Multimeter

MULTI METER

An instrument or Electronic device to measure current, voltage, resistance any of Electronic Items

 Type of Multi Meter

1.  Analog  Millimeter              2.Digital Millimeter

• We can not read accurate measurement                    * Accurate
• Cannot check high ampere                                          * Check or Indicate High Voltage 
• Static voltage cannot be measured                              *Static Voltage measured 

Analog Multi Meter

Multi-Meter also was known as volt ohm millimeter (VOM), Analog multimeter older but still used. Analog multimeter not gives accurate result and not proper work in high voltage.

Measurement of Analog Millimeter

               

                10kà 0 Ω to 10K

   

Ω             1Mà10 KΩ to 10M Ω

                    0.25à    0 milli  Amp to .25 MA

DCMA         10à      .25     Milli      to 10milli

                   250à    10     million       to 250 million

   DCA       10à  0 to 10

    DC        50à  10 to 50

    Volt     250à50 to 250

                1000à250 to 1000

ACV           10à  0      to   10

                 1000à250 to 1000

   250à50    to 250

          500à250   to 500

          1000à500 to 1000

Digital Multi Meter

Digital multimeter digital form of multimeter . Give accurate result and easily understand the result of a test.

Measurement Digital Multi Meter

ACV Volt    200à0   V TO 200V

                750à200V TO 750V

DC Volt     200mà0v TO 200MILLIVOLT

               2000Mà200MILI  TO 2000MILI

                20Kà1VOLT  TO 200V

               200Kà20V TO 200V

                1000Kà200V TO 100V

Ω    200àOΩ TO 200 Ω

               2000à200Ω TO 200 Ω

               20Kà2K TO 20K

               200Kà20K TO 200K

               200Kà200K TO  200K

             Diode & Transistor

HEF       Only Transistor

 

10A      Dc 1A TO 10A

HOW TO CHECK

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 (Voltage/Resistance/Capacitor/Transistor/Diode) 

In Analog Multi meter:

Voltage

Start with maximum if unknown

• If reading according to range then value otherwise go to  accurate.  

Resistance

ü Start with max[1MΩ].

ü Start the red & black card then (adjust 0Ω).

ü If value then reading.

ü If reading goes to 0 then decrease range (go to 10K)

ü Again adjust 0Ω

ü Insert deeply

Capacitor      [Range 1MΩ]

ü Short the  A & B point

ü Check continuity(A&B)

ü Full àdecrease value increase

ü Short  A & B point

ü Check continuity (B& A)

ü Full à decrease

Transistors

1       2  3                           B& R

                                          1& 2 àok

                                        3 & 2à ok

Diode

 -        +

1             2                         1& 2 àOK

                                         2&1àNot Ok

Warringà

         (1)do not measure high volt or AMP on a low range

                (2)       do not check ampere more than 2 sec

In Digital Multi meter:

# ContinuityàRange [200KΩ]

# Transformerà Range [2000KΩ]

#Voltage  àRange [2000KΩ]

# Capacitor àRange [200KΩ]   Reading will be increased

#TransistorRange [range]

# Diode Same process

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