DIGITAL MULTIMETER INSTRUCTION MANUAL
Contents
1. 40kQ 102 400kQ 1002 4MQ 1kQ 40MQ 1 2 5 10kQ Open circuit voltage 4 00mV Overload protection 250V DC AC peak value NOTE At 400Q range short the test leads first to measure the wire resistance and then subtracts it from the real measurement Or press REL to clear the wire resistance and read the value directly 3 2 7 Capacitance C Range Accuracy Resolution 4nF 2 5 6 lpF 40nF 10pF 400nF 100pF 3 5 8 4uF InF 40uF 10nF 200uF 5 0 8 100nF Overload protection 250V DC AC peak value WARNING Do not discharged before mal power is cut off before 3 2 8 Frequency F input any voltage at this range The capacitor must be ing measurement When measuring in line capacitor mal testing completely e sure the Range Accuracy Resolution 10Hz 0 001Hz 100Hz 0 01Hz 1000Hz 0 1Hz 10kHz 0 5 4 1Hz 100kHz 10Hz 1MHz 100Hz 30MHz 1kHz Input sensitivity 0 7V Overload protection 250V DC AC peak value 3 2 9 Transistor hFE Measurement Range Test conditions Base current is approx 15uA hFE NPN or PNP 0 1000 Vce is about 4 5V 3 2 10 Diode and Continuity Test Range Description Test Conditions Forward DC current is Diode forward voltage drop approx 0 5mA reverse voltage is approx 1 5V When the resistance under test is less t2. The specifications are subject to changes without prior notice The content of this manual is regarded as correct If users find out any mistakes or omissions please kindly contact the manufacturer The manufacturer will not be responsible for accidents and damage caused by improper operations The functions described in this User Manual shall not be considered as the reason for any special usages
3. lead into COM terminal and the red one into V Q Hz terminal 4 3 2 Switch the knob to V range and press DC AC key to choose AC mode 4 3 3 Auto range is the original states it will display AUTO symbol Press RANGE key to change to manual range mode and 400mV 4V 40V 400V 750V range is selectable 4 3 4 Connect test leads to the test point LCD will display voltage of the two test points Note 1 At 400mV range there is only manual range available 2 Under manual range mode if LCD displays OL it means over range you should select the higher range 3 Do not input a voltage over AC 750V It may cause damage to the circuit of meter 4 Be careful while measuring a high voltage circuit DO NOT touch the high voltage circuit 5 The built in buzzer will beep to warn user when the measuring voltage over AC7S0V 4 4 DCA measurement 4 4 1 Insert the black test lead into COM terminal and the red one into mA terminal Max 400m lt A or into A terminal Max 20A 4 4 2 Switch the knob to a proper current range and then connect the test leads to the electric circuit LCD will display polarity and current of the test point connected by the red test lead Note 1 Firstly users should select the highest range if users not sure about the range of current under test and then select the proper range based on displaying value 2 If the LCD displays OL it means the current is over
4. range Now you need to select a higher range 3 When tested current gt 10A at 20A range buzzer will sound to remind user 4 Maximum input current is 400mA or 20A subject to where the red test lead insert into Current higher than that will damage the fuse and may cause damage to the circuit of meter 4 5 ACA measurement 4 5 1 Insert the black test lead into COM terminal and the red one into mA terminal Max 600mA or into A terminal Max 20A 4 5 2 Switch the knob to a proper current range press DC AC key to select the AC mode and then connect the test leads to the electric circuit LCD will display current value Note 1 Firstly users should select the highest range if users not sure about the range of current under test and then select the proper range based on displaying value 2 If the LCD displays OL it means the current is over range Now you need to select a higher range 3 When tested current gt 10A at 20A range buzzer will sound to remind user 4 Maximum input current is 400mA or 20A subject to where the red test lead insert into Current higher than that will damage the fuse and may cause damage to the circuit of meter 4 6 Resistance measurement 4 6 1 Insert the black lest lead into COM terminal and the red one into V Q Hz terminal 4 6 2 Switch the knob to Q range and connect the leads with the resistor under test 4 6 3 Press RANGE key to choose auto or man
5. the black test lead into COM terminal and the red one into V Q Hz terminal the polarity of red lead is 4 10 2 Switch the knob to gt H range and press DC AC key to select diode measurement mode and then connect test leads with the diode under testing 4 10 3 Forward measurement connect red test lead to the positive polarity and the black test lead to the cathode polarity of the diode LCD will display the approx value of forward voltage drop 4 10 4 Backward measurement connect red test lead to the cathode polarity and the black test lead to positive polarity of the diode LCD will display OL 4 10 5 The complete diode testing includes forward and backward measurement if the result doesn t meet the descriptions above it means the diode is broken 4 10 6 Press DC AC key to select the Continuity measurement mode 4 10 7 Connect test leads to two points of tested circuit if the resistance is less than 70 10 Q the buzzer sounds Note 1 Don t input voltage at gt H range 2 Make sure the power is off and all capacitors are discharged Any AC signal will make the buzzer sounds 4 11 Temperature measurement 4 11 1 Switch the knob to C range 4 11 2 Insert the cold terminal free end of thermocouple in TEMP socket and put the working terminal temperature measuring end of thermocouple on the surface or inside the object to be tested Then you can read temperature fr
6. DIGITAL MULTIMETER INSTRUCTION MANUAL 1 SUMMARY This 3 3 4 digital multimeter with highly stable performance is driven by 2 pieces 1 5V battery It uses a LCD with 32mm high figure which makes the reading clearer and the operation more convenient The digital multimeter holds functions of measuring DCV ACV DCA ACA resistance capacitance frequency temperature duty cycle transistor diode and continuity etc It also can provide special functions including unit symbol display data holding relative value measuring auto manual range switching RANGE auto power off and warning alarm To assure high accuracy and resolution it adopts an 4 bit microprocessor and a dual integral A D conversion IC as its core which can drive LCD directly It is an ideal tool for labs factories and radio technology 2 SAFETY PRECAUTIONS The instrument is designed according to IEC1010 standard safety standard issued by International Electro technical Committee Please read the following before operation 2 1 Check the connection and insulation of test leads to avoid electric shock 2 2 To avoid electric shock and damage to the meter do not input voltage higher than DC 1000V or AC 750V during measurement 2 3 When measuring voltage higher than DC 60V or AC 40V please be careful 2 4 Select correct function and range to avoid fault operation 2 5 Please move the test leads away from test points when switching the function 2 6 Please don t inp
7. Q at other ranges is 1OMQ Overload protection 1000V DC or 750V AC peak value 3 2 3 AC Voltage ACV Range Accuracy Resolution 400mV 1 5 6 0 1mV 4V 1 mV 40V 0 8 6 10 mV 400V 100 mV 750V 1 0 6 1V Input impedance at 400mv range gt 40MQ at other ranges is 10MQ Overload protection 1000V DC or 750V AC peak value Frequency response at 750V range 40 100Hz at other ranges 40 400Hz Displaying sine wave RMS average value response 3 2 4 DC Current DCA Range Accuracy Resolution 400uA 0 1pA 4000uA 1pA 40mA 1 0 5 10pA 400mA 100nA 4A ImA 20A 2 0 5 10mA Maximum voltage drop 400mV for mA range and 200mV for A range Maximum input current 20A for 15 seconds Over load protection 0 5A 250V fast action fuse and 13A 250V fast action fuse 3 2 5 AC Current ACA Range Accuracy Resolution 400uA O luA 4000uA 1pA 40mA 1 5 5 10pA 400mA 1004A 4A ImA 20A 2 0 10 10mA Maximum voltage drop 400mV for mA range and 200mV for A range Maximum input current 20A for 15 seconds Over load protection 0 5A 250V fast action fuse and 13A 250V fast action fuse Frequency response 40 100Hz under 10A range 40 400Hz at other ranges 3 2 6 Resistance Q Range Accuracy Resolution 4002 0 8 5 0 1 4kQ 0 8 1 IQ
8. citor still in the Cx terminal 2 In order to assure the accuracy please press REL to clear the reading before testing 3 There is only the auto range mode under the capacitance range 4 The capacitor must be completely discharged before testing 5 The reading of 200uF range will take more than 15 seconds to be stable 4 8 Frequency measurement 4 8 1 Insert the black lest lead into COM terminal and the red one into V Q Hz terminal 4 8 2 Switch the knob to Hz range connect the test leads or shielded cable to the signal source or the load which is tested 4 8 3 Press Hz DUTY key to switch frequency duty cycle measurement LCD will display the frequency or duty cycle of the signal source which is tested Note 1 There is only the auto range mode under the frequency range 2 The meter can still work if the input current is higher than 10V rms but the accuracy is not guaranteed 3 In noisy environment it s better use shield cable to measure a low signal 4 When measuring high voltage circuit do not touch the high voltage circuit 5 Don t input voltage higher than 250V DC or AC peak value or it may damage the meter 4 9 Transistor hFE measurement 4 9 1 Switch the knob to hFE range 4 9 2 Define the transistor is NPN or PNP type then insert the emitter base and collector separately into the relative hole the value will be displayed on LCD 4 10 Diode and Continuity test 4 10 1 Insert
9. h temperature high humidity combustible explosive and strong magnetic place 7 Wipe the case with a damp cloth and detergent Do not use abrasives and alcohol to clean the meter 8 If do not operate for a long time you should take out the battery to avoid leakage damage 9 When E symbol is displayed you should replace the battery according to the following steps 9 1 Follow picture 2 and remove the holster at first 9 2 Unlock the battery door and remove the cover 9 3 Replace the old battery with the new one For longer using life it s better to use alkaline battery 9 4 Fix the battery door 9 5 Follow the picture to put on the holster 10 Fuse change When replacing fuse please use fuse with same type and specification 10 1 Follow picture 2 and remove the holster at first then unlock the battery door and remove the cover 10 2 Take out the fuse and put on a new one 10 3 Fix the battery door and put on the holster 6 TROUBLE SHOOTING If the meter does not work properly please check the meter as following steps if the problems still cannot be solved please refer to repairing center or contact the local dealers Fault Solution a Turn on the power No reading on LCD a Replace battery E signal appears a Replace battery No current or temperature input a Replace fuse Big error Value a Replace battery
10. han 70 10Q buzzer sounds Open circuit voltage 0 5V continuously Overload protection 250V DC AC peak value WARNING Do not input any voltage at this range 3 2 11 Temperature C Range Accuracy Resolution lt 400 C 0 8 4 40 C 1000 C 1c gt 400 C4 1 5 15 Thermocouple K type WARNING do not input any voltage at this range 4 OPERATION 4 1 Panel Description LCD display the measuring value and unit Function key 1 RST key when the meter under sleep or lock states press this key the meter will be active 2 Hz DUTY key when measuring the AC Hz DUTY can voltage current press choose voltage frequency duty cycle or current frequency duty 00O 0O cycle mode When measuring the Frequency press Hz DUTY will shift between frequency and duty cycle 99 measurement 3 REL key press it to store the present reading as a reference for subsequent readings The display is zeroed and the stored reading is subtracted from all subsequent readings and REL symbol appears REL readings input value reference value Press it again to exit the REL mode and REL symbol will disappear 4 HOLD key press the key the measuring value will be held on LCD and HOLD symbol appears Press it again to exit the hold mode and HOLD symbol will disappear 5 RANGE key auto range is the default when you turn o
11. n the meter Press RANGE it will enter manual range mode Under manual range mode press RANGE each time will select a higher range till reach the highest range then back to the lowest range Press RANGE for 2 seconds it will back to auto range mode 6 DC AC key select DC AC mode Input terminal for hFE measurement Rotary switch used to change the range and choose functions Input terminal for temperature measurement Voltage current resistance frequency input terminal Battery case 4 2 DCV measurement 4 2 1 Insert the black test lead into COM terminal and the red one into V Q Hz terminal 4 2 2 Switch the knob to V range Press DC AC key to choose DC mode 4 2 3 Auto range is the original states it will display AUTO symbol Press RANGE key to change to manual range mode and 400mV 4V 40V 400V 1000V range is selectable 4 2 4 Connect test leads to the test point LCD will display polarity and voltage of the test point connected by the red test lead NOTE 1 Under manual range mode if LCD displays OL it means over range you should select the higher range 2 Do not input a voltage over DC 1000V It may cause damage to the circuit of meter 3 Be careful while measuring a high voltage circuit DO NOT touch the high voltage circuit 4 The built in buzzer will beep to warn user when the measuring voltage over DC1000V 4 3 ACV measurement 4 3 1 Insert the black test
12. om the screen and the data is in Centigrade Note 1 If insert the thermocouple oppositely it will display the wrong value When the temperature is rising the value will be down 2 When the input terminal is open circuit it will display the environment temperature 3 Don t change the temperature probe randomly or the accuracy will not be guaranteed 4 Don t input voltage at temperature range 4 12 Data hold Press HOLD will enter HOLD mode the current value will be held on LCD and HOLD symbol will be displayed Press HOLD again can exit the HOLD mode 4 13 Auto power off 4 13 1 If there is no measurement in 15 minutes the meter will turn into dormancy mode 1 minute before the auto power off the built in buzzer will be sound 5 times Press any key to restart the meter 4 13 2 Keep DC AC key down when turn on the meter auto power off function will be canceled 5 METER MAINTENANCE The meter is a precise instrument Random changes to the circuit are not allowed Note 1 Don t input the voltage value higher than DC 1000V or AC 750V rms 2 Don t input voltage at current resistance diode and continuity range 3 Don t make any measurements when the battery isn t installed or the back cover isn t fixed 4 Before replacing fuse please remove the test leads from the measuring point and turn off the power 5 Keep the meter away from water dust and shock 6 Don t expose the meter under hig
13. ual range 4 6 4 Before measuring low resistance you should make the test leads short circuit at first and then press REL By this way you can get the actual value of the resistance Note 1 Firstly users should select the highest range if the value of resistance is unknown beforehand and then select the proper range based on displaying value 2 The LCD displays OL when the resistance is over the selected range The knob should be adjusted to a higher range When measuring value is over 1MQ the reading will take a few seconds to be stable It s normal for high resistance measurement 3 When input terminal is in open circuit LCD will display OL 4 Before measuring in line resistor make sure that the power is off and all capacitors are discharged completely 5 When there is big error it may be affected by other online component or there is voltage on the resistor 6 Do not input any voltage at resistance range 4 7 Capacitance measurement 4 7 1 Switch the knob to range 4 7 2 Insert the black test lead to COM terminal and the red one to V Q Hz terminal 4 7 3 If the LCD doesn t display 0 press REL to clear the reading 4 7 4 Connect the capacitor to COM and VQHz terminal Note the red test lead is for positive pole LCD displays capacitance value Note 1 Don t input voltage or current to the VQHz terminal when measuring the capacitance or the capa
14. ut voltage in current terminal 2 7 Please don t modify the circuit arbitrarily it may cause safety problem 2 8 Introduction for safety symbols exists high voltage GND dual insulation Operator must refer to manual h P Low battery indication 3 FEATURES 3 1 General Characteristics 3 1 1 Display LCD 2 Max display 4000 3 3 4 digits automatic polarity and unit symbol display 3 Measurement method double integral A D conversion 4 Sampling rate approx 3 times sec 5 Over range display OL displayed in the highest digit 6 Low battery display E 7 Working environment 0 40 C relative humidity lt 80 8 Store condition 10 50 C relative humidity lt 80 9 Power supply 2pcs 1 5V battery AAA 7 battery 10 Dimension 185x93x35mm length width height 11 Weight approx 290g including battery WwW WwW WWW www Ww 3 1 12 Accessories test leads user manual TPO1 temperature probe gift box and 2 1 5V batteries 3 2 Technical Features 3 2 1 Accuracy a x reading data digits To assure accuracy the environment temperature should be 23 5 C relative humidity should lt 75 One year guarantee since production date 3 2 2 DC Voltage DCV Range Accuracy Resolution 400mV 0 1mV 0 5 4 4V 1 mV 40V 10 mV 400V 100 mV 1000V 1 0 4 1V Input impedance at 400mv range gt 40M
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