Multimeter use how to test SCR electronic components testing

Multimeter   use   how   to   test     SCR   Digital multimeter or Analog Multimeter

SCR   TESTING    SCR  has  3 legs , namely ,  Anode  Cathode  and Gate ,  we can use both Digital multimeter and  Analog Multimeter  to test SCR.   This article will present  the step to test.  The sample SCR to test on this article has pin function  K   A   G   ( terminal 1  2  3  respectively ) , the  SCR  part number is   TYN610.

                                  HOW  TO  TEST    SCR

                                Sample  SCR   has  K  A  G  ( pin 1 2 3 respectively )

Step  to  test  SCR with   Digital multimeter.
1. Take part number to find leg function from datasheet.
2. Set digital multimeter to  resistance test function.
3. Connect test lead to  A and  K leg.
4. Test A and K leg  then switch the test leads   and   do   testing  again.

Good SCR will  show   high resistance as Mega ohm value ,for the first and the second  measurement
Bad  SCR  (shorted )  will  show  0  ohm or   low  resistance   2   time.

Test A and K leg , Good SCR will show  high resistance as Mega ohm. 

Test A and K leg ( reverse test lead) , Good SCR will show  high resistance as Mega ohm 

5. Test A and G leg  then switch the test leads  and do  testing again.
Good SCR will show  high resistance as Mega ohm value ,for the first and the second  measurement
Bad SCR ( shorted ) will show  0  ohm  or   low  resistance   2 time.

Test A and G  leg , Good SCR will show  high resistance as Mega ohm

Test A and G  leg (reverse test lead) , Good SCR will show  high resistance as Mega ohm

5. Test  G and  K  leg  then switch the test lead and do  testing  again.
Good SCR will show  low  resistance  ,  for the first and the second  measurement.
( Note some SCR part number , good SCR  show low resistance and  "OL") .
Bad SCR ( shorted ) will show  0 ohm    2 time.
Bad SCR (open ) will show  OL  2 time.

Test  G and  K  leg ,will show  low  resistance  2 time.

Test G and  K  leg ( reverse test lead) ,will show  low  resistance  2 time.

Step to test  SCR with   Analog  multimeter.
1. Take part number to find leg function from datasheet.
2. Set Analog  multimeter to  resistance test function ,  R x 1.
3. Connect test lead to  A and K leg.
4.  Test A and K leg  then switch the test leads   and do testing  again.
Good  SCR  the  pointer  will point  at   ∞  , for the first and the second  measurement
Bad SCR ( shorted ) will show  0 ohm   or  some   very  low  resistance for   2 time.

Test A and K leg by  Rx1 , Good SCR  the pointer  will point  at   ∞.

Test A and K leg  by  Rx1 ( reverse test lead ) , Good SCR  the pointer  will  point  at   ∞.

5.  Test A and G leg  then switch the test leads  and  do  testing  again.
Good SCR  the pointer  will point  at   ∞  , for the first and the second  measurement.
Bad  SCR ( shorted ) will  point  at   0 ohm   or  some  very   low  resistance  for   2 time.

Test A and G  leg by  Rx1 , Good SCR  the pointer  will point  at   ∞.

Test A and G  leg  by  Rx1 ( reverse test lead) , Good SCR  the pointer  will point  at   ∞

6. Test  G and  K  leg  then switch the test leads  and  do testing  again  ( use Rx1)
Good SCR will  show  low  resistance  , for the first and the second  measurement.
( Note some SCR part number , good SCR  show low resistance and  " ∞ ") .
Bad SCR ( shorted ) will  point at   0 ohm   for   2 time.
Bad SCR (open ) will   point  at   ∞  for   2 time.

Test  G and  K  leg  , Good SCR will show  low  resistance  for  2 time ( use Rx1)

Test  G and  K  leg ( reverse test lead) , Good SCR will show  low  resistance  for  2 time ( use Rx1)

How  to  check  electronic  device

Choose  article   below   to   read   more .

• 1)    30 testing of electronic devices
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2)   Test  Triac   with   multimeter

3)   Test   SCR   with   multimeter

4)   Test   MOSFET   with   multimeter