Tuesday, February 16, 2021

Multimeter test EX1 test diode with advance digital multimeter

Test   a    diode   with    advanced   digital   multimeter    

Advanced    digital   multimeter  has  many useful test function , it  is suitable for industrial use , technician level  and also fit  basic measurement.  It  provide  both auto  range  and manual range setting , high DC and AC current test function and  some  model  add  temperature measurement.  Another key feature it passed  higher safety standard CAT III  , CAT IV  level  which  will print on multimeter to indicate and ensure safety ,   level  of  usage.    Low cost digital multimeter can  set  range by manual only so it is suitable for  student ,  DIY circuit  ,  basic  repairing.  Here  it  will  use advance  digital  multimeter to test diode.   Is  it easy  to use  ?   ,  measurement  below  will   give  an   answer.


Test Diode
   Advance  digital   multimeter  for industrial and complex measurement , technical level


                               Low cost   digital  multimeter  for   basic measurement.

      CAT IV  Measurement  Category  level  is  suitable   for   industrial   measurement.



Step to test  diode  with  advance  digital  multimeter.
1. Insert the red test lead to  V Hz ll   terminal and   the  black test lead to  COM terminal.
2. Turn the range switch to  Diode  Test. The screen will display diode symbol  as  above photo No.1
3. Forward bias to diode , connect the red test lead to Anode terminal and black test lead to  Kathode terminal.   Good diode will display 0.3-0.8V.  Shorted  diode  display  000 , open diode display OL.


Test  Diode
                                Kathode  terminal  has  white stripe indication.


Test   diode  with  multimeter
  Forward bias to diode  ,  good diode will display  0.3-0.8V  forward  voltage  drop


4. Reverse bias to diode , connect the red test lead to Kathode terminal  and the black test lead to Anode terminal.  Good  diode  will display   OL.   Shorted  diode  display 000 ( or very small amount such as 002)

Test   diode
                               Reverse bias to diode    ,  good diode will display  OL.


4.  Shorted  Diode will display  000 ( or very small amount such as 002)  for forward biasing and  reverse biasing.  Switch the test   leads also  still  get  the same display as 000.

Test   diode
          Shorted  diode will display  000 ( or very small amount such as 002)


4.  Open   Diode will display  OL     for  forward biasing and  reverse biasing.  Switch the test  leads also  get the same display as  OL.


Test   diode
    Open  diode will display  OL   , switch the test   leads  still   get  the same  OL  display.