UNI-T UT202A, Operating Manual

Page 1: ...ure Functional Buttons and auto power off Display Symbols Measurement Operation A DC Voltage Measurement B AC Voltage Measurement C Measuring Resistance D Testing Diodes E Testing for Continuity F AC Current Measurement Specifications A General Specifications B Environmental Restriction Accuracy Specifications A AC Voltage B DC Voltage C Resistance D Continuity Test E Diode Test F AC Current Maint...

Page 2: ...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 Diodes and Continuity Unpacking Inspection Open the package case and take out the Meter Check the following ...

Page 3: ...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 electrica...

Page 4: ... 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 maximum 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 ...

Page 5: ...er guards Disconnect circuit power and discharge all high voltage capacitors before testing resistance continuity and diode 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 When servicing the Meter use only the same model number or identical electrical specifications replacemen...

Page 6: ...he battery as soon as leaking appears A leaking battery will damage the Meter International Electrical Symbols AC Alternating Current DC Direct Current AC or DC Grounding Double Insulated Warning Refer to the Operating Manual Deficiency of Built In Battery Continuity Test Diode Conforms to Standards of European Union 6 UT202A Operating Manual ...

Page 7: ... 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 The tested conductor must vertically go through the jaw center figure 1 ...

Page 8: ...attery life the Meter automatically goes into a sleep mode if you do not press any button for around 10 minutes The Meter can be activated by pressing any effective button refer to The Effectiveness of Functional Buttons then returns to the display for the function selected previously 5 Buzzer The buzzer phonate go with every time button be effectual pressed When the meter will auto power off in 1...

Page 9: ...ions Below table describe which functional buttons can be used on which rotary switch positions Rotary Functional Buttons Switch SELECT MAX HOLD Positions Ω N A N A N A A 20A N A A 200A N A A 600A N A 9 UT202A Operating Manual ...

Page 10: ...lace the battery as soon as the battery indicator appears 4 The Meter is in the auto range mode in which the Meter automatically selects the range with the best resolution 5 Test of diode 6 The continuity buzzer is on 7 Maximum reading displayed 8 Data hold is active 9 Amperes amps The unit of current 10 Ω Ohm The unit of resistance kΩ Kilohm 1000 ohms MΩ Megohm 1 000 000 ohms 11 V Volts The unit ...

Page 11: ...ric shock do not attempt to measure voltages higher than 600V AC DC To measure DC voltage connect the Meter as follows 1 Insert the red test lead into the terminal and the black test lead into the COM terminal 2 Set the rotary switch to 3 Connect the test leads across with the object being measured The measured value shows on the display VΩ figure 3 ...

Page 12: ...ent see figure 4 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 To measure AC voltage connect the Meter as follows 1 Insert the red test lead into the terminal and the black test lead into the COM terminal 2 Set the rotary switch to 3 Connect the test leads across with the object being measured The measured value s...

Page 13: ...ance connect the Meter as follows 1 Insert the red test lead into the terminal and the black test lead into the COM terminal 2 Set the rotary switch to resistance measurement Ω is default or press SELECT button to select Ω measurement mode 3 Connect the test leads across with the object being measured The measured value shows on the display Note To remove the objects being tested from the circuit ...

Page 14: ...To test the diode out of a circuit connect the Meter as follows 1 Insert the red test lead into the terminal and the black test lead into the COM terminal 2 Set the rotary switch to 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 ca...

Page 15: ...he circuit under test and remove testing leads from the input terminals E Testing for Continuity see figure 7 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 Insert the red test lead into the terminal and the black test lead int...

Page 16: ...nds if the resistance of a circuit under test is less than 10Ω 4 The buzzer may or may not sounds if the resistance of a circuit under test is more than 10Ω Note 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 ...

Page 17: ...llowing 1 Set the rotary switch to 20A 200 A or 600 A 2 Press the lever to open the transformer jaws 3 Center the conductor within the transformer jaw then release the Meter slowly until the trasnformer jaw is completely closed Make sure the conductor to be tested is placed at the center of the transformer jaw otherwise it will casue deviation The Meter can only measure one conductor at a time to ...

Page 18: ...18 UT202A Operating Manual figure 8 ...

Page 19: ... cause 3 reading deviation Drop Test 1 meter drop test passed Max Jaw Size 28mm diameter Projected Max Current conductor size 26mm diameter Power 9V battery Sleep Mode can be disabled Dimensions 76mm x 208mm x 30mm Weight Approximate 260g battery included B Environmental Restrictions The Meter is suitable for indoor use Altitude Operating 2000m Storage 10000m Safety Compliances IEC 61010 CATII 600...

Page 20: ...nging Range Resolution Accuracy 2 000V 1mV 20 00V 10mV 1 2 5 200 0V 100mV 600V 1V 1 5 5 Remarks Overload protection 600V rms Input impedance 10MΩ 100pF Displays effective value of sine wave mean value response Frequency response 40Hz 1kHz B DC Voltage Auto ranging Range Resolution Accuracy 200 0mV 0 1mV 0 8 3 2 000V 1mV 20 00V 10mV 0 8 1 200 0V 100mV 600V 1V 1 3 Remarks Input impedance 10MΩ Overlo...

Page 21: ...00Vp D Continuity Test Range Resolution Accuracy Around 10Ω the buzzer beeps Remark Overload Protection 600Vp Open circuit voltage approximate 0 45V The buzzer may or may not beeps when the resistance of a circuit under test is more than 10Ω E Diode Test Range Resolution Accuracy Display approximate forward voltage drop Remarks Overload Protection 600Vp Open circuit voltage approximate 1 48V 1mV 1...

Page 22: ... Range Resolution Accuracy 20 00A 0 01A 2 0 5 200 0A 0 1A 1 5 5 600A 1A 2 0 8 Remarks Overload protection 600A rms Frequency Response 50Hz 60Hz Displays effective value of sine wave mean value response To adjust reading in accordance with effective value ...

Page 23: ...A General Service Periodically wipe the 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...

Page 24: ...ce 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 Rejoin the case bottom and the battery compartment and reinstall the screw figure 9 The content is subject to cha...

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