Table of Contents Safety Information.. 1 Your Digital Multimeter Making Measurements... 12

Transcription

1 Users Manual

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3 Table of Contents Safety Information.. 1 Important Safety Instructions. 1 Symbol Explanation. 4 Your Digital Multimeter Introduction... 5 Names of Components... 8 LCD Display Other Functions Making Measurements Introduction Measuring DC/AC Volts Measuring DC/AC Milliamps. 15 Measuring DC/AC Amps Measuring Resistance and Continuity 19

4 Measuring Capacitance Measuring Inductance Measuring Frequency Measuring Temperature Diode Testing TTL Logic Testing Transistor Testing User Maintenance Replacing the batteries. 33 Replacing the Fuses 34 Others 35 Specifications General Specifications.. 36 Resolution and Accuracy 37

5 Safety Information READ THIS MANUAL CAREFULLY BEFORE USING THIS MULTIMETER! The digital multimeter has been designed according to IEC concerning safety requirements for electrical measuring instruments with an overvoltage category (1000V CAT ) and pollution 2. Important Safety Instructions Injury or death can occur even with low voltages and low current. It is extremely important that you read this safety information before using your multimeter. Follow all safety practices and proper operating procedures for equipment being tested. 1

6 Disconnect the power and discharge high-voltage capacitors before testing in Ohms, Continuity, Diode, Capacitance, and other test of on circuit Inspect the test leads for damaged insulation or exposed metal. Check test lead continuity. Damaged leads should be replaced. Do not use the instrument if it looks damaged. Select the proper function and range for your measurement. User caution when working above 60V DC or 30V AC rms. Such voltages pose a shock hazard. Disconnect the live test lead before disconnecting the common test lead. When using the probes, keep your fingers away from probe contacts. Keep your fingers behind the finger guards on the probes. When measuring current, turn the power off to the circuit being tested before connecting the meter test lead in the circuit. 2

7 Place test leads in proper input terminals Measurement time must fewer 10 seconds at measuring great current every times, and the interval time must more 15 minutes every times. Do not operate this multimeter in an explosive atmosphere (i.e., in the presence of flammable gases or fumes, vapor or dust.). Never replace the protective fuse inside the multimeter with a fuse other than the specified or approved equal fuse. Replace only with same type of fuses. To avoid electrical shock, disconnect the test leads and any input signals before replacing the fuses. Replace only with same type of battery. To avoid electrical shock, disconnect the test leads and input signals before replacing the battery. Do not attempt calibration or service unless trained and another person capable of rendering first aid and resuscitation is present. 3

8 Symbol Explanation Attention! Refer to the user manual Dangerous voltage may be present at terminals Ground (Earth terminal) AC(Alternating current) DC(Direct current) AC or DC Battery Fuse Conforms to European Union directives Double insulation (Protection Class Ⅱ) 4

9 Your Digital Multimeter Introduction This meter is a portable professional measuring meter with digital and 40 segment graph bar display. And the meter has functions of date hold and back light, to easily read measurement result. Overload protection and low battery indication are provided, this meter is ideal for use in the fields, workshop, school, hobby, and home applications. Include following measuring functions: DC/AC Volts DC/AC Current Resistance Capacitance Inductance Frequency Temperature Continuity Diode Transistor TTL logic 5

10 AC hfe khz H mh M k ma A uf nf mv V LIGHT / HOLD Lx/Cx 200m Lx u 2u 200n 20n 2n Cx 10A ON OFF 2m 20m hfe PNP NPN 200 2k 20k kHz 200m 20m 2m A ma Lx COM 200k 2M 20M 200m 2 20 V V CAT II V Hz 1000V 700V Figure 1 6

11 D ELECTRICA E TEST LEADS G BATTERY C EETS:IEC1010 CAT III POLLU VENT FIRE, US 10A/250V 6 0.5A/250V 5.5V X 6 SIZE A Figure 2 7

12 Names of Components. LCD Display measuring result and function, and other symbol. ⑵. key When measuring AC, you must press down this key at Volts or Current range. ⑶. LIGHT Key When press down the key, Backlight will be on; backlight will be self-off about six seconds later. ⑷. Power Switch When press down this key, the meter s power will be on. ⑸. Function/Range selector rotary switch This switch selects the function and range. ⑹. Cx socket This Cx socket is made testing capacitor. ⑺.10A input terminal (socket) This is the positive input terminal for current measurement (AC or DC) up to 10A. 8

13 . /ma/lx input terminal (socket) This is the positive input terminal for temperature, ma or inductance. ⑼.COM input terminal (socket) This is the negative (ground) input terminal for all measurement modes. ⑽.V/Ω/Hz input terminal (socket) This is the positive input terminal for volts, resistance, frequency, diode continuity and logic. ⑾.Transistor socket This socket is made testing transistor. ⑿.HOLD key To press down this key, the display value will be locked and keep unchanged. To press the key again, the locked status will be erased and enter normal measurement status. ⒀.Lx/Cx key This key must be pressed down when measuring capacitance and inductance. ⒁.Bottom case 9

14 .Meter s bracket ⒃.Battery cover ⒄.Special screws The screws are used to fix battery. LCD Display AC hfe khz H mh M k ma A uf nf mv V Figure 3 ⑴. The HOLD function is on. ⑵. AC measurement status. ⑶. Negative measurement value. ⑷. hfe Transistor measurement status. 10

15 . Indication low battery ⑹. Analog graph bar ⑺. TTL logic test, When display, indication high logic; when display, indication low logic. ⑻. Display unit of measurement. ⑼. Continuity measurement status. ⑽. Display unit of measurement. ⑾. Diode measurement status. ⑿. Indication dangerous voltage (high volts). Other Functions ⑴. Auto power off. The meter will auto power off after about 10 minutes. Press up the key and press down the key, the power will be on again. ⑵. Buzzer. When doing continuity test, if the resistance is smaller than 50Ω, the buzzer will be sound. And when doing TTL logic test, if measurement result is low logic, the buzzer will be sound. 11

16 . Backlight. If the light is dark to make the reading difficult when measuring, you can press LIGHT key to open the back light. ⑷. Date Hold. If you need data hold when measuring, you can put on HOLD button, it will hold the reading; if you put the button again, data hold is not continue. Making Measurements Introduction This chapter shows overall procedures for making measurements in any of the rotary selector positions. Necessary input connections are shown. And safety information is showed. 12

17 Measuring DC/AC Volts ON OFF 200m Lx u 2u 200n 20n 2n Cx 10A 2m 20m hfe PNP NPN 200 2k 20k kHz 200m 20m 2m A ma Lx COM 200k 2M 20M 200m 2 20 V V CAT II V Hz V 1000V 700V Figure 4. Connect the black test lead to the COM jack and the red test lead to the V jack. ⑵. Set the range switch at the desired V range position. Connect the test leads as shown Figure 4. ⑶. When only the figure OL is displayed, it 13

18 indicates over range situation and the higher range has to be selected.. You can get a reading from LCD display. The polarity of the red lead connection will be indicated along with the voltage value. ⑸. When measuring AC volts, please press down the key; when measuring DC volts, please press up the key. WARNING: Can t measure higher than 1000V DC or 700V AC RMS. When the magnitude of the voltage to be measured is unknown, always set the rotary selector at the highest range. Don t touch any electrical conductors, to avoid electrical shock. After measuring completely, disconnection the test leads with the circuit to be measured, and remove the test leads from the meter. 14

19 Measuring DC/AC Milliamps ON OFF 200m Lx u 2u 200n Cx 10A hfe 2m 20m 20n 2n m 20m 2m A ma Lx 200 2k 20k 2M 20M 200m 2 20 V kHz 1000V CAT II COM PNP NPN 200k V Hz ma 1000V 700V Figure 5. Connect the black test lead to the COM jack and the red test lead to the ma jack. ⑵. Set the range switch at the desired ma range position. Connect the test leads as shown Figure 5. ⑶. When only the figure OL is displayed, it indicates over range situation and the higher 15

20 range has to be selected.. You can get a reading from LCD display. The polarity of the red lead connection will be indicated along with the voltage value. ⑸. When measuring AC current, please press down the current, please press up the key; when measuring DC key. WARNING: Can t measure higher than 200mA in ma range, otherwise the fuse will blowout. After measuring completely, disconnection the test leads with the circuit to be measured, and remove the test leads from the meter. 16

21 Measuring DC/AC Amps ON OFF 200m Lx u hfe 2m 20m PNP NPN 200 2k 20k 200k 2M 20M 200m A 2u 200n Cx 10A 20n 2n m 20m 2m A ma Lx kHz COM V CAT II V Hz V 1000V 700V Figure 6. Connect the black test lead to the COM jack and the red test lead to the 10A jack. ⑵. Set the range switch at the desired 10A range position. Connect the test leads as shown Figure 6. ⑶. When only the figure OL is displayed, it 17

22 indicates over range situation.. You can get a reading from LCD display. The polarity of the red lead connection will be indicated along with the voltage value. ⑸. When measuring AC current, please press down the current, please press up the key; when measuring DC key. WARNING: Can t measure higher than 10A, otherwise the fuse will blowout. Measurement time must fewer 10 seconds at measuring great current every times, and the interval time must more 15 minutes every times. After measuring completely, disconnection the test leads with the circuit to be measured, and remove the test leads from the meter. 18

23 Measuring Resistance and Continuity 200m Lx u 200n Cx 2u 10A 20n 2n ON OFF hfe 2m 20m m 20m 2m A ma Lx 200 2k kHz COM 20k 200 PNP NPN 200k 20 2M 20M 200m V 1000V CAT II V Hz 1000V 700V Figure 7. Connect the black test lead to the COM jack and the red test lead to the Ω jack. ⑵. Set the range switch at the desired resistance range position. Connect the test leads as shown Figure 7. ⑶. When only the figure OL is displayed, it 19

24 indicates over range situation and the higher range has to be selected.. You can get a reading from LCD display. ⑸. When doing continuity test, if the resistance is smaller than 50Ω, the buzzer will be sound. Connect the test leads as shown Figure 7. WARNING: Before measuring resistance in circuit to be sure power off; and to be sure capacitance has been discharge fully. After measuring completely, disconnection the test leads with the circuit to be measured, and remove the test leads from the meter. 20

25 Measuring Capacitance 200m Lx u 2u 200n 20n 2n Cx 10A ON OFF 2m 20m hfe PNP NPN 200 2k 20k kHz 200m 20m 2m A ma Lx COM 200k 2M 20M 200m V V CAT II V Hz 1000V 700V Figure 8. Set the range switch at the desired Cx range position and select proper range. and press down Lx/Cx key. ⑵. Insert the capacitance to the test socket as shown Figure 8. 21

26 . When only the figure OL is displayed, it indicates over range situation and the higher range has to be selected. ⑷. You can get a reading from LCD display. WARNING: Before measuring capacitance in circuit to be sure power off; and to be sure that has been discharge fully. After measuring completely, disconnection the test leads with the circuit to be measured, and remove the test leads from the meter. 22

27 Measuring Inductance 200m Lx u 2u 200n 20n 2n Cx 10A ON OFF 2m 20m hfe PNP NPN 200 2k 20k kHz 200m 20m 2m A ma Lx COM 200k 2M 20M 200m 2 20 V V CAT II V Hz 1000V 700V Figure 9. Connect the black test lead to the COM jack and the red test lead to the Lx jack. ⑵. Set the range switch at the desired Lx range position. Connect the test leads as shown Figure9. 23

28 . When only the figure OL is displayed, it indicates over range situation and the higher range has to be selected. ⑷. You can get a reading from LCD display. WARNING: Before measuring inductance in circuit to be sure power off; and to be sure capacitance has been discharge fully. After measuring completely, disconnection the test leads with the circuit to be measured, and remove the test leads from the meter. 24

29 Measuring Frequency ON OFF 200m Lx u 2u 200n 20n 2n Cx 10A 2m 20m hfe PNP NPN 200 2k 20k kHz 200m 20m 2m A ma Lx COM 200k 2M 20M 200m 2 20 V V CAT II V Hz V 1000V 700V Figure 10. Connect the black test lead to the COM jack and the red test lead to the Hz jack. ⑵. Set the range switch at the desired 20 khz range position. Connect the test leads as shown Figure10. 25

30 . When only the figure OL is displayed, it indicates over range situation. ⑷. You can get a reading from LCD display. WARNING: Determine that the amplitude level of the signal to be measured is not greater than the input voltage limit (250V). After measuring completely, disconnection the test leads with the circuit to be measured, and remove the test leads from the meter. 26

31 Measuring Temperature 200m Lx u 2u 200n 20n 2n Cx 10A ON OFF 2m 20m hfe PNP NPN 200 2k 20k kHz 200m 20m 2m A ma Lx COM 200k 2M 20M 200m 2 20 V V CAT II V Hz 1000V 700V Figure 11. Insert the Thermocouple to the COM jack and jack. ⑵. Set the range switch at the desired range position. Connect the test leads as shown Figure11. 27

32 . Put the Thermocouple on the object to be measured. ⑷. When only the figure OL is displayed, it indicates over range situation. ⑸. You can get a reading from LCD display. WARNING: The meter will display temperature inside meter, if no thermocouple. Don t enter and measure other signal. After measuring completely, disconnection the thermocouple and object to be measured, and remove the thermocouple from the meter. 28

33 Diode testing 200m Lx u 2u 200n 20n 2n Cx 10A ON OFF 2m 20m hfe PNP NPN 200 2k 20k kHz 200m 20m 2m A ma Lx COM 200k 2M 20M 200m 2 20 V V CAT II V Hz 1000V 700V Figure 12. Connect the black test lead to the COM jack and the red test lead to the jack. ⑵. Set the range switch at the desired range position. Connect the test leads as shown Figure12. 29

34 . The typical voltage drop should be about 0.6V for silicon diode or 0.3V for germanium diode ⑷. If the diode is reversing biased or there is an open circuit, The OL is displayed on LCD. ⑸. You can get a reading from LCD display. WARNING: Before measuring in circuit to be sure power off; and to be sure capacitance has been discharge fully. After measuring completely, disconnection the test leads with the circuit to be measured, and remove the test leads from the meter. 30

35 TTL Logic Testing ON OFF hfe 2m 20m 200m Lx u PNP NPN 200 2k 20k 200k 2M 20M 200m 2u 200n Cx 10A 20n 2n m 20m 2m A ma Lx kHz COM V CAT II V Hz V 1000V 700V Figure 13. Connect the black test lead to the COM jack and the red test lead to the V jack. ⑵. Set the range switch at the desired range position. Connect the test leads as shown Figure13. ⑶. When only the figure OL is displayed, it indicates over range situation and the higher 31

36 range has to be selected.. When volts (logic level) 0.8V, the will be displayed on LCD and buzzer will be sound. When volts (logic level) 2.0V, the displayed. will be Transistor Testing ON OFF hfe 2m 20m 200m Lx u PNP NPN 200 2k 20k 200k 2M 20M 200m 2u 200n Cx 10A 20n 2n m 20m 2m A ma Lx kHz COM V V CAT II V Hz 1000V 700V Figure 14 ⑴. Set the range switch at the desired hfe range position. Test as shown Figure14. ⑵. You can get a reading from LCD display. 32

37 User Maintenance Replacing the Batteries If the meter display on LCD, the battery must be replaced to maintain proper operation. Following procedure to replacing the battery:. Press POWER key to OFF. Disconnect test leads from any live source and remove the test leads from the input terminals. ⑵. Remove the two special screws on the battery cover and open the cover. ⑶. Remove the exhausted battery and replace with a new 9V battery (IEC6F22 JIS006P NEDA1604 type). ⑷. Don t use the meter before the batter cover is in place and fastened fully. 33

38 Replacing the Fuses Following procedure to replacing the fuse:. Press POWER key to OFF. And disconnect test leads from any live source and remove the test leads from the input terminals. ⑵. Remove the two screws on the battery cover and open the cover. ⑶. Remove the blown fuse and replace with fuse of the same size and rating. Make sure the new fuse is centered in the fuse holder. ⑷. The ma input terminal is protected by F0.5A/250V fast blow ceramic fuse, Φ5 20. The A input terminal is protected by F10A/250V fast blow ceramic fuse, Φ ⑸. Don t use the meter before the batter cover is in place and fastened fully. 34

39 Others. Clean your digital multimeter with a damp cloth and mild detergent. Do not use abrasives, solvents, or alcohol. ⑵. If any faults or abnormalities are observed, the meter can not be used any more and it has to be checked out. 35

40 Specifications General Specifications Maximum voltage between terminals and earth ground: 1000V. Display: 1999 counts, automatic polarity. And 40 segments bar graph. Over range: OL will be displayed. Low battery: will be displayed Updates: approx. 3 times per second. Data hold Back light Power supply: 9V IEC6F22, JIS006P, NEAD1604 type. Temperature: operating 0~40 C Storage -10~50 C Relative humidity: 20~80%RH Safety: Designed to IEC1010_ V CAT. Size: (mm). 36

41 Resolution and Accuracy Accuracy is given as ±(%reading +digits) at 18~28, relative humidity up to 80%. All specifications assume less than 1 year. ⑴. DC Voltage Range 200mV Resolution 0.1mV Accuracy (%rdg + digits) 2V 0.001V 20V 0.01V ±(0.5%+3) 200V 0.1V 1000V 1V ±(0.8%+3) Input impedance: 10MΩ Overload protection: DC1000V or AC700V 37

42 . AC Voltage Range 200mV Resolution 0.1mV 2V 0.001V 20V 0.01V 200V 0.1V Accuracy (%rdg + digits) ±(1.0 %+5) 700V 1V ±(1.2%+5) Input impedance: 10MΩ Frequency range: 40~400Hz. Overload protection: DC1000V or AC700V ⑶. DC Current Range 2mA 20mA Resolution 0.001mA 0.01mA Accuracy (%rdg + digits) ±(1.0%+3) 200mA 0.1mA ±(1.5%+5) 10A 0.01A ±(2.0%+5) Overload protection: ma --- F0.5A/250V Fuse A ---- F10A/250V Fuse 38

43 . AC Current Range 2mA 20mA Resolution 0.001mA 0.01mA Accuracy (%rdg + digits) ±(1.2%+5) 200mA 0.1mA ±(2.0%+5) 10A 0.01A ±(3.0%+5) Overload protection: ma --- F0.5A/250V Fuse A ---- F10A/250V Fuse Frequency range: 40~400Hz. ⑸. Resistance Range 200Ω 0.1Ω 2kΩ 20kΩ 200kΩ 2MΩ Resolution 0.001kΩ 0.01kΩ 0.1kΩ 0.001MΩ Accuracy (%rdg + digits) ±(1.0%+3) 20MΩ 0.01MΩ 200MΩ 0.1MΩ ±(5.0%+3) Open circuit voltage: 0.45V; Overload protection: 250Vp 39

44 . Capacitance Range 2nF 20nF 200nF 2μF 20μF Resolution 0.001nF 0.01nF 0.1nF 0.001μF 0.01μF Accuracy (%rdg + digits) ±(4.0%+5) ⑺. Inductance Range Resolution 2mH 0.001mH 20mH 0.01mH 200mH 0.1mH 2H 0.001H 20H 0.01H Accuracy (%rdg + digits) ±(4.0%+5) Overload Protection: F 200mA/250V fuse (quick acting, resistance 1Ω) Tested Inductance: Q 10,Internal impedance 1kΩ 40

45 . Frequency Range Resolution Accuracy (%rdg + digits) 20kHz 0.01kHz ±(1.5%+5) Sensitivity: 250mV rms and input no more 10V rms Overload Protection: 250V ⑼. Temperature Range Resolution Accuracy (%rdg + digits) -20~ ±(3.0%+3) Overload Protection: ma ---- F0.5A/250V ⑽. Transistor Range Function Display: read approximate hfe value hfe (0-1000) of transistor under test (ALL TYPE) Base Current: approx. 10µA,Vce: approx. 2.8V 41

46 . Diode Range Resolution Function 1mV Forward DC Current: approx. 1mA Reversed DC Voltage: approx.2.8v Display :read approximate forward voltage of diode Overload Protection: 250V DC or rms AC ⑿. Continuity Range Function Built-in buzzer will sound, if resistance is lower than 50Ω. Open circuit voltage: approx. 2.8V Overload Protection: 250V DC or rms AC ⒀. TTL Logic Range Function When logic level is less or on 0.8V, LCD displays and the buzzer produces sound. When logic level is more and on 2.0V, LCD displays. Overload Protection: 250V DC or rms AC 42

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