Model UT10A: OPERATING MANUAL Table of Contents (1) Table of Contents Title Overview Unpacking Inspection Safety Information Rules For Safe Operation International Electrical Symbols The Meter Structure Functional Buttons Measurement Operation A. DC Voltage Measurement B. AC Voltage Measurement C. Measuring Resistance D. Frequency and Duty Cycle Measurement E. Measuring Diodes & Continuity F.
Model UT10A: OPERATING MANUAL Table of Contents (2) 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.
Model UT10A: OPERATING MANUAL Overview Overview Warning To avoid electric shock or personal injury, 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.
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 1 2 3 4 Description English Operating Manual Built-In Test Lead Vinyl Holder 3V Button Battery (CR2032) Qty 1 piece 1 pair 1 piece 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 (CAT. 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 in this operating manual, otherwise the protection provided by the Meter may be impaired.
Model UT10A: OPERATING MANUAL Rules For Safe Operation (1) 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: l 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.
Model UT10A: OPERATING MANUAL Rules For Safe Operation (2) l 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. l Use the proper terminals, function, and range for your measurements. l 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.
Model UT10A: OPERATING MANUAL Rules For Safe Operation (3) l When servicing the Meter, use only the same model number or identical electrical specifications replacement parts. l The internal circuit of the Meter shall not be altered at will to avoid damage of the Meter and any accident. l 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.
Model UT10A: OPERATING MANUAL International Electrical Symbols International Electrical Symbols Deficiency of Built-In Battery AC (Alternating Current) Capacitance Double Insulated Warning.
Model UT10A: OPERATING MANUAL The Meter Structure The Meter Structure (see figure 1) 1 1. LCD Display 2. SELECT Button 3. RELATIVE Mode Button 4. DATA HOLD Button 5. Hz/DUTY Button 6. Rotary Switch 7. Black Test Lead 8.
Model UT10A: OPERATING MANUAL Functional Buttons Functional Buttons Below table indicated for information about the functional button operations Button SELECT RELATIVE DATA HOLD Hz/DUTY Operation Performed Press SELECT to switch between resistance, capacitance, continuity buzzer and diode measurement modes; the Meter beeps. Resistance measurement is default. Press RELATIVE to enter and exit the REL mode in any measuring mode except in frequency/duty cycle; the Meter beeps.
Model UT10A: OPERATING MANUAL Measurement Operation(1) Measurement Operation l Make sure the Sleep Mode is not on if you found there is no display on the LCD after turning on the Meter. is not on, otherwise false readings may l Make sure the Low Battery Display be provided. symbol which is located besides the input terminals l Pay extra attention to the of the Meter before carrying out measeurement.
Model UT10A: OPERATING MANUAL Measurement Operation(2) A.
Model UT10A: OPERATING MANUAL Measurement Operation (3) 3 To measure DC voltage, connect the Meter as follows: 1. Set the rotary switch to DCV 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 l The LCD displays the negative reading when the test lead connection is reversed.
Model UT10A: OPERATING MANUAL Measurement Operation (4) B. AC Voltage Measurement (see figure 2 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 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 range. 2. Connect the test leads across with the object being measured.
Model UT10A: OPERATING MANUAL Measurement Operation (5) C.
Model UT10A: OPERATING MANUAL Measurement Operation(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 measuring resistance. To measure resistance, connect the Meter as follows: 1. Set the rotary switch to range. Ω 2. Connect the test leads across with the object being measured. The measured value shows on the display. Note l The test leads can add 0.1Ω to 0.3Ω of error to the resistance measurement.
Model UT10A: OPERATING MANUAL Measurement Operation(7) l For high resistance (>1MΩ), it is normal taking several seconds to obtain a stable reading. l When there is no input, for example in open circuit condition, the Meter displays “OL”. l When resistance measurement has been completed, disconnect the connection between the testing leads and the circuit under test.
Model UT10A: OPERATING MANUAL Measurement Operation(8) D. Frequency and Duty Cycle Measurement (see figure 3 with dotted line) 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 the Meter as follows: 1.
Model UT10A: OPERATING MANUAL Measurement Operation(9) E. Measuring Diodes & 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.
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 component’s cathode. The LCD displays the nearest value of diode forward voltage drop. Note l In a circuit, a good diode should still produce a forward voltage drop reading of 0.5V to 0.
Model UT10A: OPERATING MANUAL Measurement Operation(11) Testing for Continuity To test for continuity, connect the Meter as below: 1. Set the rotary switch to Ω 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 70Ω. The LCD displays the resistance value of a circuit under test simultaneous.
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 equipment under test, disconnect the tested circuit power when measuring on line capacitors and discharge all highvoltage 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.
Model UT10A: OPERATING MANUAL Measurement Operation(13) Note l For testing the capacitor with polarity, connect the red test lead to anode & black test lead to cathode l For measuring capacitance higher than 10µF, it is normal taking several seconds to obtain a reading. l When capacitance measurement has been completed, disconnect the connection between the testing leads and the circuit under test.
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 pressing SELECT button, the Sleep Mode feature will be disabled.
Model UT10A: OPERATING MANUAL General Specifications General Specifications l l l l l l l l l l l l l l 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 0 C~40 0 C(32 0 F~104 0 F), Relative Humidity: 75 Storage Temperature: -100C~500C( 140F~1220F). Altitude: Operating: 2000m; Storage: 10000m. Battery Type: 3V button battery (CR2032).
Model UT10A: OPERATING MANUAL Accuracy Specifications(1) Accuracy Specifications Accuracy: (a% reading + b digits), guarantee for 1 year. Operating temperature: 230C 50C. Relative humidity: <75%. Temperature coefficient: 0.
Model UT10A: OPERATING MANUAL Accuracy Specifications(2) A. DC Voltage Range Resolution Accuracy Overload Protection Remarks (0.8%+3) 0.1mV 300V DC 1mV Input Impedance: 10MΩ 300V AC. (0.
Model UT10A: OPERATING MANUAL Accuracy Specifications(3) B. AC Voltage Range Resolution Accuracy Overload Protection 4V 40V 300V 1mV 10mV 100mV (1.2%+3) 300V DC 300V AC. 29 Remarks l Input Impedance: 10MΩ. l Frequency response: 40Hz~400Hz. l Display effective value of sine wave (mean value response).
Model UT10A: OPERATING MANUAL Accuracy Specifications(4) C. Resistance Test Range Resolution Accuracy Overload Protection (1.2%+2) 400Ω 0.1Ω 4kΩ 40kΩ 400kΩ 4MΩ 40MΩ 1Ω 10Ω 100Ω 1kΩ 10kΩ (1%+2) 250V AC (1.2%+2) (1.5%+2) 30 Remarks Open circuit voltage: approx. 0.
Model UT10A: OPERATING MANUAL Accuracy Specifications(5) D. Frequency Range 99.99Hz 999.9Hz 9.999kHz 99.99kHz Resolution Accuracy Overload Protection 0.01Hz 0.1Hz 0.001kHz 0.01kHz (0.5%+3) 250V AC 31 Remarks l The inputted voltage is sine wave l When 10Hz ~10kHz: 1V rms l When 10kHz~100kHz: 30V rms.
Model UT10A: OPERATING MANUAL Accuracy Specifications(6) E. Duty Cycle Range 0.1% ~ 99.9% Resolution Overload Protection 0.1% Remarks or l Press Hz/DUTY button at ACV DCV range to select Duty Cycle measurement mode. l Reading is only for reference, 250V AC F. Diodes and Continuity Test Function Range Resolution Diode 1mV Continuity Buzzer 0.1Ω Input Protection Remarks Open circuit voltage approx.1.5V 250V AC 32 l Open circuit voltage approx. 0.45V, f=2.7kHz l Approx.
Model UT10A: OPERATING MANUAL Accuracy Specifications(7) G. Capacitance Range Resolution Accuracy Overload Protection 4nF 40nF 400nF 4µF 40µF 200µF 0.001nF 0.01nF 0.1nF 0.001µF 0.01µF 0.1µF Remarks Reading is only for reference (4%+3) 250V AC l Open circuit voltage: around 0.45V l Measuring under Relative mode.
Model UT10A: OPERATING MANUAL Maintenance(1) Maintenance This section provides basic maintenance information including battery and fuse replacement instruction. 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.
Model UT10A: OPERATING MANUAL Maintenance(2) A. General Service l Periodically wipe the case with damp cloth and mild detergent. Do not use chemical solvent. l To clean the terminals with cotton bar with detergent, as dirt or moisture in the terminals can affect readings. l Turn the Meter OFF when it is not in use and take out the battery when not using for a long time.
Model UT10A: OPERATING MANUAL Maintenance(3) B.
Model UT10A: OPERATING MANUAL Maintenance(4) 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. 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.
Model UT10A: OPERATING MANUAL C 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.
