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
||||||||||||
(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
