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Digital Multimeter Operation 

Manual 

 

I. General 

This  is  a  steady  performance,  high 

security  3  1/2  digital  multimeter.  It  uses  LCD 

with  18.9mm  high  figure  to  make  the  reading 

clear. 

The digital multimeter has the function of 

measuring ACV, DCV, ACA, DCA, Resistance, 

Celsius  &  Fahrenheit  Temperature,  Diode, 

Continuity. The instrument also has the features 

of  Unit  Symbol  Display,  Auto/Manual  Range 

Selection,  Auto  Power  Offer  and  Alarm 

Function.  It  adopts  the  directly  driven  8  digits 

Summary of Contents for 297030

Page 1: ...9mm high figure to make the reading clear The digital multimeter has the function of measuring ACV DCV ACA DCA Resistance Celsius Fahrenheit Temperature Diode Continuity The instrument also has the f...

Page 2: ...d most suitable for lab factory maintenance and repair users II Open Package Inspection Open the gift box and take out the instrument carefully check the following accessories If any accessory is miss...

Page 3: ...e electric shock when measuring voltage higher than 36V DC 25AC current higher than 10mA AC power line with inductance load and AC power line during the power fluctuation 2 Before measuring should che...

Page 4: ...rmed one Only replace it by the same type and specification fuse Before replacement should keep the test leads off the tested point to make sure there is no any signal at the input terminal 5 Do not r...

Page 5: ...ground potential Usually use the dry cloth rubber overshoes rubber cushion and other insulated materials to keep the body isolated with the ground 7 Do not store and use the instrument in high humili...

Page 6: ...ied to void the electric shock and instrument damage 9 Do not measure any voltage when connecting the test leads with the current terminal to avoid damaging the instrument and endangering the safety o...

Page 7: ...put terminal Do not switch the function range selection knob when measuring 12 When LCD displays please replace the batteries in time to make sure the measuring accuracy 13 Do not allow to measure the...

Page 8: ...7 15 Safety Symbol Description Warning DCA High Voltage Dangerous ACA GND DCA ACA Dual Insulation Meets the direction of European IEC Low Battery Fuse...

Page 9: ...Function Button 3 1 MAX Max Value Hold Press the button the reading is renewed and the max value is held on LCD 3 2 SELECT Function Switch Press the button DC AC mode performance switch 3 3 HOLD Data...

Page 10: ...o the lowest one when measuring the highest range the cycle is in proper order from low to high Keep pressing the button for 2 sec return to Auto Range mode 4 Knob Switch Change the measuring function...

Page 11: ...unction button or change the knob switch the instrument will get into the auto power on mode working mode the auto power offer mode will be cancelled by pressing the HOLD button to turn on the instrum...

Page 12: ...pearance 1 7 Operation Environment 0 40 Relative Humidity 80 1 8 Storage Environment 0 50 Relative Humidity 80 1 9 Power 2pcs 1 5V batteries AAA 7 battery 1 10 Dimension size 145 74 36mm 1 11 Weight A...

Page 13: ...idity 75 One year calibration guarantee since the time dispatched from the factory 2 3 1 DCV 1 Insert the red and black test leads separately to mA V and COM input terminals 2 Turn the knob switch to...

Page 14: ...it displays AUTO symbol Press RANGE button to switch to Manual range mode can select 200mV 2V 20V 200V 600V Range 6 Connect the test leads to the tested point the voltage and polarity of point connect...

Page 15: ...00V Otherwise there is the danger to damage the instrument 3 When measuring the high voltage caution to avoid the body touches the high voltage Range Accura cy Resolution 200mV 0 5 4d 100uV 2V 1mV 20V...

Page 16: ...ch to ACV measurement mode 3 This range is 200mV The reading to measure the voltage less than 200mV is much accurate and stable than the reading measured in the Range 4 Turn the knob switch to Range 5...

Page 17: ...ge mode if OL is displayed on LCD it indicates the tested voltage value has exceeded the present range limit please select the higher range to complete the measurement 2 Do not measure the voltage hig...

Page 18: ...M at other ranges Overload Protection 600V DC or 600V AC Peak Value Frequency Response 50 200 Hz Display Average value response RMS of sine wave Range Accuracy Resolution 200mV 1 5 20d 100uV 2V 0 8 6d...

Page 19: ...o Current Range press SELECT button to switch to DCA measurement mode Connect the test leads to the tested point in series the current value and polarity of point connected by red lead will be display...

Page 20: ...e present range limit please select the higher range to complete the measurement 3 Max input value is 200mA or 10A Depending on the terminal the red test lead is inserted The input value is exceeding...

Page 21: ...ACA 1 Insert the black test lead to the COM input terminal and red test lead to mA V input terminal max 200 mV or 10A input terminal max 10A 2 Turn the knob switch to Current Range press SELECT button...

Page 22: ...of tested current and then select the proper range based on displaying value 2 If OL is displayed on LCD it indicates the tested current value has exceeded the present range limit please select the hi...

Page 23: ...uA 20mA 10uA 200mA 100uA 10A 2 5 15d 10mA Max measurement voltage drop Full Range mA is 1 2V A is 100mV Max input current 10A less than 15 seconds Overload Protection 0 2A 250V restorable fuse 10A 250...

Page 24: ...please short circuit the test leads at first to test the wire resistance and then deduct it from the actual resistance Note 1 Firstly users should select the auto range mode if users had no idea abou...

Page 25: ...make the reading stable it is normal when measuring the high resistor 3 When the input terminal is open circuit it will display OL 4 When measuring in line resistor be sure that the power is off and...

Page 26: ...s at first to test the wire resistance and then deduct it from the actual resistance 2 3 6 Diode and Continuity Test 1 Insert the black test lead to COM terminal and the red test lead to mA V terminal...

Page 27: ...asurement the red test connect to diode positive polarity the black test lead to diode cathode polarity the LCD displays OL 5 The complete diode testing includes forward and backward measurement if th...

Page 28: ...t is Approx 0 5mA Backward Voltage is Approx 1 5V Buzzer makes a long sound while resistance is less than 50 Open circuit voltage is Approx 0 5V Overload Protection 250V DC or AC Peak Value CAUTION DO...

Page 29: ...e measurement end of thermocouple on the surface or inside the object to be tested Then you can read temperature from the screen and the data is in Centigrade Note 1 When the input terminal open circu...

Page 30: ...NOT INPUT VOLTAGE AT THIS RANGE VIII Instrument Maintenance Instrument is a high accuracy instrument please don t modify the circuit 1 Keep the instrument away from water dust and shock 2 Do not store...

Page 31: ...ke out the battery to avoid leakage 5 When symbol displays should replace the battery following the steps 5 1 Unlock the screw and remove the battery case 5 2 Take out the old battery and replace the...

Page 32: ...instrument when the battery isn t installed or the back case isn t firm 4 When replacing battery or fuse please take away the test leads from the measured point and power off at first IX Fault Elimin...

Page 33: ...ct to change without notice The content of this manual is regarded as correct error or omits Pls contact with factory We hereby will not be responsible for the accident and damage caused by improper o...

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