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이  자료는  저작권법에  따라  보호받는  저작물이므로  무단배포  및  무단복제를  금하며,  내용의  전부 
또는  일부를  이용하려면,  반드시  한국  VictorRuoshui  社  의  서면동의를  받아야  합니다.

 

DIGITAL MULTIMETER     

OPERATION MANUAL 

VR-81D

 

I. General 

This  is  equipped  with  the  LCD  display 

of  text  height  18.9mm,  is  a  3  3/4  digital 

multimeter  which  has  the  merits  of  clear 

reading,  stable  performance  and 

high 

reliability.   

It could be used to measure DC voltage, 

AC  voltage,  DC  current,  AC  current, 

resistance,  temperature,  capacity,  frequency  / 

duty  cycle,  diode  and  make  on-and-off  test. 

Meanwhile,  it  is  available  for  unit  symbol 

display,  automatic/manual  range  switching, 

automatic power off  and alarm  function. The 

complete  machine  takes  an  integrated  circuit 

which  can  directly  drive  LCD  8-bit 

microprocessor  and  double-integrating  A/D 

Summary of Contents for VR-81D

Page 1: ...rmance and high reliability It could be used to measure DC voltage AC voltage DC current AC current resistance temperature capacity frequency duty cycle diode and make on and off test Meanwhile it is...

Page 2: ...al tool in laboratory and factory as well as for radio fans and family Open package Inspection Open the package box and take out the meter check carefully if the following accessories are absent or da...

Page 3: ...e first read the safety considerations 1 When DC voltage above 30V AC voltage above 25V current above 10mA AC power line with inductive load or power line during electric fluctuation is measured pleas...

Page 4: ...other unconfirmed or disapproved protector tube to replace the protector tube inside the meter Only the protector tube of the same model or same specification can be replaced Before the replacement t...

Page 5: ...d don t touch uncovered metal terminal output port lead clamp and etc where earth potential may exist Dry clothes rubber shoes rubber cushion and other insulating material are usually used to keep you...

Page 6: ...order to avoid electric shock and the damage to the meter 9 When the test leads is inserted into the current socket don t measure any voltage for fear that the meter should be damaged and the operato...

Page 7: ...to switch the function range selection switch during measurement 12 When is shown on LCD display please replace battery immediately to ensure the measurement precision 13 It is not allowed to insert t...

Page 8: ...t Panel Button Function Description 1 Instrument Model Number 2 LCD Display Display the measured data and unit 3 Function Button 3 1 SELECT function switch Press this button the function could switch...

Page 9: ...the reading is locked Press it again the lock is cleared and enter into normal measurement status 3 4 REL Relative Value Measurement The relative value measurement of all functions could be conducted...

Page 10: ...rature and Input terminal with current less than 400mA V Other Functions Automatic Power off During measurement the meter will automatically shut down enter sleeping mode to save power if function but...

Page 11: ...roperty 1 1 Display LCD 1 2 Max Display 3999 3 3 4 counts automatic polarity display and unit display 1 3 Measuring Method Dual integral A D converter 1 4 Sampling Rage Approx 3 times sec 1 5 Over Ran...

Page 12: ...1 5V batteries 1 12 Accessories Instruction Manual 1 pc Holster 1 pc Outer packing box 1 pc 10A test leads 1 pair K Thermocouple and 1 5V batteries 2 pcs 2 Technical Property 2 1 Accuracy a reading d...

Page 13: ...age and polarity of the point where the red test lead is contacted will be displayed on the screen Caution 1 Don t measure voltage over 600V Otherwise there is a danger of meter being damaged 2 When m...

Page 14: ...ion 600V DC or 600V AC Peak Value 2 2 2 ACV True RMS 1 Insert black test leads into the hole of COM and red one into 2 Rotate function switch to gear press SELECT button to select the AC measurement m...

Page 15: ...voltage over 600V Otherwise there is a danger of meter being damaged 2 When measuring high voltage special attention should be given to personal safety and avoid your body getting in touch with high v...

Page 16: ...nal Max 400mA or 10A input terminal Max 10A 2 Rotate function switch to Current gear The initiate state of the meter is in automatic range status which shows DC symbol Then connect the test leads to t...

Page 17: ...The Max input value is 400mA or 10A Depending on the terminal where the red test lead is contacted Range Accuracy Resolution 400uA 1 0 10d 0 1uA 4000uA 1uA 40mA 10uA 400mA 100uA 10A 1 2 10d 10mA Max m...

Page 18: ...switch to Current gear Press SELECT button to select the AC measurement mode Then connect the test leads to the tested circuit in serial the tested current value and the current polarity of the point...

Page 19: ...he overrated current will lead to fuse melt or even damage the meter Range Accuracy Resolution 400uA 1 5 10d 0 1uA 4000uA 1uA 40mA 10uA 400mA 100uA 10A 2 5 15d 10mA Max measurement voltage drop Full R...

Page 20: ...please short circuit the meter pens at first to test the wire resistance and then deduct it from the actual resistance Caution 1 If OL is displayed on LCD it indicates the tested resistance value has...

Page 21: ...suring in line resistor be sure that the power is off and all capacitors are discharged completely Range Accur acy Resolution 400 0 8 5d 0 1 4k 0 8 4d 1 40k 10 400k 100 4M 1k 40M 1 2 10d 10k Open Volt...

Page 22: ...pen to COM terminal and the red one to terminal The polarity of red test lead is 2 Rotate the Range to gear Press SELECT button to select the Diode measurement mode 3 Forward Measurement Connect the...

Page 23: ...ing includes forward and backward measurement if the result does not meet the above it means the diode is bad 6 Press SELECT button to select the Continuity measurement mode 7 Connect the meter pens t...

Page 24: ...pen circuit voltage is Approx 0 5V Overload Protection 250V DC or AC Peak Value CAUTION DO NOT INPUT VOLTAGE AT THIS RANGE 2 2 7 Capacity C 1 Rotate function switch to gear 2 Insert the black test lea...

Page 25: ...ly discharge the tested capacitor in case it damages the meter 2 When measuring in line capacitor the power should be turned off and all capacitors should be discharged completely 3 It takes about 30...

Page 26: ...COM terminals 2 Rotate function switch to Hz gear Connect test leads and the cable to the signal source or the tested load The tested signal will show on the screen Caution 1 When inputting AC RMS ove...

Page 27: ...e frequency range 4 Don t input voltage of over 250V DC or AC peak value in case it damages the meter Range Accur acy Resolution 1Hz 0 5 10 0 001Hz 10Hz 0 01Hz 100Hz 0 1Hz 1kHz 1Hz 10kHz 10Hz 100kHz 1...

Page 28: ...rminal Then put the working end temperature 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...

Page 29: ...0 5d 400 1 5 15d 1 4 1832 750 0 75 5d 750 1 5 15d 1 Sensor K Type Thermocouple Nickel chromium nickel silicon banana plug CAUTION DO NOT INPUT VOLTAGE AT THIS RANGE VII Instrument Maintenance This is...

Page 30: ...magnetic place 3 Wipe the case with a damp cloth and detergent do not use abrasives and alcohol 4 If the instrument is not operated for a long time please take out the battery to avoid leakage 5 Pay...

Page 31: ...lkaline batteries should be used 5 3 Mount the battery door and tighten the screw Precaution 1 Don t input voltage higher than DC 1000V or AC Peak Value 2 Don t measure voltage at current resistance d...

Page 32: ...olve some general problems If the problems still exist please contact the maintenance center or the distributor Fault Solution No Display Turn on power Replace battery symbol appearance Replace batter...

Page 33: ...e contact the manufacturer The Company shall not be held liable for any accidents and hazards resulted from the mal operations by the user The function elaborated by this Instruction shall not be take...

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