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15

16

Direct Current

Resolution

Accuracy

20mA

200mA

0.1mA

0.01mA

10mA

10A

Measuring range

±(1.0% of r5 digits)

Overload protection: grade mA: Fuse (F200mA/600V)
protection; grade 10A: Fuse (F10A/500V) protection. 
Maximum input current: grade mA: 200mA DC or AC
RMS; grade 10A: 10A DC or AC RMS
When measured current is greater than 2A, the 
continuous measurement time cannot be not more 
than 2 minutes. Disconnect the current and wait 10
minutes before making another measurement.

±(2.0% of r10digits)

Battery Test 

Resolution

Built-in load resistance

12V

9V

0.01V

0.01V

0.001V

1.5V

Measuring range

300

Ω

1.8k

Ω

36

Ω

Overload protection: Fuse (F200mA/500V) protection;

Maintenance

This section provides basic maintenance information,
including instructions for the replacement of fuse and
battery. Do not try to repair the meter unless you are 
an experienced maintenance person with the relevant 
calibration, performance testing and maintenance data.

To avoid injury or damage to the meter, don't wet 
the inner parts of the meter. Before opening the 
case or battery cover, remove the connecting 
cable between the test probe and the input signal.

Warning

General Maintenance

Regularly clean the meter case with damp cloth and
a small amount of detergent. Do not use abrasives or
chemical solvents. If the input jack becomes dirty or
wet, it may affect the measurement readings.

To clean input socket:

        Turn off the meter and pull out all the test probes 
        from the input jack. 
        Remove all dirt from the jacks. 
        Apply detergent or lubricant to a new cotton ball
        (such as WD-40). 
        Clean each jack with a cotton ball and lubricant to 
        prevent contamination by moisture in the socket.

1

2
3

4

Replace Battery

To avoid incorrect readings and possible electric 
shock or personal injury, when “      ” appears on
the meter display, replace the battery immediately. 
To avoid electric shock or personal injury, before 
opening the battery cover to replace battery, turn 
off the meter and make sure that the test probe is 
disconnected from the measurement circuit.

Warning

Содержание MS8239A

Страница 1: ...ual Digital Multimeter HOLD 10A COM MAX 10A 500V MAX 200mA 250V 600V MAX 600V CAT III IEC61010 1 BATT A V V 200 600 20m 200m 10A 200 2k 20k 200k 2M 2 20 200 600 200m 9V 1 5V 12V MS8239A Auto Power Off DIGITAL MULTIMETER ...

Страница 2: ...C AC Voltage Measurement 7 7 DC Current Measurement Resistance Measurement 8 9 Continuity Measurement 10 Diode Test 10 Battery Test 11 General Specifications 11 Accuracy Indicators 12 DC Voltage 13 AC Voltage 13 Resistance Measurement 14 Diode 14 Continuity Measurement 14 DC Current 15 Battery Test 15 Maintenance 15 General Maintenance 16 Replace Battery 16 Replace Fuse 17 ...

Страница 3: ...ranty for the meter may become invalid The warnings in the user manual are used to remind users of possible dangers or dangerous actions The notes in the user manual are to remind users of conditions or actions that may cause damage to the measured object Check the case before using the meter Don t use the meter with damaged case Check to see if the case is cracked or lacks plastic parts Please pa...

Страница 4: ...t DC voltage measuring range equal to or greater than the AC measuring range Before measuring current please check the meter fuse shut off power to the circuit to be tested then connect the meter and energize the circuit When opening the case or part of the case turn the meter off When the battery low voltage indicator becomes lit replace the battery at once A low battery will cause meter reading ...

Страница 5: ... current diode continuity and battery test connected with the red test probe Meter Instructions Meter Appearance Display 1 Battery low voltage indicator 2 Data hold indicator 3 Numerical value display 4 Numerical value polarity indicator negative sign HOLD 10A COM MAX 10A 500V MAX 200mA 250V 600V MAX 600V CAT III IEC61010 1 BATT A V V 200 600 20m 200m 10A 200 2k 20k 200k 2M 2 20 200 600 200m 9V 1 ...

Страница 6: ...RMS voltage higher than 600V DC or AC to prevent injury or damage to meter and equipment Warning Turn off the power to the circuit to be tested Discharge all the high voltage capacitors on the circuit to be tested Rotate the function selection switch to the appropriate DC current position Depending on the size of the current to be measured connect the red test probe to 10A or mA input jack connect...

Страница 7: ...nd read the resistance value of the short circuit This resistance value should be subtracted after measuring the resistance to be tested When there is no input for example open circuit the display will show 1 which means that the measured value is out of range When measuring resistance or circuit continuity to avoid injury or meter damage turn off the power to the circuit and discharge all capacit...

Страница 8: ...lectric shock or meter damage General specifications Warning Operating environment and condition 600V CAT III pollution grade II Elevation 2000 m 1 2 3 4 Environmental temperature and humidity 0 40 C 80 RH do not use meter when temperature 10 C Storage temperature and humidity 10 60 C and 70 RH remove the battery Temperature coefficient 0 1 Accuracy C 18 C or 28 C The maximum allowable voltage bet...

Страница 9: ...sine wave RMS average response Measuring range 1 2 of reading 10 digits Resolution Accuracy 200Ω 2kΩ 0 1kΩ 0 001kΩ 0 1Ω 0 01kΩ 0 001MΩ 20kΩ 200kΩ 2MΩ Measuring range 0 8 of reading 5 digits Overload protection 250V DC or AC RMS 2V Forward DC current about 1mA Reverse DC voltage about 2 5V Display approximation of diode forward voltage drop Diode Measuring range Function Test Environment Resolution...

Страница 10: ...testing and maintenance data To avoid injury or damage to the meter don t wet the inner parts of the meter Before opening the case or battery cover remove the connecting cable between the test probe and the input signal Warning General Maintenance Regularly clean the meter case with damp cloth and a small amount of detergent Do not use abrasives or chemical solvents If the input jack becomes dirty...

Страница 11: ...tions Replace the battery cover and tighten the screws 1 2 3 4 5 6 7 To avoid electric shock or personal injury before opening back cover to replace fuse turn off the meter and disconnect the test probe from the measurement circuit Warning To replace fuse Turn off the power to the meter Remove all test probes from the input jacks Loosen screws on the back cover with screwdriver Remove the back cov...

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