UNI-T UT202 Operating Manual

measurement. For high-resistance measurement(>1MΩ), it is normal taking several seconds to obtain a stable reading. In each range, the Meter has an input impedance of 10 KΩ This loading effect can cause measurement errors in high impedance circuits. If the circuit impedance is less than or equal to 10kΩ, the error is negligible (0.1 or less). When DC 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. Do not apply more than the rated voltage, as marked on the Meter, between the termials or between any terminal and grounding. If the value to be measured is unknown, use the maximum range and reduce the range step by step until a satisfactory reading is obtained. When measurement has been completed, disconnect test leads from the circuits 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 to prevent damage of the Meter. To avoid electric shock, do not carry out the measurement when the Meter,s back case and battery compartment are not closed. Do not input higher than 600V between the Meter,s terminals and the grounding to avoid electric shock and damages to the Meter. 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 deleriorate after dampened. When using the test leads, keep your fingers behind the finger guards. Disconnect circuit power and discharge all high 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 indicator appears. Whith a low battery, the Meter might produce false readings that can lead to electric shock and personal injury When servicing the Meter, use the replacement parts with the same model or identical electrical specifications. To avoid any damage to the meter or any accident, do not alter the internal circuit of the Meter randomly. 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 used for some time, replace the battery as soon as leaking appears. A leaking battery will damage the Meter. Probe assemblies to be used for MAINS measurements shall be RATED as appropriate for MEASUREMENT CATEGORY III according to IEC 61010-031 and shall have a voltage RATING of at least the voltage of the circuit to be measured. (See Figure 5) International Electrical Symbols The Meter Structure (See Figure 1) 1. Input Terminals 2. LCD Display 3. Functional Buttons 4. Rotary Switch 5. Trigger: Push/release it to open/close the clamp jaw. 6. Hand Guards: to protect user’s hand from touching the 7. Transformer Jaws: designed to pick up the AC current flowing through the conductor. It could transfer current to voltage. ( Figure 1) Rotary Switch Rotary Switch Position Function AC/DC voltage measurement. : Diode test. : Resistance measurement. Power is turned off. OFF : Continuity test. Temperature measurement (UT202 only) oC oF AC current measurement range from 0.001A to 400.0A A Functional Buttons Below table indicated for information about the functional button operations.  Press HOLD to enter and exit the Hold mode in any mode, the Meter beeps.  Press and hold HOLD button while turning on the Meter to display full icons. HOLD MAX Press MAX to start recording and updating of maximum values. SELECT Press SELECT button to switch between and . oC oF Model: UT202 Rotary Switch Positions Functional Buttons SELECT MAX HOLD V V N/A N/A N/A N/A A A 2/20A N/A 200/400A N/A oF oC(K-Type) The Effectiveness of Functional Buttons Model: UT201 Rotary Switch Positions Functional Buttons SELECT MAX HOLD V V N/A N/A N/A N/A N/A A A 2/20A N/A 200/400A N/A Display Symbols (See Figure 2) No. Symbol Description 3 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. 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 Date hold is active. 8 1 AC Indicator for AC voltage or current 2 DC Indicator for DC voltage MAX Maximum reading displayed The unit of temperature: oC: Centigrade temperature oF: Fahrenheit temperature oC oF 9 : Ohm. The unit of resistance. k : kilohm.1 x 103 or 1000 ohms. M : Megaohm. 1 x 106 or 1,000,000 ohms. ,k ,M 10 11 A Amperes (amps). The unit of current. mV, V Volts. The unit of voltage.mV: Millivolt. 1x10-3 or 0.001 volts 12 13 Indicates negative reading 14 OL The input value is too large for the selected range Measurement Operation 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. red black ( Figure 3) V A. Measuring DC Voltage (See Figure 3) B. Measuring AC Voltage (See Figure 4) red black ( Figure 4) Warning 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 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. V V The measured value shows on the display. dangerous area. AC (Alternating Current). DC (Direct Current). AC or DC. Grounding. Double Insulated. Continuity Test. Diode. Fuse. Warning. Refer to the Operating Manual. Conforms to Standards of European Union. Capacitance Test Deficiency of Built-In Battery 4007682 This symbol signify the product comply with both USA and Canada requirement. 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 missing plastic. Pay attention to the insulation around the connector. 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. Overview This Operating Manual covers information on safety and cautions. Please read the relevant information carefully and observe all the Warnings and Notes strictly. Warning To avoid electric shock or personal injury , read the “Safety Information” and carefully before using the Meter. Model UT201/202(hereafter referred to as "the Meter") is 2000-count stable, safe and reliable digital clamp multimeter. It is designed with large-scale integrated circuits and A/D converter as the core as well as the overload protection and novel structure, which make it a superb tool for electricians. The Meter can measure AC/DC voltage, AC current, resistance, temperature(℉/℃), diode, continuity and so on. In the event you find any missing or damaged part, please contact your dealer immediately. Unpacking Inspection Open the package case and take out the Meter. Check the following items carefully for any missing or damaged patr: Point Contact Temperature Probe (UT202 only) 4 1.5V Battery (AAA) 2 pcs Item 1 2 3 Description English Operating Manual Test Lead Qty 1 pc 1 pair 1 pc Safety Information This Meter complies with the standard EN 61010-1, 61010-2-032,61010-2-033,Pollution Degree 2, Measurement category. (CAT II 600V,CAT III 300V) and Double Insulation. ETL/ cETL: Conforms to UL STD 61010-1, 61010-2-032 and 61010-2-033 Certified to CSA STD C22.2 NO.61010-1, IEC STD 61010-2-032, IEC STD 61010-2-033 CAT II (MEASUREMENT CATEGORY II): Applicable to test and measuring circuits connected directly to utilization points (socket outlets and similar points) of the low-voltage MAINS installation. Examples are measurements on MAINS CIRCUITS of household appliances, portable tools and similar equipment. CAT III (MEASUREMENT CATEGORY): Applicable to test and measuring circuits connected to the distribution part of the building’s low-voltage MAINS installation. Examples are measurements on distribution boards (including secondary electricity meters), circuitbreakers, wiring, including cables, bus-bars, junction boxes, switches, socket-outlets in the fixed installation, and equipment for industrial use and some other equipment such as stationary motors with permanent connection to the fixed installation. 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. To avoid pssible electric shock or personal injury, andto avoid possible damage to the Meter or to the equipment under test, adhere to the following rules: Below tabel indicated for information about the rotary switch positions. Application around and removal from UNINSULATED HAZARDOUS LIVE conductors is permitted. Not every functional buttons can be use on every rotary switch positions.Below two tables describe on which rotary position functional buttons can be valid accordingly. 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 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. V Note 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. Note In each range, the Meter has and input impedance of 10 MΩ. This loading effect can cause measurement errors in high impedance circuits. If the circuit impedance is less than or equal to 10 KΩ, 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. 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 devices under test, disconnect circuit power and discharge all the high-voltage capacitors before measuring resistance. The resistance ranges are: 200.0Ω,2.000KΩ,20.00KΩ,200KΩ,2.000MΩ and 20.00MΩ To measure resistance,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 it, defaults at resistae(Ω) -nce mod or press SELECT button to select Ω mode. 3. Connect the test leads across with the object being measured. The measured value shows on the display.

Maximum voltage including transient overvoltage between any terminals and grounding:500V rms Display: Maximum display 1999 Auto Polarity Display Overloading : Display OL or - OL Low Battery Indication : Display Measurement Speed : Updates 3 times/second Measuremnet Deviation: When the conductor being meaured is not placed in a correct position during AC current measurement, current measurement, it will cause ±1% reading deviation. 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. 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 set not to beep. The buzzer beep 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 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 connection. The unit of diode is volt(V), displaying the forward voltage drop readings. Measuring the tested object that is already removed from the in-line circuit can help to obtain a more accutate reading. 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. If Ω reading with shorted test leads is not≤0.5Ω, check for loose test leads, wrong function selected, or enabled data hold function. The LCD displays OL indicating open-circuit or the teste resistor value is higher than the maximum range of the Meter Resistance measurement is default to auto range mode. Measuring the tested object that is already removed from the in-line circuit can help to obtain a more accu-rate reading. 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. (See Figure 8) (See Figure 7) F. Measuring Temperature G. Measuring AC Current D.Testing Diodes (See Figure 6) 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 the terminal and V the black test lead into the COM terminal. 2. Set the rotary switch to and press SELECT button to select measurement mode. red black ( Figure 6) then Specifications Maintenance This section provides basic maintenance information including battery replacement instruction. Warning A. General Service B. Replacing the Battery (See Figure 10) 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 nside the case.  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, explosive, inflammable and strong magnetic field. ( Figure 10) Screw 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. 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. F Opening Tested H Display sinewave RMS( AVG response) sinewave RMS (AVG response) RMS value (See Figure 9) 2. 3. REV.1 DATE:2015-12-04 P/N:110401105587X 3. For forward voltage drop readings on any semiconductor component, place the red test lead on the component,s anode and the black test lead on the component,s cathode. Note To avoid damages to the Meter or to the devices under test, disconnect circuit power and dicharge all the high-voltage capacitors before measuring continuity. To test for continuity,connect the Meter as follows: 1. Insert the red 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. The buzzer sounds if the resistance of a circuit under test is less than 50 Ω. 4. The buzzer may or may not sounds if the resistance of a circuit under test is between 50 Ω to 120 Ω. 5. The buzzer does not sound if the resistance of a circuit under test is higher than 120Ω. Note the connection between the testing leads and the circuit under test and remove testing leads from the input terminals. release the Meter slowly until the transformer jaw is completely closed, Make sure the conductor to be tested is placed at the center of the transfor- mer jaw, otherwise it will casue deviation. 4. The measured value shows on the display,it is a effective value of sine wave (mean value response). Note Sleep Mode To preserve battery life, the Meter automatically turns off if you do not turn the ratary switch or press any button for around 15 minutes. The Meter can be activated by turning the rotary switch or pressing any button with the following conditions: 1) When the Meter enters Sleep Mode at temperature functions of Model: UT202, the Meter cannot be activated by turning the rotary switch to AC current ranges. 2) Pressing any button must be according to“ The effectiveness of Functional Buttons” section. 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.