Mastech MS8269 User Manual Download Page 1

 

   

Content 

   

        Title 

 

Page 

 

1. Overview 

 

 

 

 

1.1 Safety Information 

 

1.1.1 Safety instructions 

 

1.1.2 Safe operation habits 

 

1.1.3 Safety symbols 

 

1.1.4 Safe maintenance habits 

 

1.2 Input protecting measures 

 

 

 

 

2. Descriptions of meter exterior 

 

 

 

 

 
2.1 Exterior of the meter 

 

2.2 LCD 

 

2.3 Function keys 

 

2.4 Input sockets 

 

 

2.5 Accessories 

 

 

 

 

 

3. Instructions for operation 

 

 

 

 

3.1 Routine operation 

 

3.1.1 Mode of data holding 

 

3.1.2 Energy saving function of the battery 

 

 

 

 

3.2 Instructions for measurement 

 

3.2.1 Measuring AC and DC voltages 

 

3.2.2 Measuring resistance 

 

10 

3.2.3 Diode measurement 

 

11 

Ⅰ 

 

   

Content 

   

        Title 

 

Page 

 

3.2.4 Humming ON/OFF test 

 

11 

3.2.5 Measuring capacitance 

 

12 

3.2.6 Transistor measurement 

 

12 

3.2.7 Measuring inductance 

 

13 

3.2.8 Measuring temperature 

 

13 

3.2.9 Measuring current 

 

14 

 

 

 

4. Technical parameters 

 

15 

 

 

 

4.1 General parameters 

 

15 

4.2 Precision parameters 

 

16 

4.2.1 DC voltage 

 

16 

4.2.2 AC voltage 

 

16 

4.2.3 Transistor 

 

16 

4.2.4 Resistor 

 

17 

4.2.5 Diode 

 

17 

4.2.6 Humming ON/OFF 

 

17 

4.2.7 Capacitance 

 

17 

4.2.8 Inductance 

 

18 

4.2.9 Temperature 

 

18 

4.2.10 DC current 

 

18 

4.2.11 AC current 

 

18 

 

 

 

5. Meter maintenance 

 

19 

 

 

 

5.1 Routine maintenance 

 

19 

5.2 Replacing the battery 

 

19 

 

Summary of Contents for MS8269

Page 1: ...asurement 9 3 2 1 Measuring AC and DC voltages 9 3 2 2 Measuring resistance 10 3 2 3 Diode measurement 11 Ⅰ Content Title Page 3 2 4 Humming ON OFF test 11 3 2 5 Measuring capacitance 12 3 2 6 Transistor measurement 12 3 2 7 Measuring inductance 13 3 2 8 Measuring temperature 13 3 2 9 Measuring current 14 4 Technical parameters 15 4 1 General parameters 15 4 2 Precision parameters 16 4 2 1 DC volt...

Page 2: ...e equipments Attention for example measurements conducted on home appliances portable instruments and similar equipments Measurement Category Ⅰ CAT Ⅰ is measurements conducted on circuits which are not directly connected to the bus Attention for example measurements conducted on circuits not directly connected to the bus and on certain internally protective branch circuits of the bus for the latte...

Page 3: ...uit to be measured After the measurement is completed please first disconnect the red test tip then the black common test tip Please make sure that the measuring tips are not connected to the circuit to be measured before switching the measuring range For range selection related with all DC functions including both manual or automatic range selection in order to prevent the danger of electric shoc...

Page 4: ...turn off all related power supply and make sure that you are not carrying static charge before taking off the shell or part of the shell of the meter in order to avoid damaging parts of the meter Only technicians who have complete knowledge of the meter and the danger of electrical shock are permitted to perform the following operations meter calibration maintenance and service etc After taking of...

Page 5: ...ance inductance temperature or mA level of current or conducting hFE tests on transistors protect the meter with the self recovery fuse F500mA 250V 4 2 Descriptions of meter exterior 2 1 Exterior of the meter 1 LCD 2 Function Keys 3 Rotary switch 4 Input socket 5 2 2 LCD Please refer to Table 1 for information related with the display ...

Page 6: ...nder the mode of ON OFF test The meter is under the mode of capacitance and inductance measurement 6 Table 1 Displayed symbols Continued The meter is under the mode of data holding degree Celcius Unit of temperature V mV V mV Volt Unit of voltage milli volt 1x10 3 or 0 001 Volt A mA A mA Ampere Unit of current milli ampere 1x10 3 or 0 001 ampere Ω Ω Ω Ω kΩ Ω Ω Ω MΩ Ω Ω Ω Ω kΩ MΩ Ohm Unit of resist...

Page 7: ...t terminal for voltage resistance and diode measurements or humming ON OFF test to be connected to the red measuring tip Positive input terminal for measuring current mA capacitance inductance temperature and hFE of transistors to be connected to the red measuring tip or output plug of the dedicated multi functional test sockets 10A Positive input terminal for 10A current to be connected to the re...

Page 8: ...tips which are in parallel with the circuit to be tested 4 Read the measured voltage from LCD When measuring DC voltages the display will also output the polarity of the voltage on the red measuring tip Attention With the measuring ranges of DC 200mV and AC 2V the meter will display a certain value even though the measuring tips are not connected In this case short out the V Ω and COM ends for a s...

Page 9: ...ing which is normal for measuring values of high resistance If there is no input e g in the case of an open circuit the display outputs 1 which means that the measured value exceeds the range 3 2 3 Diode Measurement In order to prevent the meter or the equipment to be measured from being damaged always turn off all power supplies for the circuit to be measured and discharge all high voltage capaci...

Page 10: ...CX input socket You can also use the dedicated multi functional test sockets to measure capacitance 3 Measure the capacitance of the capacitor to be tested with the other ends of the test tips and read the measured value from LCD The following are some tips for measuring capacitance When conducting measurements on capacitors with high capacitance with this meter it takes some time to obtain a stab...

Page 11: ...re or being damaged Measuring temperatures 1 Set the rotary switch at the position of and LCD will output the value of the ambient temperature 2 Properly connect the multi function test sockets to the meter terminal plug of the dedicated multi function test sockets is connected to the terminal and COM plug is connected to the common terminal 3 Properly plug the Type K thermoelectric couple to the ...

Page 12: ...the display only outputs 1 which means that the input exceeds the selected range the rotary switch should be set at a higher range 6 Turn off the power supply for the circuit to be tested and discharge all high voltage capacitors and then disconnect the test tip of the meter and restore the circuit to its original state 14 4 Technical Parameters 4 1 General parameters Surrounding conditions for op...

Page 13: ... effective value for the range of 200mV DC 250V or ac effective value Frequency response 40Hz 400Hz 40 200Hz for the range of 750V sine wave effective value mean value response 4 2 3 Transistor Range Description Test condition hFE The display outputs the approximate value of hFE 0 1000 The base current is about 10 μA and Vce is about 2 8V Overload protection self recovery fuse F500mA 250V 16 4 2 4...

Page 14: ...ion self recovery fuse F500mA 250V No fuse protection for the range of 10A Max input current mA DC 200mA or AC effective value 10A DC 10A or AC effective value When measuring current which is greater than 5A do not conduct measurements consecutively for more than 4 minutes After the measurements are completed do not conduct new current measurements until 10 minutes later 4 2 11 AC Current Range Re...

Page 15: ... a new cotton stick with cleaner or lubricant e g WD 40 Clean every socket with the cotton stick and the lubricant can prevent the sockets from contamination caused by high humidity 5 2 Replacing the Battery In order to avoid electric shock or physical hurting due to wrong readings please replace the battery immediately when symbol appears on the display of the meter In order to avoid electric sho...

Page 16: ...6 Put a new 9V 6F22 battery in place 7 Put the battery cover in place and tighten the screws 20 ...

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