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01

02

1. Safety Information

1.2 Use

To reduce the risk of electrical shock, product damage 
or personal injury, please follow the safety instructions
 described in the user manual. read the user manual 
before using the meter.

This instrument meets GB/T 13978-92 and 
GB4793.1-2007 (IEC-61010-1,IEC-61010-2-032)
standards for safety requirements for electronic testing 
instruments,pollution degree 2,And

 

over

 

voltage

 

rating

 

of CAT III 1000V and CAT IV 600V.
Follow all safety instructions to ensure safe use of the 
instrument.Proper use and protection of the meter will 
ensure long life of the meter.

1.1 Preparation

1.1.1 

          - 

 

          - 
1.1.2 

When using the meter, follow the following 

          safety rules:

Always take precaution to prevent electrical shock

Never misuse the instrument

Check to see if the meter or any components were

          damaged during shipment.

Check the meter and accessories thoroughly 

          before using.

Inspect test leads and probes for cracks, breaks or 

          crazes on the insulation before using the meter.

Use test leads provided with the unit.If necessary,

          replace test leads with identical specifications.

1.1.3 

1.1.4 

1.1.5 

1.2.1 

1.2.2 

1.2.3 

1.2.4 

Turn the rotary switch to the required function and 

          range to be measured.

When using the CAT 

 environment, if the 

          measuring voltage between terminals and earth 
          ground exceeds 600V, CAT III environments or 
          voltage measurement between the terminal and 
          the earth more than 1000V, do not measure voltage.

Always be careful when working with voltages above 

          60V DC or 30V AC RMS. Keep fingers behind the 
          probe barriers while measuring.Never touch probes 
          during measurement.

Choose the highest range when the value to be 

          measured is unknown.
1.2.5 Remove test leads before switching functions on 
          the rotary switch.
1.2.6 Do not perform resistance, capacitance, diode and 
          continuity measurements on powered circuits.
1.2.7 Never connect the test leads across a voltage 
          source while the rotary switch is in the resistance, 
          diode or continuity mode. Doing so can damage 
          the meter.
1.2.8 Power off the circuit and discharge capacitors 
          before testing capacitance.
1.2.9 Do not place the meter in any environment with 
          high pressure, high temperature, dust, explosive 
          gas or vapor.
1.2.10 Stop using the meter if any failure or abnormal 
            function is observed.
1.2.11 Do not use meter unless battery cover is in place 
            a secured.
1.2.12 Avoid direct sunlight, exposing batteries to 
            humidity, any strong magnetic field, or high 
            temperatures to ensure the extended life of the 
            meter. 

Warning

Содержание MS8251A

Страница 1: ...MS8251A REL MAX MIN AUTO kHz nmF Hz kM C F mVA 0 10 20 30 40 50 60 66 MS8251A DIGITAL MULTIMETER OPERATION MANUAL CAT III 1000 V CAT I V 600 V ...

Страница 2: ...ry switch to the required function and range to be measured When using the CAT Ⅳ environment if the measuring voltage between terminals and earth ground exceeds 600V CAT III environments or voltage measurement between the terminal and the earth more than 1000V do not measure voltage Always be careful when working with voltages above 60V DC or 30V AC RMS Keep fingers behind the probe barriers while...

Страница 3: ... test frequency and duty cycle Auto and manual range Auto power off Max measurement Min measurement Relative measurement Reading Hold function Average commutation Simultaneously display frequency during AC voltage current measurements Non contact voltage test Meter complies with European Community EU standards Earth Ground 2 1 Components 1 2 3 4 Non contact voltage detection indicator LCD screen F...

Страница 4: ...n on off backlight EMP position thermocouple temperature measurement turn off meter Temp V Hz jack voltage current resistance capacitance diode continuity frequency duty cycle temperature input terminal jack common input terminal µAmA jack current measurements 600mA 10A jack current measurements 600mA to 10A 2 3 LCD display REL MAX MIN AUTO kHz nmF Hz kM C F mVA 0 10 20 30 40 50 60 66 2 3 4 5 6 1 ...

Страница 5: ...surement environment for 1000VDC or AC RMS 3 1 4 Maximum working height 2000m 3 1 4 Maximum working height 2000m 3 1 5 Display LCD 3 1 6 Maximum display value 6599 3 1 7 Polarity indication indicates negativepolarity 3 1 8 Overload indication 0L or 0L 3 1 9 Sampling frequency 0 4s digital display 0 04s bar graph For current readings 1s digital display 0 1s bar graph 3 1 10 Units display functions ...

Страница 6: ...gits 660mV 0 001V 0 01V 0 1V 1V 6 6V 66V 660V 1000V 0 5 reading 5 digits of Resolution Accuracy range 0 8 reading 3 digits of 3 2 4 AC Voltage Frequency Range 40 60Hz 40 400Hz 40 400Hz Input impedance 10MΩ Overload protection 660mV range 250V DC or AC RMS 6 6V 1000V range 1000V DC AC RMS Maximum input voltage 1000V AC RMS Response Average calibrated in rms of sine wave 0 1mV 1 5 reading 5 digits o...

Страница 7: ... 1 0V Overload protection 250V DC AC rms If measured resistance is less than 50Ω a buzzer will sound 0 1Ω Resolution Function range Range 10Hz 10kHz Input Voltage 0 2V AC Input voltage should increase along with the frequency 3 2 9 Frequency 3 2 9 1 Frequency V position 66Hz 1 5 reading 5 digits 660Hz 6 6kHz 10kHz 0 01Hz 0 1Hz 0 001kHz 0 01kHz Resolution Accuracy range 66Hz 1 5 reading 5 digits 66...

Страница 8: ... 3 2 12 Temperature 4 Using the Meter 4 1 Data Hold 4 2 1 Note In voltage current resistance and capacitance modes the default range is AUTO 4 2 2 Press RANGE to enter manual ranging Each press switches to a higher range Pressing the button at the highest range will return to the lowest range 4 2 3 Hold RANGE to return to AUTO 4 2 4 Pressing RANGE in Max Min mode will return the meter to normal re...

Страница 9: ...itch between C and F 4 6 1 Press to turn on backlight Press again to turn off Note 1 Even though there is no indication voltage may still exist Do not rely solely on NCV detector to determine the presence of voltage in a wire The measurement may be affected by the design of the outlet type of insulation and other external factors 2 The voltage sensing indicator may turn on when a voltage is fed to...

Страница 10: ... 3 Connect the test leads to the circuit 4 14 4 The measured frequency and duty cycle will be displayed simultaneously 4 15 Current 4 15 1 Remove power to the circuit and discharge all capacitance 4 15 2 Move the rotary switch to the appropriate position µA mA or A 4 15 3 Connect the black test lead to the COM jack If the current to be measured is 600mA connect the red test lead to the µAmA jack I...

Страница 11: ...ical or compatible leads lead spec 1000V 10A Replace test leads if leads become worn 6 Accessories Warning 1 Test Leads 1 pair 2 Manual 1 pc 3 Battery 9V 6F22 4 multifunctional test socket 1pc 5 electromagnetic pendant 1pc 6 K type temperature probe 1pc 1 pc 00 05 3589 ...

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