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Tuesday, November 30, 2021

Multimeter use how to test TRANSISTOR and how to test electronic components

Multimeter   use   how   to   test   TRANSISTOR    with    Digital  Multimeter 

TRANSISTOR   TESTING    Transistor has  3 legs , namely ,  base  collector  and   emitter  ,  construction of  transistor has  2 PN junction.   This article  will use diode concept to  conduct  transistor testing.  NPN  transistor  use 2 diode concept to make it  easily to understand  the testing   and  these  diode is  common  anode  connected ( note it is not the actual equivalent circuit  just for testing concept purpose)


Test  Transistor
HOW TO  TEST   TRANSISTOR 

TRANSISTOR
NPN  transistor  use  2 diode to  explain  testing concept .

TRANSISTOR
NPN  transistor  use 2 diode  , common anode , to  explain  testing concept 

TRANSISTOR
NPN  Transistor  Symbol 
TRANSISTOR
PNP  transistor  use  2 diode to  explain  testing concept .

TRANSISTOR
PNP  transistor  use 2 diode , common cathode , to  explain  testing concept .


TEST   TRANSISTOR
PNP    transistor   symbol 



Step to test  transistor  using  digital Multimeter
(  use Diode Function )
1. Find transistor leg function from its datasheet.
2. Set  digital multimeter to  diode  test  function.

3. Test  B and C leg.  connect test leads  and test  ,then  switch test  lead and do testing again.
Good transistor will  show  voltage  0.4-0.8V    1  time  and  show  "OL"    1 time.
Bad transistor ( open ) will show  "OL "    2 time.
Bad transistor  ( shorted)  will show  "000V"   2 time.

TEST   TRANSISTOR
B-C  leg  testing , Good transistor will show 0.4-08V   1  time


Test  Transistor
B-C  leg  testing  , Good transistor will show  "OL"     1  time. 

4. Test  B and  E leg.  connect test leads  and do testing  ,then  switch test leads  and do testing again.
Good transistor will show  voltage  0.4-0.8V    1 time and  show  "OL"   1 time.
Bad transistor ( open ) will show  "OL"    2  time.
Bad transistor  ( shorted)  will show  "000V"  2 time.
5. Test  C and E leg.  connect test leads  and test  ,then  switch test leads and  test.
Good transistor will show     "OL"  2  time.
Bad transistor ( shorted)  will  show    "000V"  2  time.


electronic  components  testing
C-E  leg  testing  , Good transistor will show  "OL"    2   time. 



Step to test  transistor using   digital Multimeter 
( use resistance test function )
1. Find transistor leg function from its datasheet.
2. Set  digital multimeter to  resistance  test function.
3. Test B and C leg.  connect test leads  and do testing   ,then  switch test leads and do testing.
Good transistor will show   high  resistance    1  time and  show  "OL"  1 time.
Bad transistor ( open ) will show "OL"    2  time.
Bad transistor  ( shorted)  will show  0  ohm   2 time.

HOW TO  TEST   TRANSISTOR    मल्टीमीटर
B-C  leg  testing , good transistor will show  high  resistance   1  time. 


Test  transistor
B-C  leg  testing , good transistor  will  show   "OL"    1 time

4. Test B and E leg.  connect test leads and  do testing  ,then  switch test leads  and  do  testing.
Good transistor will  show   high  resistance    1 time  and  show  "OL"  1  time.
Bad transistor ( open ) will show  "OL"    2  time.
Bad transistor  ( shorted)  will show  0 ohm   2  time.


Test  transistor
B-E  leg  testing , good transistor will show  high  resistance   1 time.



Test  transistor
B-E leg testing , good transistor will show   "OL"    1 time
5. Test C and E leg.  connect test leads  and do testing  ,then  switch test leads  and  do testing.
Good transistor will show     "OL"   2  time.
Bad transistor ( shorted)  will show    0  ohm   2  time.



Test  transistor
C-E leg  testing , good transistor will show   "OL"    2 time


Test  transistor
C-E leg  testing  , good transistor will show   "OL"    2 time