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MY-65 4 1/2-DIGIT DIGITAL MULTIMETER 

Users Manual 

 

 

 

Read the Users Manual thoroughly before use. 

WARRANTY 

This instrument  is warranted to be  free from defects in material and workmanship for a period of 

one  year.  Any  instrument  found  defective  within  one  year from the  delivery  date  and returned  to 

the factory with transportation charges prepaid, will be repaired, adjusted, or replaced at no charge 

to the original purchaser. This warranty does not cover expandable items such as batteries or fuses. 

If  the  defect  has  been  caused  by  a  misuse  or  abnormal  operating  conditions,  the  repair  will  be 

billed at a nominal cost. 

SAFETY INFORMATION 

UT30B  digital  multimeter  has  been  designed  according  to  IEC-1010  concerning  electronic 

measuring instruments with an overvoltage category (CAT

) and pollution2. 

Full compliance with safety standards can be guaranteed only with test leads supplied. If necessary, 

they must be replaced with the type specified in the manual. 

ELECTRICAL SYMBOLS 

                    AC (Alternating Current) 

                    DC (Direct Current) 

                    Important safety information. Refer to the manual. 

                    Dangerous voltage may be present. 

                    Earth ground 

                    Fuse 

                    Conforms to European Union directives 

                    Double insulated 

WARNING 

To avoid possible electric shock or personal injury, follow these guidelines: 

Do  not  use  the  meter  if  it  is  damaged.  Before  you  use  the  meter,  inspect  the  case.  Pay 

particular attention to the insulation surrounding the connectors 

Inspect  the  test  leads  for  damaged  insulation  or  exposed  metal.  Check  the  test  leads  for 

continuity. Replace damaged test leads before you use the meter. 

Do not  use the  meter if it  operates abnormally. Protection  may be impaired.  When in  doubt, 

have the meter serviced. 

Do not operate the meter around explosive gas, vapor, or dust. 

Do  not  apply  more  than  the  rated  voltage,  as  marked  on  the  meter,  between  terminals  or 

between any terminal and earth ground. 

Before use, verify the meter

s operation by measuring a known voltage. 

When servicing the meter, use only specified replacement parts. 

Use with caution when working above 30V ac rms, 42V peak, or 60V dc. Such voltages pose 

a shock hazard. 

When using the probes, keep your fingers behind the finger guards on the probes. 

Connect  the  common  test  lead  before  you  connect  the  live  test  lead.  When  you  disconnect 

test leads, disconnect the live test lead first. 

Summary of Contents for MY-65

Page 1: ...nual Dangerous voltage may be present Earth ground Fuse Conforms to European Union directives Double insulated WARNING To avoid possible electric shock or personal injury follow these guidelines l Do not use the meter if it is damaged Before you use the meter inspect the case Pay particular attention to the insulation surrounding the connectors l Inspect the test leads for damaged insulation or ex...

Page 2: ...ore attempting to insert transistors for testing always be sure that the test leads have been disconnected from any measurement circuits MAINTENANCE l Before opening the case always disconnect the test leads from all live circuits l For continue protection against fire replace fuse only with the specified voltage and current ratings F 250mA 250V Fast Blown l Periodically wipe the case with a damp ...

Page 3: ... 0 1 3 200V 10mV 0 1 3 1000V 0 1mV 0 15 5 Input impedance 10MΩ Overload protection Range 200mV 250Vdc or ac rms Other ranges 700V rms or 1000V peak AC VOLTAGE Range Resolution Accuracy 50 60Hz Accuracy 40 1000Hz 2V 0 1mV 0 5 10 1 0 10 20V 1mV 0 6 10 1 0 10 200V 10mV 0 6 10 1 0 10 700V 0 1V 0 8 15 1 2 15 Input Impedance 2MΩ Overload protection 700V rms or 1000V peak Indication Average rms of sine w...

Page 4: ...n the test leads is shorted and the number must be subtracted from the reading while making measurement CAPACITANCE Range Resolution Accuracy 2000pF 0 1pF 4 0 10 20nF 1pF 4 0 10 200nF 10pF 4 0 10 2µF 100pF 4 0 10 20µF 1nF 4 0 10 FREQUENCY Range Resolution Accuracy 20KHz 1Hz 1 5 5 Overload protection 250Vac rms Input voltage 200mV 10V rms AUDIBLE CONTINUITY Range Description If the resistance under...

Page 5: ...gnal to avoid interference MEASURING RESISTANCE 1 Connect the red test lead to the VΩHz jack and the black test lead to the COM jack 2 Set the rotary switch to the desired Ω range 3 Connect the test leads to the resistor to be measured and read the value displayed on the LCD 4 While measuring in circuit resistance disconnected circuit power and discharge all high voltage capacitors before measurin...

Page 6: ...t 70Ω the built in buzzer will sound Battery Fuse Replacement If appears on the LCD it indicates that the battery should be replaced To replace the battery open the case and replace the exhausted battery with the ratings specified 9V NEDA 1604 or 6F22 The fuse rarely needs to be replaced and is blown as a result of the operator s error To replace the fuse open the case and replace the blown fuse w...

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