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KJ70A/KJ70B

Digital Multimeter

Operation Manual

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Summary of Contents for KJ70A

Page 1: ...KJ70A KJ70B Digital Multimeter Operation Manual...

Page 2: ...able structure and highly reliable hand held measuring instrument The Meter uses large scale of integrated circuit with double integrated A D converter as its core and has full range overload protecti...

Page 3: ...ategory CAT II 1000V CAT III 600V and double insulation CAT II Local level appliance PORTABLE EQUIPMENT etc with smaller transient overvoltages than CAT III CAT III Distribution level fixed installati...

Page 4: ...measurement has been completed disconnect the connection between the test leads and the circuit under test remove the testing leads away from the input terminals of the Meter and turn the Meter power...

Page 5: ...sonal injury z When servicing the Meter use only the same model number or identical electrical specifications replacement parts z The internal circuit of the Meter shall not be altered at will to avoi...

Page 6: ...ator Diode DC Direct Current Continuity Test AC Alternating Current Warning Refer to the Operating Manual Conforms to Standards of European Union The Meter Structure see figure 1 1 LCD Display 2 Data...

Page 7: ...of transistor Buttons POWER Power switch HOLD Data hold button Measurement Operation DC AC Voltage Measurement To measure DC AC voltage connect the Meter as follows Set the rotary switch to desired o...

Page 8: ...s and the circuit under test and remove testing leads from the input terminals DC AC current Measurement To measure DC AC current connect the Meter as follows Set the rotary switch to desired or A ran...

Page 9: ...etween 2 measurements greater than 15 minutes e Remember to cut off the power supply of the circuit be measured before connect it f Do not apply any voltage to the input when the Meter is working in c...

Page 10: ...king in resistance measuring mode b If resistance of the circuit or resistor be measured is open or higher than the range be selected the display will show 1 c For low resistance measurement it maybe...

Page 11: ...rs before testing the diode in circuit To do diode test connect the Meter as follows Set the rotary switch to range Connect the RED test lead into V input terminal and BLACK test lead into COM input t...

Page 12: ...vices under test disconnect circuit power and discharge all the high voltage capacitors before doing continuity test in circuit To do continuity test connect the Meter as follows Set the rotary switch...

Page 13: ...leads from the input terminals Capacitance Measurement Warning To avoid damages to the Meter or to the devices under test disconnect circuit power and discharge all the high voltage capacitors before...

Page 14: ...Converter Socket e If you use the test leads to measure directly when the measurement has been completed disconnect the connection between the testing leads and the circuit under test and remove test...

Page 15: ...w temperature measuring range c When the measurement has been completed remove the temperature probe and disconnect the Converter Socket hFE Measurement To measure value of transistor connect the Mete...

Page 16: ...When it is active the display value will be freezed on display until it be released Auto Power OFF If no any operation in 15 minutes the Meter will enter sleep mode and it has a little power consumpt...

Page 17: ...rds IEC 61010 1 in pollution degree2 overvoltage category CAT II 1000V CAT III 600V and double insulation Safety certificate A mA input protection Self Healing Fuse EMC consider the accuracy is need t...

Page 18: ...oad protection 1000V rms except 200mV range it is 250V rms AC Voltage Range Resolution Accuracy 2V 1mV 20V 10mV 200V 100mV 0 8 3 750V 1V 1 2 3 Input impedance 10M approx Overload protection 1000V rms...

Page 19: ...measured current is more than 10A the continuous measurement time is 10 seconds maximum and interval time between 2 measurements greater than 15 minutes AC Current Range Resolution Accuracy 2mA 1 A 20...

Page 20: ...0 0 1 2K 1 20K 10 200K 100 2M 1K 0 8 1 20M 10K 1 0 2 Overload protection 250Vrms Note At 200 range as a tip you can short the test leads firstly and record down the resistance then subtract it from th...

Page 21: ...a circuit under test is between 10 to 70 The buzzer does not sound if the resistance of a circuit under test is higher than 70 Capacitance Range Resolution Accuracy 20nF 0 01nF 200nF 0 1nF 20uF 0 1 F...

Page 22: ...ce Warning To avoid electrical shock or damage to the Meter please disconnect the test leads before open the case General Service Please have the Meter repaired to the reparing department be specified...

Page 23: ...disconected from the circuit being tested before opening the bottom case Follow below process to replace the battery Turn the Meter off and remove all the connections from the input terminals Turn th...

Page 24: ...23 End This operating manual subject to change without notice...

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