Uni-Trend UT201 multimeter
Contents
1. Model UT201 202 OPERATING MANUAL Measurement Operation 5 D Testing Diodes see figure 6 red B black figure 6 L 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 diodes Use the diode test to check diodes transistors and other semiconductor devices The diode test sends a current through the semicondutor junction then measure the voltage drop across the junction A good silicon junction drops between 0 5V and 0 8V To test the diode out of a circuit connect the Meter as follows 1 Insert the red test lead into thesuyY VO terminal and the black test lead into the COM terminal 2 Set the rotary switch toQ w 4 and press SELECT button to select measurement mode 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 19 Model UT201 202 OPERATING MANUAL Measurement Operation 6 Note In a circuit a good diode should still produce a forward voltage drop reading of 0 5V to 0 8 however the reverse voltage drop reading can vary depending on the resistance of other pathways between the probe tips Connect the test leads to the proper terminals as said above to avoid error display The LCD will display OL indicating either open circuit or wrong polarity connec2. Model UT201 202 OPERATING MANUAL Table of Contents Title Page Overview 3 Unpacking Inspection 4 Safety Information m 5 Rules For Safe Operation 6 International Electrical Symbols 8 The Meter Structure 9 Rotary Switch Z 10 Functional Buttons 11 The Effectiveness of Functional Buttons 12 Display Symbols 13 Measurement Operation 7 15 A DC Voltage Measurement 15 B AC Voltage Measurement 16 C Measuring Resistance 17 D Testing Diodes 19 E Testing for Continuity 20 F Temperature Measurement 22 G AC Current Measurement 23 Sleep Mode 25 Specifications 26 A General Specifications HA 26 B Environmental Restriction 26 Accuracy Specifications 27 A AC Voltage 27 B DC Voltage 27 C Resistance 28 D Continuity Test 28 E Diode Test 28 F Temperature E 29 G AC Current 29 Maintenance E 2 30 A General Service 30 B Replacing the Battery _ _ 30 Model UT201 202 OPERATING MANUAL Model UT201 202 OPERATING MANUAL Overview This Oper
3. Safety Compliances Operating 2000m Storage 10000m IEC 61010 CAT II 600V CAT III 300V over voltage and double insulation standard Temperature and humidity Operating 0 C 30 C lt 75 R H 30 C 40 C lt 70 R H 40 C 50 C lt 45 R H Storage 20 C 60 C lt 75 kR H 26 Model UT201 202 OPERATING MANUAL Accurate Specifications 1 Accuracy a reading b digits guarantee for 1 year Operating temperature 23 C 5 C Relative humidity 75 R H Temperature coefficient 0 1x specified accuracy 1 C A AC Voltage Auto ranging Range Resolution Accuracy Overload Protection 2000V 20 00V 1 2 5 600V rms 200 0V 100mV 600V 1 5 5 Remarks Input impedance 10MQ lt 100pF Displays effective value of sine wave mean value response Frequency response 40Hz 1kHz To adjust reading in accordance with effective value B DC Voltage Auto ranging Accuracy da 0 8 3 600V rms 0 8 1 Remarks Input impedance 10MQ 27 Model UT201 202 OPERATING MANUAL Accurate Specifications 2 C Resistance Auto ranging Overload Accuracy Protection 1 2 2 1 2 600Vp 2 000MQ 1kQ 1 2 2 20 00MQ 10kQ 1 5 2 Remarks Input impedance 10MA D Continuity Test Accuracy Sveriges Aroundg buzzer beeps Remark Open circuit voltage approximate 0 45V The buzzer may or may not
4. case with a damp cloth and mild detergent Do not use abrasives or solvents To clean the terminals with cotton bar with detergent as dirt or moisture in the terminals can affect readings Turn the Meter power off when it is not in use Take out the battery when it is not using for a long time Do not use or store the Meter in a place of humidity high temperature explosive inflammable and strong magnetic field B Replacing the Battery see figure 10 Screw figure 10 30 Model UT201 202 OPERATING MANUAL MAINTENANCE 2 A warning To avoid false readings which could lead to possible electric shock or personal injury replace the battery as soon as the battery indicator 4 appears Make sure the transformer jaw and the tets leads are disconected from the circuit being tested before opening the case bottom To replace the battery 1 Turn the Meter off and remove all the connections from the input terminals 2 Turn the Meter s case top down 3 Remove the screw from the battery compartment and separate the battery compartment from the case bottom 4 Remove the old battery from the battery compartment 5 Replace the battery with 2pcs of new 1 5V AAA battery 6 Rejoin the case bottom and the battery compartment and reinstall the screw END This operating manual is subject to change without notice 31 Model UT201 202 OPERATING MANUAL Copyright 2001 Uni Trend Gro
5. lever to open the transformer jaws When the pressure on the lever is released the jaws will close 6 Hand Guards to protect user s hand from touching the dangerous area 7 Transformer Jaws designed to pick up the AC current flowing through the conductor It could transfer current to voltage OV OO NO Model UT201 202 OPERATING MANUAL Rotary Switch Below table indicated for information about the rotary switch positions Rotar x Switc Function Position OFF Power is turned off VN AC DC voltage measurement gt J Diode test e Continuity test Q Q Resistance measurement CF Temperature measurement UT202 only AW AC current measurement range from 0 001A to 400 0A 10 Model UT201 202 OPERATING MANUAL Functional Buttons 1 Below table indicated for information about the functional button operations AC voltage measurement Press HOLD Hito enter and exit the Hold mode in any mode the Meter beeps Press and hold HOLD Hibutton while turning on the Meter to display full icons MAX Press MAX to start recording and updating of maximum values SELECT Press SELECT button to switch between Q and CF HOLD H 11 Model UT201 202 OPERATING MANUAL The Effectiveness of Functional Buttons Not every functional buttons can be used on every rotary switch positions Below two tables describe which fu
6. LE EQUIPMENT etc with smaller transient overvoltages than CAT III CAT Ill Distribution level fixed installation 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 electrical symbols used on the Meter and in this Operating Manual are explained on page 8 Model UT201 202 OPERATING MANUAL Rules For Safe Operation 1 A warning To avoid possible electric shock or personal injury and to avoid possible damage to the Meter orto the eguipment 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 Replace damaged test leads with identical model number or electrical specifications before using the Meter Do not apply more than the rated voltage as marked on the Meter between the terminals or between any terminal and grounding If the value to be measured is unknown use the maxim
7. PERATING MANUAL Measurement Operation 9 G AC Current Measurement see figure 9 figure 9 Awarning To avoid electric shock never measure current while the test leads are inserted into the input terminals and disconnect test leads and tested circuit connection Never attempt an in circuit current measuremnet where the open circuit voltage between the circuit and the ground is greater than 600V Use proper function and range for the measurement The measuremnet ranges of current are 2 000A 20 00A 200 0A and 400A To measure current do the following 1 Set the rotary switch to 2 20A or 200 400 A 2 Press the lever to open the transformer jaws 3 Center the conductor within the transformer jaw The measured value shows on the display it is a effective value of sine wave mean value response 23 Model UT201 202 OPERATING MANUAL Measurement Operation 10 Note To obtain accurate reading measure only one conductor at each time When current measurement has been completed disconnect the connection between the conductor under test and the jaw and remove the conductor away from the transformer jaw of the Meter 24 Model UT201 202 OPERATING MANUAL 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 turning the rotary switch or pressing any button wit
8. ating Manual covers information on safety and cautions Please read the relevant information carefully and observe all the Warnings and Notes strictly Awarning To avoid electric shock or personal injury read the Safety Information and Rules for Safe Operation carefully before using the Meter Digital Multimeter Model UT201 202 hereafter referred to as the Meter are 3 1 2 digits with steady operations fashionable structure and highly reliable 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 can measure AC DC Voltage AC Current Resistance Temperature F C Diodes Continuity and so on Model UT201 202 OPERATING MANUAL 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 Qty 1 English Operating Manual 1 piece 2 Test Lead 1 pair 3 Point Contact Temperature Probe 1 piece UT202 only 4 11 5V Battery AAA 2 pieces In the event you find any missing or damage please contact your dealer immediately Model UT201 202 OPERATING MANUAL Safety Information This Meter complies with the standards IEC61010 in pollution degree 2 overvoltage category CAT Il 600V CAT III 300V and double insulation CAT Il Local level appliance PORTAB
9. beeps when the resistance of a circuit under test is between 502 and 1202 The buzzer may not beep when the resistance of a circuit under test is greater than 120 E Diode Test Range Resolution Accuracy Overload Display approximate i imV forward voltage drop 600Vp 0 5V 0 8V Remarks Open circuit voltage approximate 1 48V 28 Model UT201 202 OPERATING MANUAL Accurate Specifications 3 F Temperature UT202 Only 40 1000 C 40 F 1832 F Resolution Accuracy ea F 1832F 2 18 Overload Protection G AC Current Auto ranging Range Resolution Accuracy Response Frequency Overload Protection 2 000A 0 001A lt 1A 4 40 gt 1A 3 30 20 00A 0 01A 200 04 8 12 2 8 50Hz 60Hz S4A 1 5 5 400A rms Remarks Displays effective value of sine wave mean value response To adjust reading in accordance with effective value 29 Model UT201 202 OPERATING MANUAL MAINTENANCE 1 This section provides basic maintenance information including battery replacement instruction ZA 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 Periodically wipe the
10. ces under test disconnect circuit power and discharge all the high voltage capacitors before measuring resistance 17 Model UT201 202 OPERATING MANUAL Measurement Operation 4 The resistance ranges are 200 052 2 000k22 20 00k 2 200k 2 2 000M 2 and 20 00MQ To measure resistance connect the Meter as follows ii 2 Insert the red test lead into the VO terminal and the black test lead into the COM terminal Set the rotary switch toQ 4 resistance measurement Q is default or press SELECT button to select Q measurement mode Connect the test leads across with the object being measured The measured value shows on the display Note The test leads can add 0 1Q to 0 3Q of error to resistance measurement For high resistance measurement gt 1MQ it is normal taking several seconds to obtain a stable reading If reading with shorted test leads is not lt 0 5Q check for loose test leads wrong function selected or enabled data hold function The LCD displays OL indicating open circuit or the tested resistor value is higher than the maximum range of the Meter Resistance measurement is default to auto range mode To remove the objects being tested from the circuit when measuring can obtain a more accurate result When resistance measurement has been completed disconnect the connection between the testing leads and the circuit under test and remove testing leads from the input terminals 18
11. e MQ Megaohm 1 x 10 or 1 000 000 ohms 13 Model UT201 202 OPERATING MANUAL Display Symbols 2 see figure 2 No Symbol Meaning 11 A Amperes amps The unit of current 12 mV V_ Volts The unit of voltage mV Millivolt 1x10 or 0 001 volts 13 Indicates negative reading 14 OL The input value is too large for the selected range 14 Model UT201 202 OPERATING MANUAL Measurement Operation 1 A DC Voltage Measurement see figure 3 figure 3 A warning To avoid harms to you or damages to the Meter from eletric shock do not attempt to measure voltages higher than 600V AC DC although readings may be obtained The DC Voltage ranges are 200 0mV 2 000V 20 00V 200 0V and 600V To measure DC voltage connect the Meter as follows 1 Insert the red test lead into the 1 gt VQ terminal and the black test lead into the COM terminal 2 Set the rotary switch to Vs 3 Connect the test leads across with the object being measured The measured value shows on the display Note I In each range the Meter has an input impedance of 10M This loading effect can cause measurement errors in high impedance circuits If the circuit impedance is less than or equal to 10kQ the error is negligible 0 1 or less 15 Model UT201 202 OPERATING MANUAL Measurement Operation 2 When DC voltage measurement has been completed disconnect the con
12. et not to beep The buzzer beeps 5 times continuously on around 1 minute before entering the sleep mode When it is just before entering the sleep mode it will have one long beep to warn you The LCD displays OL 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 and remove testing leads from the input terminals 21 Model UT201 202 OPERATING MANUAL Measurement Operation 8 F Temperature Measurement UT202 Only see figure 8 red black figure 8 The temperature measurement ranges are 40 C 1000 C and 40 F 1832 F To measure temperature connect the Meter as follows 1 3 No Insert the red temperature probe into thed VQ terminal and the black temperature probe into the COM terminal Set the rotary switch to F C and press SELECT button to select F or C measurement mode C measurement mode is default Place the temperature probe to the object being measured ie measured value shows on the display The Meter automatically displays the temperature value inside the Meter when there is no temperature probe connection When temperature measurement has been completed disconnect the connection between the temperature probe and the circuit under test and remove the temperature probe away from the input terminals of the Meter 22 Model UT201 202 O
13. h the following conditions 1 When the Meter is entered Sleep Mode at temperature functions of Model UT202 the Meter cannot be activated by turning the rotary switch to AC current ranges 2 By pressing any button must be according to The Effectiveness of Functional Buttons on page 12 3 The Hold function will be cancelled if the Meter is activated by pressing the HOLD button To disable the Sleep Mode function press and hold HOLD button while turning on the Meter 25 Model UT201 202 OPERATING MANUAL Specifications A General Specifications Maximum voltage including transient overvoltage between any terminals and grounding 500V rms Display 3 1 2 digits LCD display Maximum display 1999 Auto Polarity Display Overloading Battery Deficiency Measurement Speed Display OL or OL Display Updates 3 times second Measuremnet Deviation When the conductor being Drop Test Max Jaw Size Projected Max Current conductor size Power Battery Life meaured is not placed in a correct position during AC current measurement it will cause 1 reading deviation 1 meter drop test passed 28mm diameter 26mm diameter 2pcs of 1 5V battery AAA typically 150hours alkaline battery Sleep Mode can be disabled Dimensions H x W x L 30mm x 76mm x 208mm Weight Approximate 260g battery included B Environmental Restrictions The Meter is suitable for indoor use Altitude
14. nctional buttons can be used on which rotary switch positions Model UT201 Rotary Switch Positions Functional Buttons SELECT MAX HOLD H Vu N A e V N A e on Q N A N A a E e N A D A 2 20A N A A 200 400A N A Model UT202 Rotary Switch Positions Functional Buttons SELECT MAX HOLD H Vu N A e V rv N A e a Q JE e N A e F C K Type N A D A N 2 20A N A e A 200 400A N A e e 12 Model UT201 202 OPERATING MANUAL Display Symbols 1 see figure 2 4 56 78 3 Taos EV 1 Max ETA 9 E IGG M 11 AC i a Pa BA 14 No Symbol Meaning 1 AC Indicator for AC voltage or current 2 DC Indicator for DC voltage The battery is low A Warning To avoid false readings 3 ES which could lead to possible electric shock or personal injury replace the battery as soon as the battery indicator appears The Meter is in the auto range model in which the Meter automatically selects the range with the best resolution Test of diode n The continuity buzzer is on MAX Maximum reading displayed Date hold is active OlON Iain gt A c F The unit of temperature C Centigrade temperature F Fahrenheit temperature Q Ohm The unit of resistance KQ kilohm 1 x 10 or 1000 ohms 1 Y pam
15. nection between the testing leads and the circuit under test and remove testing leads from the input terminals B AC Voltage Measurement see figure 4 red black figure 4 ZA warning To avoid harms to you or damages to the Meter from eletric shock do not attempt to measure voltages higher than 600V AC DC although readings may be obtained The AC Voltage ranges are 2 000V 20 00V 200 0V and 600V To measure AC voltage connect the Meter as follows 1 Insert the red test lead into the VQ terminal and the black test lead into the COM terminal 2 Set the rotary switch to Vaw 3 Connect the test leads across with the object being measured The measured value shows on the display 16 Model UT201 202 OPERATING MANUAL Measurement Operation 3 Note In each range the Meter has an input impedance of 10M amp Q This loading effect can cause measurement errors in high impedance circuits If the circuit impedance is less than or equal to 10kQ the error is negligible 0 1 or less When AC voltage measurement has been completed disconnect the connection between the testing leads and the circuit under test and remove testing leads from the input terminals C Measuring Resistance see figure 5 red fy black figure 5 A warning To avoid harms to you do not attempt to input voltages higher than 60V DC or 30V rms AC To avoid damages to the Meter or to the devi
16. r Exappears With a low battery the Meter might produce false readings that can lead to electric shock and personal injury 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 off when it is not in use and take out the battery when not using for a long time 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 7 Model UT201 202 OPERATING MANUAL International Electrical Symbols AC Alternating Current DC Direct Current AC or DC Grounding 8 Double Insulated ea Deficiency of Built In Battery 1 Continuity Test Diode Capacitance Test Fuse Warning Refer to the Operating Manual FP Conforms to Standards of European Union Model UT201 202 OPERATING MANUAL The Meter Structure see figure 1 figure 1 Input Terminals LCD Display Functional Buttons Rotary Switch Trigger press the
17. tion The unit of diode is volt V displaying the forward voltage drop readings To remove the objects being tested from the circuit when measuring can obtain a more accurate result When diode testing has been completed disconnect the connection between the testing leads and the circuit under test and remove testing leads from the input terminals E Testing for Continuity see figure 7 red black figure 7 20 Model UT201 202 OPERATING MANUAL Measurement Operation 7 A 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 continuity To test for continuity connect the Meter as follows 1 2 3 4 5 Insert the red test lead into the m VQ terminal and the black test lead into the COM terminal Set the rotary switch to Q a gt and press SELECT button to select measurement mode The buzzer sounds if the resistance of a circuit under test is less than 50 Q The buzzer may or may not sounds if the resistance of a circuit under test is between 50 Q to 1202 The buzzer does not sound if the resistance of a circuit under test is higher than 120Q Note The buzzer beeps once when pressing any buttons at any rotary switch positions except at 2 20A positions if the button is valid If the button is not valid it does not beep At 2 20A rotary switch position the buzzer is s
18. um measurement position and reduce the range step by step until a satisfactory reading is obtained When measurement has been completed disconnect the connection between the test leads and the circuit under test remove the testing leads away from the input terminals of the Meter and turn the Meter power off 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 Do not carry out the measurement when the Meter s back case and battery compartment are not closed to avoid electric shock Do not input higher than 600V between the Meter s terminals and the grounding to avoid electric shock and damages to the Meter Model UT201 202 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 be 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 and diode Replace the battery as soon as the battery indicato
19. up 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 Guang Dong Province China Postal Code 523 925 Headquarters Uni Trend Group Limited Rm901 9 F Nanyang Plaza 57 Hung To Roa Kwun Tong Kowloon Hong Kong Tel 852 2950 9168 Fax 852 2950 9303 Email info uni trend com http www uni trend com 32
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