error to the resistance measurement To obtain precision readings in low resistance that is the range of 4002 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 17 Model UT10A OPERATING MANUAL Measurement Operation 7 For high resistance gt 1MQ it is normal taking several seconds to obtain a stable reading When there is no input for example in open circuit condition the Meter displays OL Whenresistance measurement has been completed disconnect the connection between the testing leads and the circuit under test 18 Model UT10A OPERATING MANUAL Measurement Operation 8 D Frequency and Duty Cycle Measurement see figure 3 with dotted line AX 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 readings may be obtained The testing resolution may vary from the inputted frequency and waveform the Meter resolution is based on the sine wave To measure frequency and duty cycle connect t
5. exit hold mode In Hold mode I is displayed and the present value is shown Press Hz DUTY at to step through DOV frequency and duty cycle measurement mode on the LCD will be disappeared Press Hz DUTY at ACV to step through ACV frequency and duty cycle measurement mode on the LCD will be disappeared The Meter will be at DCV 400mV or ACV 4V after stepping through frequency and duty cycle measurement mode Therefore it is necessary to turn the rotary switch or turn off and on the Meter to resume to autoranging mode when measuring higher voltage 11 Model UT10A OPERATING MANUAL Measurement Operation 1 Measurement Operation Make sure the Sleep Mode is not on if you found there is no display on the LCD after turning on the Meter Make sure the Low Battery Display E is not on otherwise false readings may be provided Pay extra attention to the A symbol which is located besides the input terminals of the Meter before carrying out measeurement 12 Model UT10A OPERATING MANUAL Measurement Operation 2 A DC Voltage Measurement see figure 2 figure 2 13 Model UT10A OPERATING MANUAL Measurement Operation 3 A warning To avoid harms to you or damages to the Meter from electric shock please do not attempt to measure voltages higher than 300V although readings may be obtained and take extra care when measuring high voltage To measure DC voltage conne
6. T10A OPERATING MANUAL Accuracy Specifications 3 B AC Voltage Range Resolution Accuracy Overload Protection 1Omv 1 2 3 300V DC 300V AC 4V 1mV 40V 300V 100mV Remarks Input Impedance 10MQ Frequency response 0Hz 400Hz Display effective value of sine wave mean value response 29 Model UT10A OPERATING MANUAL Accuracy Specifications 4 C Resistance Test Range Resolution Accuracy Overload Protection 4000 030 1 29642 4kQ 10 40kQ 100 1 2 250V AC Open circuit voltage 400kQ 1000 approx 0 45V AMO 1kQ 1 2 2 40MQ 10ko 1 5 2 Remarks 30 Model UT10A OPERATING MANUAL Accuracy Specifications 5 D Frequency Range Resolution Accuracy Overload Protection Remarks The inputted voltage Rose oik oe an 9HZ 1Hz 250V AC en 2 10kHz 0 5 3 21V 9 999kHz 0 001kHz When 10kH2 100kHz 99 99kHz 0 01kHz 230V rms 31 E Duty Cycle Model UT10A OPERATING MANUAL Accuracy Specifications 6 0 1 99 9 0 1 Range Resolution Overload Protection 250V AC Remarks Press Hz DUTY button at ACV or DCV T range to select Duty Cycle measurement mode Reading is only for reference F Diodes and Continuity Test 32 Function Range Resolution Input Protection Remarks Diode gt Open circuit voltage app
7. ct the Meter as follows 1 Set the rotary switch to range 2 Connect the test leads across with the object being measured with red test lead to the positive and black test lead to the negative The measured value shows on the display Note TheLCD displays the negative reading when the test lead connection is reversed When DC voltage measurement has been completed disconnect the connection between the testing leads and the circuit under test 14 Model UT10A OPERATING MANUAL Measurement Operation 4 B AC Voltage Measurement see figure 2 with dotted line AA warning To avoid harms to you or damages to the Meter from electric shock please do not attempt to measure voltages higher than 300V although readings may be obtained and take extra care when measuring high voltage To measure AC Voltage connect the Meter as follows 1 Set the rotary switch to ACV v range 2 Connect the test leads across with the object being measured The measured value shows on the display Note TheLCD displays the negative reading when the test lead connection is reversed WhenAC voltage measurement has been completed disconnect the connection between the testing leads and the circuit under test 16 Model UT10A OPERATING MANUAL Measurement Operation 6 AA warning To avoid damages to the Meter to the devices under test disconnect circuit power and discharge all the high voltage capacitors
8. e taken for there is danger of electric shock Use the proper terminals function and range for your measurements 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 diodes or capacitance Replace the battery as soon as the battery indicator EA appears With a low battery the Meter might produce false readings that can lead to electric shock and personal injury Remove the connection between the testing leads and the circuit being tested and turn the Meter power off before opening the Meter case Model UT10A OPERATING MANUAL Rules For Safe Operation 3 When servicing the Meter use only the same model number or identical electrical specifications replacement parts The internal circuit of the Meter shall not be altered at will to avoid damage of the Meter and any accident Soft cloth and mild detergent should be used to clean the surface of the Meter when servicing No abrasive and solvent should be used to prevent the surface of the Meter from corrosion damage and accident The Meter is suitable for indoor use Turn the Meter power off when it is not in use and take out the battery when not using for a long time C
9. 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 30V rms in AC to avoid personal dangerous To measure capacitance connect the Meter as follows 1 Set the rotary switch to n Q range 2 Press SELECT button to select capacitance test 3 Capacitance range open circuit has display value please select relative measuremnet mode by pressing RELATIVE button once 4 Connect the test leads across with the object being measured The measured value shows on the display 23 Model UT10A OPERATING MANUAL Measurement Operation 13 Note For testing the capacitor with polarity connect the red test lead to anode amp black test lead to cathode For measuring capacitance higher than 10uF it is normal taking several seconds to obtain a reading When capacitance measurement has been completed disconnect the connection between the testing leads and the circuit under test 24 Model UT10A OPERATING MANUAL Sleep Mode 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 15 minutes The Meter can be activated by pressing any functional buttons or turning the rotary switch When the Meter is activated by pressi
10. he Meter as follows 1 Set the rotary switch to ACV or range 2 Press Hz DUTY button select Frequency or Duty Cycle measurment mode 3 Connect the test leads across with the object being measured The measured value shows on the display Note When Hz or Duty Cycle measurement has been completed disconnect the connection between the testing leads and the circuit under test 19 Model UT10A OPERATING MANUAL Measurement Operation 9 E Measuring Diodes amp Continuity see figure 3 with dotted line 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 Never attempt to input over 60V in DC or 30V rms in AC to avoid personal dangerous Testing 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 a diode out of a circuit connect the Meter as follows 1 Set the rotary switch tom Q range 20 Model UT10A OPERATING MANUAL Measurement Operation 10 2 Press SELECT button to select diode test 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 comp
11. n 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 eguipment under test A Note identifies the information that user should pay attention on International electrical symbols used on the Meter and in this Operating Manual are explained on page 9 Model UT10A OPERATING MANUAL Rules For Safe Operation 1 Rules For Safe Operation waring 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 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 Inspect the test leads for damaged insulation or exposed metal Check the test leads for continuity Do not apply more than the rated voltage as marked on the Meter between the terminals or between any terminal and grounding 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 6 Model UT10A OPERATING MANUAL Rules For Safe Operation 2 When the Meter working at an effective voltage over 60V in DC or 30V rms in AC special care should b
12. ng SELECT button the Sleep Mode feature will be disabled 25 Model UT10A OPERATING MANUAL General Specifications General Specifications Maximum voltage between any Terminals and Grounding 300V rms or 300DCV Range Auto ranging Maximum Display 3999 3 3 4 digits Mesaurement Speed Updates 3 times second Operating Temperature 0 40 32 1 04 Relative Humidity 75 Storage Temperature 10 C 50 C 14 F 122 F Altitude Operating 2000m Storage 10000m Battery Type 3V button battery CR2032 Battery Deficiency At around lt 2 4 VDisplay g Data Holding Display 2 Negative reading Display Overloading Display OL Dimensions HxWxL 108x58x12mm Weight Approx 125g battery and test lead included Safety Compliances IEC61010 CAT II 300V overvoltage and double insulation standard Certificate C 26 Model UT10A OPERATING MANUAL Accuracy Specifications 1 Accuracy Specifications Accuracy reading b digits guarantee for 1 year Operating temperature 23 C 5 C Relative humidity lt 75 Temperature coefficient 0 1 x specified accuracy 1 C 27 Model UT10A OPERATING MANUAL Accuracy Specifications 2 A DC Voltage Range Resolution Accuracy Overload Protection Remarks 400mV O imV i 0 89643 AV Imv 300V DC Input Impedance 210MQ 40V 10mV 0 8 1 300V AC 300V 100mV 28 Model U
13. onent s cathode The LCD displays the nearest value of diode forward voltage drop Note Inacircuit a good diode should still produce a forward voltage drop reading of 0 5V to 0 8V however the reverse voltage drop reading can vary depending on the resistance of other pathways between the probe tips Connect the test leads properly as said above to avoid error display The LCD will display OL indicating open circuit for wrong connection The unit of diode is Volt V displaying the positive connection voltage drop value When diode testing has been completed disconnect the connection between the testing leads and the circuit under test 21 Model UT10A OPERATING MANUAL Measurement Operation 11 Testing for Continuity To test for continuity connect the Meter as below 1 Set the rotary switch toe 4 Q range 2 Press SELECT button to select continuity test 3 Connect the test leads across with the object being measured The buzzer sounds continuously if the resistance of a circuit under test is around less than 700 The LCD displays the resistance value of a circuit under test simultaneous Note When continuity testing has been completed disconnect the connection between the testing leads and the circuit under test 22 Model UT10A OPERATING MANUAL Measurement Operation 12 F Capacitance Measurement see figure 3 with dotted line warning To avoid damage to the Meter or to the
14. onstantly 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 Model UT10A OPERATING MANUAL International Electrical Symbols International Electrical Symbols E3 Deficiency of Built In Battery e p AC Alternating Current Capacitance Double Insulated Warning Refer to the Operating Manual Conforms to Standards of European Union Grounding P ia DC Direct Current Diode Continuity Test JBE Fuse Model UT10A OPERATING MANUAL The Meter Structure The Meter Structure see figure 1 WN LCD Display SELECT Button RELATIVE Mode Button DATA HOLD Button Hz DUTY Button Rotary Switch Black Test Lead Red Test Lead figure 1 10 Model UT10A OPERATING MANUAL Functional Buttons Functional Buttons Below table indicated for information about the functional button operations Button Operation Performed SELECT Press SELECT to switch between resistance capacitance continuity buzzer and diode measurement modes the Meter beeps Resistance measurement is default RELATIVE Press RELATIVE to enter and exit the REL mode in any measuring mode except in frequency duty cycle the Meter beeps DATA HOLD Hz DUTY Press HOLD once to enter hold mode Press HOLD again to
15. rox 1 5V Open circuit voltage approx Continuity 250V AC Q 45V 9 PP 2 0 10 Approx lt 70Q buzzer Buzzer beeps continuously Model UT10A OPERATING MANUAL Accuracy Specifications 7 G Capacitance Range Resolution Accuracy Overload Protection 4nF 0 001nF 40nF 0 01nF 400nF 0 1nF aur oor SA 40uF 0 01uF 200uF 04pF 5 10 33 Reading is only for reference Remarks Open circuit voltage around 0 45V Measuring under Relative moae When the tested capacitor is greater than 100uF the reading is only for reference Model UT10A OPERATING MANUAL Maintenance 1 Maintenance This section provides basic maintenance information including battery and fuse replacement instruction warning Do not 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 34 Model UT10A OPERATING MANUAL Maintenance 2 A General Service Periodically wipe the case with damp cloth and mild detergent Do not use chemical solvent To clean the terminals with cotton bar with detergent as dirt or moisture in the terminals can affect readings Turn the Meter OFF when it is not in use and take out the battery when not using for a long time
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