Model UT39E: OPERATING MANUAL TABLE OF CONTENTS TITLE Overview Unpacking Inspection Safety Information Rules For Safe Operation International Electrical Symbols The Meter Structure Functional Buttons Display Symbols Measurement Operation A. DC Voltage Measurement B. AC Voltage Measurement C. DC Current Measurement D. AC Current Measurement E. Measuring Resistance F. Measuring Diodes & Continuity G. Frequency Measurement H. Capacitance Measurement I.
Model UT39E: OPERATING MANUAL Overview Warning To avoid electric shock or personal injury, read the “Safety Information” and “Rules for Safety Operation” carefully before using the Meter. Digital Multimeter Model UT39E (hereafter referred to as “the Meter”) is a 4 1/2 digits with steady operations, fashionable structure and highly reliable hand-held 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.
Model UT39E: OPERATING MANUAL Safety Information This Meter complies with the standards IEC61010: in pollution degree 2, overvoltage category (CAT. I 1000V, CAT. II 600V) and double insulation. CAT. I: Signal level, special equipment or parts of equipment, telecommunication, electronic, etc., with smaller transient overvoltages than overvoltages CAT. II. CAT. II: Local level, appliance, PORTABLE EQUIPMENT etc., with smaller transient voltage overvoltages than CAT.
Model UT39E: OPERATING MANUAL l 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. 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.
Model UT39E: OPERATING MANUAL International Electrical Symbols Deficiency of Built-In Battery AC (Alternating Current) AC or DC Double Insulated Warning. Refer to the Operating Manual Conforms to Standards of European Union Grounding DC (Direct Current) Diode Continuity Test Fuse The Meter Structure (see figure 1) 1 1. LCD Display 2.Data Hold Button 3.Transistor Jack 4. COM Input Terminal 5. Other Input Terminals 6. mA Input Terminal 7. 20A Input Terminal 8. Capacitance Jack 9. Rotary Switch 10.
Model UT39E: OPERATING MANUAL Functional Buttons Below table indicated for information about the functional button operations Button Operation Performed POWER Turn the Meter on and off. (Yellow Button) l Press down the POWER to turn on the Meter. l Press up the POWER to turn off the Meter. l Press HOLD once to enter hold mode. (Blue Button) l Press HOLD again to exit hold mode. l In Hold mode, is displayed and the HOLD present value is shown.
Model UT39E: OPERATING MANUAL 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, l Make sure the Low Battery Display otherwise false readings may be provided. l Pay extra attention to the symbol which is located besides the input terminals of the Meter before carrying out measeurement. A.
Model UT39E: OPERATING MANUAL Note l If the value of voltage to be measured is unknown, use the maximum measurement position (1000V) and reduce the range step by step until a satisfactory reading is obtained. l The LCD displays “1” indicating the existing selected range is overloaded, it is required to select a higher range in order to obtain a correct reading. l In each range, the Meter has an input impedance of approx. 10MΩ. This loading effect can cause measurement errors in high impedance circuits.
Model UT39E: OPERATING MANUAL l The LCD displays “1” indicating the existing selected range is overloaded, it is required to select a higher range in order to obtain a correct reading. l In each range, the Meter has an input impedance of approx. 10MΩ. 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).
Model UT39E: OPERATING MANUAL To measure current, do the following: 1. Turn off power to the circuit. Discharge all high-voltage capacitors. 2. Insert the red test lead into the mA or 20A terminal and the black test lead into the COM terminal. When measuring current at 200mA below, insert the red test lead into mA terminal while measuring current 200mA or above, insert the red test lead into 20A terminal 3. Set the rotary switch to an appropriate measurement position in A range. 4.
Model UT39E: OPERATING MANUAL To measure current, do the following: 1. Turn off power to the circuit. Discharge all high-voltage capacitors. 2. Insert the red test lead into the mA or 20A terminal and the black test lead into the COM terminal. When measuring current at 200mA below, insert the red test lead into mA terminal while measuring current 200mA or above, insert the red test lead into 20A terminal 3. Set the rotary switch to an appropriate measurement position in A range. 4.
Model UT39E: OPERATING MANUAL E. Measuring Resistance (see figure 5) Black Red (figure 5) 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. Insert the red test lead into the VΩ terminal and the black test lead into the COM terminal. 2. Set the rotary switch to an appropriate measurement position in Ω range. 3.
Model UT39E: OPERATING MANUAL F. Measuring Diodes & Continuity 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 3V rms in AC to avoid personal dangerous. Testing Diodes Use the diode test to check diodes, transistors, and other semiconductor devices.
Model UT39E: OPERATING MANUAL Testing for Continuity To test for continuity, connect the Meter as below: 1. Insert the red test lead into VΩ 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. 4. The buzzer sounds continuously if the resistance of a circuit under test is<70Ω, . The LCD displays the resistance value of a circuit under test.
Model UT39E: OPERATING MANUAL To measure frequency, connect the Meter as follows: 1. Insert the red test lead into the VΩ terminal and the black test lead into the COM terminal. 2. Set the rotary switch to an appropriate measurement position in kHz range. 3. Connect the test leads across with the object being measured. The measured value shows on the display. Note l When Hz measurement has been completed, disconnect the connection between the testing leads and the circuit under test. H.
Model UT39E: OPERATING MANUAL Note l For testing the capacitor with polarity, connect the red test lead to anode & black test lead to cathode l When the tested capacitor is shorted or the value is overloaded, the LCD display “1”. l To minimize the measurement error caused by the distributed capacitor, the connection should be as short as possible. l It is normal to take a while for zeroing when changing over the measurement range. This process will not affect the accuracy of the final readings obtained. I.
Model UT39E: 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. At that time, the Meter consumes around 10µA current. The Meter can be activated by pressing the POWER two times. General Specifications l Maximum voltage between any Terminals and Grounding: 1000VDC or 750VAC. l Fused Protection for mA Input Terminal: 0.315A, 250V fast type,φ 5 x 20mm.
Model UT39E: OPERATING MANUAL Accuracy Specifications Accuracy: (a% reading + b digits), guarantee for 1 year. Operating temperature: 230C 50C. Relative humidity:<75%. Temperature coefficient: 0.1 x (specified accuracy) / 10C A. DC Voltage Range Resolution Accuracy Overload Protection 200mV 0.01mV (0.05%+3) 250V DC or AC rms. 2V 0.0001V 20V 0.001V 1000V DC or (0.1%+3) 200V 0.01V 750V rms. 1000V 0.1V (0.15%+5) Remark: l Input impedance: 10MΩ. B. AC Voltage Range Resolution Accuracy Overload Protection 2V 0.
Model UT39E: OPERATING MANUAL Remark: l At 20A Range: For continuous measurement 10 seconds and interval not less than 15 minutes l Measurement voltage drop: Full range at 200mV. D. AC Current Range Resolution 2mA 0.0001mA 200mA 0.01mA 20A 0.001A Accuracy Overload Protection (0.8%+10) 0.315A. 250V fast (1.2%+10) type fuse, φ5 x 20mm Un-Fused (2.5%+10) Remark: l At 20A Range: For continuous measurement 10 seconds and interval not less than 15 minutes l Measurement voltage drop: Full range at 200mV.
Model UT39E: OPERATING MANUAL F. Diodes and Continuity Test Function Range Resolution Input Protection Remark Open circuit Diode 0.1mV voltage approx.2.8V 250V rms Continuity 0.1Ω Approx. <70Ω buzzer beeps Buzzer continuously G. Frequency Range Resolution Accuracy Overload Protection 2kHz 0.0001kHz (2%+5) 250V rms 20kHz 0.001kHz (1.5%+5) Remark: l Input Sensitivity: 200mV. l When the input voltage is 30V rms, no guaranteed accuracy. H.
Model UT39E: OPERATING MANUAL 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. A. General Service l Periodically wipe the case with damp cloth and mild detergent. Do not use chemical solvent.
Model UT39E: OPERATING MANUAL To replace battery: 1. Disconnect the connection between the testing leads and the circuit under test, and remove the testing leads away from the input terminals of the Meter. 2. Press the Meter power off 3. Remove the screw from the battery compartment, and then take out the battery door from the battery compartment. 4. Remove the battery from the battery compartment. 5. Replace the battery with a new 9V battery (NEDA 1604 or 6F22 or 006P). 6.
Model UT39E: OPERATING MANUAL 7. Install ONLY replacement fuses with the identical type and specification as follows and make sure the fuse is fixed firmly in the bracket. 0.315A. 250V fast type fuse, φ5 x 20mm. 8. Rejoin the case bottom and the case top, and install the screw. 9. Rejoin the battery door from the battery compartment, and install the screw 10.Rejoin the holster and the Meter. Replacement of fuses is seldom required. Burning of a fuse always results from the improper operation.
Model UT39E: 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.
