User Manual
Contents
1. 3 2 3 DCA Range Accuracy Resolution 200uA 0 OluA 2mA 0 5 4 0 luA 20mA luA 200mA 0 8 6 10uA 20A 2 0 15 1mA Max measuring volt drop 200mV Max input current 20A less thanl0 seconds Overload protection 0 2A 250V fast blow fuse 20A range without fuse 3 2 4 ACA Range Accuracy Resolution 200mA 1 5 25 10uA 20A 2 5 35 1mA Max measuring volt drop 200mV Max input current 20A less than 10 seconds Overload protection 0 2A 250V with fuse 20A range without fuse Frequency response 40 200Hz Displaying sine wave RMS mean value response 3 2 5 RESISTANCE Q Range Accuracy Resolution 200 2 0 2 10 0 012 2kQ 0 12 e 0 2 5 a 200k Q 102 2MQ 100 Q 200M Q 5 reading 10 00 10 10k Q Open circuit voltage less than 3V Overload protection 250DCV or ACV peak value Note a In 2002 range should make the test leads short and measure the resistance of the wire then subtracts from the actual measuring value b In 200MQ range should make the test leads short LDC will display 10 00MQ which is normal situation subtracts it from the real measurement 3 2 6 CAPACITANCE Range Accuracy esolutio 2nF 0 IpF 20nF pF 3 5 10 200nF OpF 2uF 00pF 200uF 3 8 20 OnF esting frequency 400Hz Overload protection 362. COM terminal and the red one to mA terminal Max 200mA or the red test lead to 20A terminal max 20A 4 4 2 Set the range knob to a proper DCA current range then connect the meter to the measured circuit the measured current value and the current polarity which the red test lead connect will be displayed on LCD NOTE If the range under measured is unknown beforehand should set the range knob to the highest range then switch to a proper range according to the displaying value 2 If LCD displays 1 it means over range the range knob must be set to a higher range 3 The max input current is 200mA or 20A subject to the position where the red test lead insert large current may blow the fuse Be careful especially at 20A range because there is no fuse protection at this range large current may heat the circuit even damage the meter 4 5 AC current measurement 4 5 1 Apply the black test lead to COM terminal and the red one to mA terminal max 200mA or the red test lead to 20A terminal max 20A 4 5 2 Set the range knob to a proper AC current range then connect the meter to the circuit under measured NOTE 1 If the current range under measure is unknown beforehand should set the range knob to the highest range then switch to the proper range according to the displaying value 2 If LCD displays 1 it means over range must set the range knob to a highe
3. DCV or ACV peak value 3 2 7 FREQUENCY Range Accuracy Resolutio 200kHz 3 15 10Hz Input sensitivity 1V RMS Overload protection 250V DC or AC peak value less than 10sec 3 2 8 DIODE AND CONTINUITY TEST RANGE DISPLAYING VALUE TEST CONDITION Forward DC current is Diode forward volt drop approx ImA backward voltage is approx 3V gt Buzzer rings the impedance between the two testing points is less than 30 10 Q Overload protection 250DCV or ACV peak value Warning do not input any voltage value at this range for safety 3 2 9 hFE Open voltage is approx 3V Range Scope Testing condition a Base DC current is approx hFE NPN or PNP 071000 10uA Vee is approx 3V 4 OPERATION 4 1 Front panel LCD display the measured value Function key 1 Power switch turn on or off the power 2 HOLD key press the key down the measured value will be hold and HOLD signal appears press it down again HOLD the HOLD mode Backlight hFE testing terminal for measuring transistor hFE Knob switch for changing function and range Terminal for capacitance Terminal for Voltage resistance frequency and GND testing Battery case 4 2 DCV measurement 4 2 1 Apply the black test leads to COM terminal and the red one to V Q Hz terminal 4 2 2 Switch the knob to a proper DCV range then connect th
4. and unstable 4 Please do not measure the capacitance on line 5 Before measuring should release the capacitor completely to avoid damage 4 8 Frequency measurement 4 8 1 Apply the test leads or shield cable to COM and V Q Hz terminal 4 8 2 Switch the range knob to frequency range connect the test leads across to the signal source or the measured load NOTE 1 When input is over 10Vrms reading is possible but maybe over range 2 It s better to use shielding cable on noisy condition when measuring small signal 3 Be careful when measuring high volt circuit 4 Do not input a voltage over 250DCV or AC peak value to avoid damage the meter 4 9 Transistor hFE 4 9 1 Set the range to hFE range 4 9 2 Select NPN or PNP insert separately emitter base and collector to proper terminal 4 10 Diode and continuity test 4 10 1 Apply the black test lead to COM terminal and the red one to V Q Hz terminal the polarity of the red test lead is 4 10 2 Set the range knob to gt connect the test leads to the diode under measured and the reading is close to the value of diode forward voltage drop 4 10 3 Backward measuring the red test connect to diode cathode polarity the black test leads to diode positive polarity the LCD display OL 4 10 4 The complete diode testing include forward and backward measurement if the result isn t meet the above it means the diode is bad 4 10 5 Conn
5. DIGITAL MULTIMETER OPERATION MANUAL 1 GENERAL his digital multimeter is a steady performance battery driven 4 1 2 digital multimeter It uses the LCD with 28mm high figure to make the reading clear and make operation more convenient he digital multimeter has the function of measuring DCV ACV DCA ACA resistance capacitance transistor and diode and continuity performance test etc The meter can provide functions including unit symbol display data holding It adopts double integral A D converter as its core It is an ideal tool for labs factories and radio technology 2 SAFETY The instrument is designed according to IEC1010 standard safety standard issued by International Electro technical Committee Please read the safety note before operation 2 1 Do not input a limited voltage higher than DC 1000V or AC 750V when measuring ranges 2 2 The voltage below 36V is safety To avoid electric shock check whether the test leads are connected correctly whether the insulation is good when measuring over 36DCV or 25ACV 2 3 The test leads should be removed from the testing point when changing function and range 2 4 Choose correct function and range to avoid wrong operation 2 5 Do not input current higher than 20A when measuring current 2 6 Specification of safety signal Ly existing dangerous volt a GND E dual insulation fi operator must refer to the manual tf low battery indication 3 SPECIF
6. ICATION 3 1 GENERAL 3 1 1 Displaying LCD display 3 1 2 Max displaying 19999 4 1 2 auto polarity display 3 1 3 Measuring method dual slope A D transfer 3 1 4 Sampling rate approx 3 times sec or 1 displayed in the highest digit 3 1 6 Low battery display E displays 3 1 7 Operation 0 40 C relative humidity lt 80 R H 3 1 8 power 9V battery NEDA1604 6F22 or equivalent 3 1 9 Dimension 185mmX93mmX35 mm 3 1 10 Weight approx 290g including battery 3 1 11 Accessories user manual test leads holster gift box and 1 9V battery 3 2 TECHNICAL SPECIFICATION 3 2 1 Accuracy a X reading digits at 23 5 C lt 75 R H one year guarantee from production time q 3 1 5 Over range display 3 2 2 DCV Range Accuracy Resolution 200mV 0 05 3 10uV 2V 100uV 20V mV 200V 10mV 1000V 0 1 5 100mV Input impedance 10M at all ranges Over range protection 250 DCV or AC peak value at 200mV range 1000 DCV or DC peak value at other range 3 2 2 AC Range Accuracy Resolution 2V 100uV 20V 0 8 25 1mV 200V 10mV 750V 1 0 25 100mV Input impedance 10M at all ranges Over range protection 1000 DCV or DC peak value at other range Frequency response below 200V 40 400Hz 750Vrange 40 200Hz Displaying sine wave RMS mean value response
7. e test leads cross the measured circuit the voltage and polarity of the point which connected signal disappears and out of with the red test lead will be displayed NOTE 1 If the voltage under measured is unclear beforehand should set the range knob to the highest range then switch to a proper range according to the displaying value 2 The remained digits do not affect on measuring accuracy when we haven t measure the low voltage If LCD displays 1 it means over range the range knob must be switched to a higher range 2 Do not input a voltage over 1000V or the meter might be damaged 3 Be careful when measuring high voltage circuit 4 3 ACV measurement 4 3 1 Apply the black test leads to COM terminal and the red one to V Q Hz terminal 4 3 2 Set the range knob to a proper ACV range and then connect the test leads cross to the measured circuit NOTE 1 If the range under measured is unclear beforehand should set the range knob to the highest range then switch to a proper range according to displaying value 2 The remained digits do not affect on measuring accuracy when we haven t measure the low voltage If LCD displays 1 it means over range should set the range knob to a higher range 3 Do not input a voltage over 750Vrms or the meter might be damaged 4 Be careful when measuring high voltage circuit 4 4 DC current measurement 4 4 1 Apply the black test leads to
8. ect the test leads to two points of circuit under measured if the built in buzzer sounds the resistance between two points is less than approx 30410 Q NOTE Do not input voltage at range to avoid damage the meter 4 11 DATA HOLD PRESS HOLD key the current data will be hold on LCD press it again this function will cancelled 4 12 Auto power off When the meter stopped to use for 20 10 minutes later it will be auto power off and inter the state of dormancy Press POWER key for twice it will turn on again 4 13 Backlight Press B L key the backlight will light it will go out after 10 sec If you need it press it again 5 MAINTENANCE Do not try to modify the electric circuit 5 1 Don t input the voltage value higher than DC 1000V or AC 750V 5 2 Don t measuring the voltage at resistance rage 5 3 Don t use the meter when the battery isn t install or the back case isn t firm 5 4 When replacing fuse please take away the test leads from the measuring point and power off at first 5 5 Keep the meter away from water dust and shock 5 6 Do not store and operate the meter under the condition of high temperature high humidity combustible explosive and strong magnetic place 5 7 Wipe the case with a damp cloth and detergent do not use abrasives and alcohol 5 8 If do not operate for a long time should take out the battery to avoid leakage 5 9 When Et
9. r range 3 The max input current is 200mA or 20A subject to the position where the red test lead insert large current might blow the fuse be careful especially at 20A range because there is no fuse protection at this range large current may heat the circuit even damage the meter 4 6 Resistance measurement 4 6 1 Apply the black test lead to COM terminal and the red one to V Q Hz terminal 4 6 2 Set the range knob to a proper resistance range connect the test leads across the resistance under measured NOTE 1 If the resistance value is over the selected range value 1 displays thus should set to a higher range When measuring value is over IM2 the reading needs a few seconds to be stable It s normal for high resistance measuring 2 When input terminal is open circuit overload displays 3 Before measuring in line resistance be sure that power is off and all capacitance are released 4 If big error appears perhaps it was affected by other elements or there existed voltage on the resistance 5 Do not input voltage at this range 4 7 Capacitance measurement Set the knob to proper capacitance range and insert the capacitor under tested NOTE 1 If 1 displays it means over range should set to a higher range 2 The remained digits do not affect on measuring accuracy before measuring 3 If creeps seriously or the capacitor is breakdown when measuring large capacitance some digits are displayed
10. symbol displays should replace the battery following the steps 5 9 1 see picture 2 move holster at first 5 9 2 Unlock the button and remove the battery case 5 9 3 Take out the old battery and replace the new one It s better to use alkaline battery for longer life 5 9 4 fit on battery case and bolt 5 9 5 see the picture to fit on the holster 5 10 fuse change When replacing fuse please change another same type and specification fuse 6 If the meter does not work properly check the meter as following CONDITIONS WAY TO SOLVE E The power is not turned on NO DISPLAYING E HOLD key E Replace battery symbol displays E Replace battery NO CURRENT INPUT a Replace fuse BIG ERROR a Replace battery B The specifications are subject to change without notice a The content of this manual is regarded as correct error or omits Pls contact with factory E We hereby will not be responsible for the accident and damage caused by improper operation The function stated for this User Manual cannot be the reason of special usage
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