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Alternative voltage measurement 

1. 
 
2. 

Place  the  red  probe  into  the 

V.

.  mA

”  jack  and  the 

black probe in

to the “

COM

” jack. 

Turn  the  switch  to 

V~

  and  connect  the  probe  to  the 

power supply or load to be measured. 

Note:  Refer  to  point  1,  2,  3  and  4  for  direct  current 
voltage measurement. 

 

Resistance measurement 

1. 
 
 
2. 
3. 

Place  the  back  probe  into  the 

COM

”  jack  and  red  one 

into the 

V/ 

/ HZ

” jack. 

Turn  the  switch  to  the 

COM

”  jack,  and  connect  the 

probe  to  the  resistor  being  measured  and  read  the 
result on the display.   

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Diode measurement 

1. 
 
 
2. 
 
 
 
 

Insert 

the black lead to the “

COM

” jack the red one into 

the “

V.

.mA

” jack. 

Connect  the  red  test  lead  to  “V.

.mA”  jack  and  the 

black  Turn  the  switch  to  the 

  range,  and  connect 

the  red  probe  to  the  positive  pole  of  the  diode  being 
measured and the black one to the negative  pole,  read 
the  approximate  forward  voltage  drop  of  the  diode  on 
the display.   

 
 
 

Notice 

1. 

If the resistor being measured is greater than the maximum 
value of the selected range, the display will show 

“1”, 

requiring the selection of a higher range. It normally takes a 
few seconds for the reading to get stable when measuring a 
resistor larger than 1M

.   

2. 

In default of input, for instance, open circuit, the display 
shows 

“1”.   

3. 

When measuring an online resistor, de-energized the 
circuit being measured and discharged capacitors.   

Summary of Contents for MAS830

Page 1: ...MAS830L MAS830 MAS830B MAS838 Instruction Manual DIGITAL MULTIMETER ...

Page 2: ...ection of an overload protection circuit making it a superior and handy instrument It can be used to measure DC and AC voltage DC current resistance diodes transistors temperature and for in circuit continuity test Measurement features of the types of this series Features MAS 830L MAS 830 MAS 830B MAS 838 Alternating Voltage measurement V Direct Voltage measurement V Direct Current measurement A R...

Page 3: ...ch is used to select functions and desired ranges as well as to turn on off the meter 4 Hold function When this button is pushed the display will keep the last reading and symbol will appear on the LCD until pushing it again 5 10A jack Plug in connector for red test lead for 10A measurement 6 COM jack Plug in connector for black negative test lead 7 V mA jack Plug in connector for red positive tes...

Page 4: ...FRONT PANEL 3 ...

Page 5: ...to damage the replacement must be of the same type or the same electrical specifications Do not exceed the input limit specified for each range When the instrument is measuring do not touch the input terminal not in use When a measurement range is uncertain turn the function range switch to the maximum range position Before turning the function range switch make sure the probe is open with the cir...

Page 6: ...k and the screws are tightened Clean the housing of the instrument only with a wet rag dripped with little detergent but never chemical solution In case of the any abnormality stop using it and sent it for maintenance Technical data Accuracy of reading 5 digits one year warranty Ambient temperature 18 to 28 Ambient humidity 80 General features Maximum voltage between terminals and earth ground CAT...

Page 7: ...10 A 1 of rdg 5 digits 200mA 100 A 1 5 of rdg 3 digits 10A 10mA 3 of rdg 10 digits Overload Protection F1 200mA 250V Fuse F2 10A 250V MAS838 no 20 A positon Alternative voltage measurement Range Resolution Accuracy 200V 100mV 1 2 of rdg 10 digits 600V 1V 1 2 of rdg 10 digits Overload Protection 600V dc or rms Frequency range 40Hz to 400Hz Display Average effective value of sinusoid RESISTANCE Rang...

Page 8: ...s Notices before operation 1 Plug the instruction check the 9V battery if it is slow the symbol will display requiring battery replacement Otherwise follow the steps below 2 The besides the probe jack indicates that the input voltage or current should not exceed the specified limits to protect the internal circuit 3 Before measurement turn the function range switch to the desired range Direct volt...

Page 9: ...il satisfactory resolution 2 If the display shows 1 this indicates an overrange measurement and the switch should be set to a higher range 3 The symbol beside the probe indicates the maximum input current is 200mA or 10A depending on the inserted jack Overcurrent will blow the fuse Notice 1 If you do not know the measured voltage range in advance set the function range switch to the maximum range ...

Page 10: ...COM jack the red one into the V mA jack Connect the red test lead to V mA jack and the black Turn the switch to the range and connect the red probe to the positive pole of the diode being measured and the black one to the negative pole read the approximate forward voltage drop of the diode on the display 9 Notice 1 If the resistor being measured is greater than the maximum value of the selected ra...

Page 11: ...el with two points is less than 100 the built in buzzer will beep to indicate the continuity between the two points Temperature measurement 1 2 Turn the switch to the position and insert the black probe of the thermocouple sensor into COM jack the red one into the V mA jack Place the operating terminal temperature measured and directly read the temperature value in on the display When the switch i...

Page 12: ...d after replacing battery or fuse Attachments Instruction manual one copy Probe one pair Package one piece 9 V battery NEDA 1604 6F22 one provided in the multimeter K thermocouple sensor one piece MAS838 only Rubber case optional 11 WARNING To avoid electric shock make sure the probe are disconnected from the measured circuit before removing the rear cover Make sure the rear cover is tightly screw...

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