User Manual
Contents
1. Z aa Z a H 040 a H an Q Z aa aa 4 1 2 Digits Bench Digital Multimeter Operation Manual V2 0 C 1 GENERAL This bench type digital multimeter is a steady performance 4 1 2 digital multimeter It uses the LCD with 23mm high figure to make the reading clear and make operation more convenient A 30mm size LCD with backlight display makes the reading clear and make operation more convenient This instrument has the function of measuring DC and AC voltage DC and AC current Resistance Capacitance Hz hFE Diodes and Continuity For AC measuring it is performed by high accuracy true rms has the feature of wide bandwidth measuring and to get accurate rms for AC flow of any waveform or AC DC This instrument adopts double integral A D converter as its core It is an ideal tool for labs factories and radio technology 2 WARNING The instrument is designed according to IEC1010 standard safety standard issued by International Electro technical Committee Please read the following before operation Do not input a value beyond the limited ones when measuring each range The voltage less than 36V is the safe voltage Please check the connection and insulation of test leads to avoid electric shock when measure the voltage higher than DC36V and AV25V The test leads should be far away the test points when change the function and range Select correct function and range to avoid fault operation Please don t in2. Overload protection 36V DC or AC peak value Frequency FREQ Range Accuracy Resolution 20kH 1H 3 1 0 reading 20 2 200kHz 10Hz Input sensitivity 5 00mV rms Overload protection 250V DC or AC peak value within 15s hFE measuring Range Displaying Test condition hFE NPN or PNP 0 1000 0 Base current is eee OuA Vce is approx Diode and continuity test Range Description Test condition Pt o The measuring value is the approx value for forward voltage drop When the resistance under tested is less than 30Q 10Q buzzer sounds and display the approx value The open circuit voltage is approx 3V Forward DCA is approx ImA backward DCV is less than 3V Overload protection 250V DC and AC peak value 4 OPERATION 4 1 PANEL DESCRIPTION V 5 VY E 750V 20 ya Vg 2 DUAL DISPLAY MULTIMETER a a 20162 a e 200mA r so00v0c 2MO 26 30 000 200k A gt 6 20A 20606 0 20A com 5 LEOA NNN JG 26 p e 2002 V S JE 200mA n INPUTS GY a E L gt A Pama 0 20Hz 20nF 200kHz pre 200uF re 6 y P r B INE t 10secMAX f 2A MAX N 20A FUSE FAST FUSE 2 R 06920 C J l
3. lope pa HOLD ACsDC PNpE Enon Cx CAT II 1000V O WER IUUUUUUUDUD IUDUUUUUUUU WARNING A ch Une ser GROUNDING CONDUCTOR IN POWER CORD MUST BE CONNECTED TO ENSURE PROTECTION FROM ELECTRICAL SHOCK AC 220V AC 110V CAUTION A i FOR FIRE PROTECTION REPLACE ONLY WITH 200mA SLOW FUSE 100 120V 100mA SLOW FUSE 220 240V ICE 20VA 50 60hHz 14 15 16 1 LCD 2 Power switch 3 Function knob 4 V Q Hz input terminal 5 COM 6 Current lt 2A input terminal and 2A fuse socket 7 20A current input terminal 8 Backlight switch 9 Hold switch 10 AC DC measuring switch 11 hFE plug 12 Capacitance measuring plug 13 Bracket 14 110V 220V selector switch 15 Fuse 16 Power plug The meter is driven by 220V or 110V AC voltage The voltage is set on 220V when leave factory If the local line voltage is 110V please set the line voltage to 110V by the selector switch on rear panel When operating first connect the power line to power plug then turn on the power NOTE Before connecting the circuit under measured be sure that the measured value should not exceed the limit specified in front panel 4 2 DCV measurement Connect the black test lead to COM terminal and the red one to VQHz terminal Set the function knob to V range connect the test leads across to the circuit under measured the polar
4. 1 0 reading 50 100mV The input value for accuracy guarantee should be larger than 10 of full range Input impedance 2MQ for all ranges Overload protection 200mV range 250V DC or AC peak value other range 1000V DC or AC peak value DC current DCA Range Accuracy Resolution ame 0 35 reading 10 nae 2A 100uA 20A 0 8 reading 10 aa Max input voltage drop 200mV Max input current 20A within 10s Overload protection 2A 250V fuse 13A 250V fuse AC current ACA Range Input frequency Accuracy Resolution 200mA 50Hz 5kHz 0 8 reading 80 10uA 2A i 100uA 20A 50Hz 400Hz 1 0 reading 50 TA Max input voltage drop 200mV Max input current 20A within 10s Overload protection 2A 250V fuse 13A 250V fuse Resistance Q Range Accuracy Resolution 20062 0 1 reading 20 0 010 2kQ 0 10 as 0 1 Yreading 5 aan 2MQ 100Q 20MQ 0 5 reading 5 1kO Open circuit voltage less than 3V Over load protection 250V DC or AC peak value NOTE At range 200 Q short circuit the test leads to measure the wire resistance and then subtracts it from the real measurement Capacitance C Range Accuracy Resolution 20nF lpF 3 5 20 100pF 200uF 5 30 10nF Measuring frequency approx 400Hz Measuring voltage approx 40mV
5. s normal in high resistance measuring When the input terminal is in open circuit OL displays When measuring resistance in line be sure that power of the circuit under measured is turned off and all capacitors are released completely If big error occurs perhaps it effected by other elements in line or there resist voltage on the ends of this resistance Do not input voltage at the resistance range 4 7 Capacitance measurement Set the knob to F range Insert the capacitor under tested to Cx terminal according to the polarity and turn on the AC DC measurement switch Connect test leads across to the two capacitors It be careful the polarity NOTE Set the knob to a higher range when the LCD only displays 1 if the capacitance under tested exceeds the max value of selected ranges When pressing AC DC switch before testing the LCD will not display 0 which resulted in the higher input value displaying If AC DC switch is at the state of jumping LCD display the remnant data which is normal won t affect the test result The LCD will not display stable data if it resists creep age badly or destroy the capacitance when measuring at the higher capacitance range Release the capacitor completely to avoid damaging the meter before measuring 4 8 hFE Set the function knob to hFE range Be sure the transistor is NPN style or PNP style insert the transmit polarity basic polarity collector to
6. e should set to a higher range The max input current is 2A or 20A It decided by the COM of red test lead insert into large current will blow the fuse Be careful when measuring 20A range running large current will make the circuit heat even make the circuit damaged 4 5 ACA measurement Connect the black test lead to COM terminal and the red one to mA terminal max 2A or 20A terminal max 20A Set the knob to A range connect the test leads across to the circuit under measured NOTE Ifthe current under measure is unknown beforehand start from the highest range and work down Ifonly the MSD displays 1 it means over range should set to a higher range To get more accuracy it s better to select the range which the reading is more than 10 of full range The max input current is 2A or 20A It decided by the COM of red test lead insert into large current will blow the fuse Be careful when measuring 20A range running large current will make the circuit heat even make the circuit damaged 4 6 Resistance measurement Connect the black one to COM terminal the red test lead to VQHz terminal Set the knob to Q range connect the test leads across to the resistance under measured NOTE If the resistance is larger than the value of selected range 1 displays Set the function knob to a higher range When the resistance is larger than 1MQ it will take a few seconds to be stable it
7. ity will be displayed with the voltage reading value NOTE Ifthe voltage under measured is unknown beforehand start from the highest range and work down Ifonly MSD displays 1 it means over range should set to a higher range Do not input a voltage over 1000V otherwise the circuit might be damaged Becareful when measuring high voltage circuit 4 3 ACV measurement Connect the black test lead to COM terminal and the red one to VOHz terminal Set the function knob to V range connect the test leads across to the circuit under measured NOTE Ifthe voltage under measured is unknown beforehand start from the highest range and work down If only MSD displays 1 it means over range should set to a higher range To get more accuracy it s better to select the range which the reading is more than 10 of full range Do not input a voltage over 1000Vrms otherwise the circuit might be damaged Be careful when measuring high voltage circuit 4 4 DCA measurement Connect the black test lead to COM terminal and the red one to mA terminal max 2A or 20A terminal max 20A Set the function knob to A range connect the test leads across to the circuit under measured the polarity will be displayed with the voltage reading value NOTE Ifthe current under measure is unknown beforehand start from the highest range and work down Ifonly the MSD displays 1 it means over rang
8. put voltage value when measuring resistance The test leads should be far away the test points and turn off the power when change the fuse Introduction for safety symbol a i 2 exists high voltage GND dual insulation must refer to manual 3 SPECIFIFACTION 3 1 GENERAL SPECIFICATION Display LCD Max display 19999 4 1 2 digit large LCD with back light and auto polarity display Measuring method double integral A D converter Sampleing rate approx 3 times sec Over range display 1 Working environment 0 40 C R H lt 80 Power supply DC 220V 110V 50 60Hz Dimension 260mmx220mmx82 mm Weight approx 2kgs Accessories manual test leads power cord box 3 2 TECHNICAL SPECIFICATION 3 2 1 Accuracy reading the lowest effective digit temperature for accuracy guarantee 23 5 C R H lt 80 one year guaranteed from the production date 3 2 2 Technical data DC voltage DCV Range Accuracy Resolution 200mV 10uV 2V a 100uV 20V 0 05 reading 3 ImV 200V 10mV 1000V 0 1 Yreading 5 100mV Input impedance 10MQ for all ranges Overload protection 200mV range 250VDC or AC peak value Other range 1000V DC or AC peak value AC voltage ACV Range Input frequency Accuracy Resolution 200mV 50Hz 50kHz 10uV 2V BAe REN 100uV 20V 50Hz 20kHz 0 8 reading 80 ImV 200V 50Hz SkHz 10mV 750V 50Hz 400Hz
9. s Do not measure voltage at the Q range When replacing fuse please take away the test leads from the measuring point and power off at first Keep the instrument away from water dust and shock Do not operate the meter in high temperature or strong magnetic place Do not use the abrasives or solvents to clean the meter 5 1 Fuse replacement NOTE Please select fuse of the same specification to replace it Power fuse 200mA 250V located in input power socket Fuse for measuring current 2A 250V located in the current input terminal 13A 250V located the main circuit Power fuse replacement Pull out the power cord firstly takes out the fuse jack on the top of power plug Take off the fuse and replace an equivalent one then turn on the fuse jack 2A fuse replacement Press mA input jack by finger take out the fuse jack after turning 90 angle by an inverse hour direction Take off the fuse and replace an equivalent one then turn on the fuse jack After press the fuse into the fuse jack turning 90 angle by an inverse hour direction 13A fuse replacement must be replaced by qualified personal Screw off the four screws on the button shell by Phillips screwdriver take off the upper shell Take off the fuse and replace an equivalent one then turn on the fuse jack Take on the shell Screw on the four screws on the button shell by Phillips screwdriver 6 TROUBLE SHOOTING If the meter does not work properly take actions a
10. s descriped in this manual to check out if the meter is defective or not Once defective or malfunctioning is confirmed please contact your local distributor or the manufacturer for repairing The specifications are subject to change without notice The content of this manual is regarded as correct If any error or omits is found please contact with the manufacturer 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 8055 V2 0
11. the correct COM 4 9 Diode and continuity test Connect the black one to COM terminal and the red test lead to VOHz terminal note the polarity of the red leadis Set the function knob to range connect the test leads across to the diode the red one connect anode polarity the reading is the value of forward voltage drop When measuring diode if making continuity test buzzer sounds when the resistance between the test leads is less than approx 30 10 Q 4 10 Frequency measurement Connect the test leads or shielded cable to COM and VQHz terminal Set the function knob to frequency range connect test leads or cable across to the signal source or load under tested NOTE In noisy environment it is preferable to use shielded cable for measuring small signal Be careful when measuring high voltage circuit Do not input voltage over DC 250V or AC peak value voltage aviod to damaging the meter 4 11 Data hold Press the hold switch the data will keep on LCD 4 12 Backlight displaying Press switch backlight will turn on press it again it will turn off 5 MAINTENANCE Do not verify the circuit to avoid damaging Power fuse 200mA 250V located in input power socket Fuse for measuring current 2A 250V located in the current input terminal 13A 250V_ located the main circuit The fuse must be replaced by qualified personnel NOTE Do not connect the voltage higher than DC1000V or AC 1000V rm
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