DIGITAL MULTIMETER USER'S MANUAL
Contents
1. Measuring leads must be in good condition 1 2 DURING USE X Never exceed the protection limit values indicated specifications for each range of measurement When the meter is linked to measurement circuit do not touch unused terminals When the value scale to be measured is unknown beforehand set the range selector at the highest position X Before rotating the range selector to change functions disconnect test leads from the circuit under 1 test X When carrying out measurements on TV or switching power circuits always remember that there may be high amplitude voltages pulses at test points which can damage the meter gt lt Never perform resistance measurements on live circuits Always be careful when working with voltages above 60V dc or 30V ac rms Keep fingers behind the probe barriers while measuring 1 3 SYMBOLS Important safety information refer to the operating manual Dangerous voltage present L Earth ground 0 Double insulation Protection class II 1 4 MAINTENANCE X Before opening the meter always disconnect test leads from all sources of electric current X For continue protection against fire replace fuse only with the specified voltage and current ratings F1 F 300mA 250V F2 10A 250V X f any faults or abnormalities are observed the meter can not be used any more and it has to be checked out 12 X Never use the meter unless the back cover is in2. place and fastened fully X To clean the meter use a damp cloth and mild detergent only do not use abrasives or solvents it 2 DESCRIPTION This meter is portable professional measuring instrument with 3 1 2 digit LCD capable of performing functions DC and AC voltage measurement DC and AC current measurement Resistance measurement Capacitance measurement Diode test Transistor test Audible continuity test Frequency measurement NAMES OF COMPONENTS 1 Range control button 2 Data hold button 3 LCD display 4 AC DC current or selecting button 5 Socket for transistor test 6 Rotary switch power switch 7 VIQIF input jack 8 COM input jack Bs 9 mA Cx input jack 10 10A input jack 2 1 RANGE CONTROL BUTTON Range for AC DC voltage AC DC current uA and mA only resistance and frequency measuring can be selected manually or handled by autoranging Push this button as following to shoose range control mode and desired ranges Power on or function changing gt Auto ranging Push button once R H displayed Push bullon for over 3 sec Manual ranging i Push pullon for less than 1 sec Range cnanged 2 2 DATA HOLD BUTTON When this button is pushed the display will show the last reading and D H symbol will appear until pushing it again Data holding will be canceled automatically when the
3. DIGITAL MULTIMETER USER S MANUAL CONTENTS 1 SAFETY INFORMATION sulle e LLLI bu oda 1 2 un aepo 3 3 OPERATING INSTRUCTION 6 3 1 Measuring 6 3 2 Measuring 6 3 3 Measuring frequency 3 4 Measuring resistance 3 5 Measuring capacitance 7 3 6 Testing diode amp continuity 8 3 7 Testing 9 4 SPEGCIFEICATIONS 5 tte da 9 5 ACCESSORIES ili ae ups 13 6 BATTERY amp FUSE REPLACEMENT 14 1 SAFETY INFORMATION This multimeter has been designed according to 1010 concerning electronic measuring instruments with an overvoltage category CAT II and pollution 2 Follow all safety and operating instructions to ensure that the meter is used safely and is kept in good operating condition 1 1 PRELIMINARY X When using this meter the user must observe all normal safety rules concerning Protection against the dangers of electrical current Protection of the meter against misuse Full compliance with safety standards can be guaranteed only if used with test leads supplied If necessary they must be replaced with the same model or same electronic ratings
4. Maximum open circuit voltage 1 3V 12 5 ACCESSORIES 5 1 SUPPLIED WITH THE MULTIMETER Test leads Electric Rating 1500V 10A Battery 9V NEDA 1604 or 6F22 Operating Manual Holster Capacitance Testing Adapter 5 2 HOW TO USE THE HOLSTER 1 couple 1 pcs 1 pcs 1 pcs 1 pcs The holster is used to protest the meter and to make the measurement more comfortable it comes with tow stands installed together The figure shows how to use the holster to A Support the meter with a standard angle B Support the meter with a small angle using the little stand C Hang the meter on the wall using the little stand Take the little stand off from the back side of the large and insert it into holes located upper on the holster D hold test leads 13 X 6 BATTERY amp FUSE REPLACEMENT If the sign appears on the LCD display it indicates that battery should be replaced Remove screws on the back cover and open the case Replace the exhausted battery with a new one Fuse rarely need replacement and blow almost always as a result of the operators error Open the case as mentioned above and then take the PCB out from the front cover Replace the blown fuse with same ratings 14 A WARNING Before attempting to open the case be sure that test leads have been disconnected from measurement circuits to avoid electric shock hazard For protection against f
5. curacy 3 26V 1 32 6V 10mV Vm 0 8 of rdg 3 digit 326V 100mV 750V 1V Input Impedance 10MQ Frequency range 40 to 400Hz 40 to 200Hz for 3 26V range Response Average calibrated in rms of sine wave 4 4 AC CURRENT Range Resolution Accuracy Burden voltage 326uA 0 1uA 0 5mV uA 3260uA 1uA 1 5 5 32 6 104 8 0mV mA 326mA 0 1mA 10A 10mA 3 0 7 0 02V A Overload protection F 300mA fuse for A and mA ranges F 10A fuse for A range Frequency Range 40Hz to 400Hz Response Average calibrated in rms of sine wave 4 5 DC CURRENT Range Resolution Accuracy Burden voltage 326uA 0 1uA 1 2 0 5mV uA 32601A 1uA 32 6mA 104A 8 0mV mA 11 326 0 1mA 10A 10mA 2 0 5 0 02V A Overload protection F 300mA fuse for A and mA ranges F 10A fuse for A range 4 6 CAPACITANCE Range Resolution Accuracy elt DAME 4 0 of rdg 5 digits 32 6uF 10nF 4 7 FREQUENCY Range Resolution Accuracy 32 6KHz 10Hz 4 0 of rdg 5 digits 150kHz 100Hz 2 5 of rdg 5 digits Sensitivity 200mV rms up to 50kHz 1V rms for 50KHz to 150KHz 4 8 RESISTANCE Range Resolution Accuracy 3260 0 10 0 8 rdg 3 digits 3 26KO 10 m Li 0 8 rdg 1 digits 3 26 0 10000 32 6MQ 10KQ 1 2 rdg 2 digits
6. e and locate Emitter Base and Collector lead Insert leads of the transistor to be tested into proper holes of the testing socket on the front panel 3 LCD display will show the approximate hFE value at the test condition of base current 10uA and Vce 3 2V 4 SPECIFICATIONS Accuracy is specified for a period of one year after calibration and at 18 C to 28 C 64 F to 82 F with relative humidity to 80 Accuracy specifications are given as of reading number of least significant digits 4 1 GENERAL MAXIMUM VOLTAGE BETWEEN TERMINALS AND EARTH GROUND 1000V DC or 700 rms AC sine 202 FUSE PROTECTION mA F 300mA 250V A F 10A 250V POWER SUPPLY 9V battery NEDA 1604 or 6F22 DISPLAY LCD 3260 counts MAX updates 2 3 sec MEASURING METHOD Dual slope integration A D converter OVERRANGE INDICATION 4 figure only on the display POLARITY INDICATION displayed for negative polarity LOW BATTERY INDICATION displayed OPERATING TEMPERATURE 0 C to 40 C 32 F to 104 F STORAGE TEMPERATURE 10 C to 50 C 14 F to 122 F DIMENSION 91x189x31 5mm WEIGHT 310g including battery 4 2 DC VOLTAGE Range Resolution Accuracy 326mV 0 1mV 0 5 of rdg 2 digit 3 26V 1 32 6V 10mV 0 3 of rdg 2 digit 326V 100mV 1000V 1V 0 5 of rdg 2 digit Input impedance 10MQ more than 100MQ at 326mV range 10 4 3 AC VOLTAGE Range Resolution Ac
7. function switch is rotated 2 3 AC DC CURRENT OR gt SELECTING Button Push this button to select AC or DC current measuring function when the function switch is set at uA mA A positions Push this button to select gt measuring function when the function switch is set at positions 2 4 INPUT JACKS This meter has four input jacks that are protected against overload to the limits During use connect the black test lead to the COM jack and red test lead as shown below Function a Input limits DCV ACV V Q F 1000V dc or 750V rms ac kHz V Q F 250V dc or rms ac on V Q F 250Vdc or rms ac mA Cx 300mA dc or rms ac nF uF mA Cx 300mA fuse protected A A 10A dc or rms ac and A ranges are protected by fuses 3 OPERATING INSTRUCTION 3 1 MEASURING VOLTAGE 1 Connect the black test lead to the COM jack and the red test lead to the jack 2 Set the rotary switch at the desired Viz or V range position and connect test leads across the source or load under measurement 3 Read LCD display The polarity of the red connection wil be indicated when making a dc voltage measurement 3 2 MEASURING CURRENT 1 Connect the black test lead to the COM jack and the red test lead to the mA Cx jack for a maximum of 300mA For a maximum of 10A move the red lead to the A jack 2 Set the rotary switch at uA mA and A range position to be used and push butt
8. ire replace fuse only with specified ratings F1 200mA 250V quick acting 15
9. n switch at nF or uF position to be used 3 Connect test leads across the capacitor under zT measurement and be sure that the polarity of connection is observed NOTE 1 When checking in circuil capacitance be sure that the circuit has all power removed and all capacitor are fully discharged 2 range control mode capacitance measurement is manual ranging and only two ranges 326nF 32 6UF are provided 3 If range control button is used in this function measuring decimal points may be at incorrect positions 4 At the nF range when the capacitor to be measured is not connected to test leads the LCD may not read zero but a few counts These counts have to be subtracted from measuring results 3 6 TESTING DIODE amp CONTINUITY 1 Connect the black test lead to the COM jack and the red test lead to the V Q F jack NOTE The polarity of red lead connection is positive 2 Set the rotary switch at o position and push the o 4 button to select continuity or diode test mode 3 In continuity testing if continuity exists i e resistance less than about 500 built in buzzer will sound 4 If diode test mode is selected connect the red and black leads to the anode and cathode of the diode under test The forward voltage drop of this diode in V Ba will be displayed 3 7 TESTING TRANSISTOR 1 Set the rotary switch at hFE position 2 Identify whether the transistor is NPN or PNP typ
10. on to select DCA or ACA measuring mode 3 Connect test leads in series with the load in which the current is to be measured 4 Read LCD display The polarity of read connection will be indicated when making a DC measurement 3 3 MEASURING FREQUENCY 1 Connect the black test leads to the COM jack and the red test lead to the jack 2 Set the rotary switch at KHz position and connect test leads across the source or load under measurement 6 NOTE The input voltage should be between 200 and 10V rms ac If the voltage is more than 10V rms reading may be out of the accuracy range 3 4 MEASURING RESISTANCE 1 Connect the black test lead to the COM jack and the red test lead to the jack NOTE The polarity of red lead connection is positive 2 Set the rotary switch at desired Q range position and connect test leads across the resistance under measurement NOTE 1 For resistance above 3 26MQ the meter may take a few seconds to stabilize reading 2 When the input is not connected i e at open circuit the figure OL will be displayed for the overrange condition 3 When checking in circuit resistance be sure the circuit under test has all power removed and all capacitors are full discharged 3 5 MEASURING CAPACITANCE 1 Connect the black test lead to the COM jack and the red test lead to the mA Cx jack NOTE The polarity of the red lead is positive 2 Set the functio
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