Resistor Continuity Test

Discussion in 'General Electronics Chat' started by GASANT, Aug 18, 2013.

  1. GASANT

    Thread Starter New Member

    Apr 30, 2012
    4
    0
    Hi

    I am testing for continuity in circuit. However I am not getting a beep sound between resistors. The resistors are not faulty.

    I need to know whether this in normal.

    Please explain why?.

    Thank you
    Gasant.
     
  2. studiot

    AAC Fanatic!

    Nov 9, 2007
    5,005
    513
    First and foremost is your tester working and set to the right range?

    Does it work correctly on another, known good, test piece, such as a piece of straight wire?

    How do you mean between resistors?
     
    Last edited: Aug 18, 2013
  3. MrChips

    Moderator

    Oct 2, 2009
    12,421
    3,357
    a) You cannot test a resistor in-circuit unless you are certain that the resistance of the circuit to which the resistor is attached is greater than ten times the resistor being tested.

    b) The continuity test that produces an audible tone requires the resistance to be lower than a certain value, about 20 ohms.
     
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  4. #12

    Expert

    Nov 30, 2010
    16,257
    6,757
    Read the instructions for the continuity meter and do not expect it to beep when you are measuring a resistance that is higher than the range it is supposed to beep for.
     
  5. MaxHeadRoom

    Expert

    Jul 18, 2013
    10,509
    2,369
    On Many meters you only get the beep on the Diode test range, is this what you are on? or what resistance range?.
    The 'Diode Continuity' range usually tests for forward bias and indicates the volt drop in the forward direction?
    Max.
     
  6. Shagas

    Active Member

    May 13, 2013
    802
    74
    The whole purpose of the continuity function on a multimeter is used to test if there is a low resistance path between the two points that you are probing.
    You can use it to test if a component such as a transistor or diode is shorted , or if two traces on a pcb are shorted together .. etc.
     
  7. MaxHeadRoom

    Expert

    Jul 18, 2013
    10,509
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    The Fluke meter I have, which is a high quality brand in N.A. has two functions on the continuity test.
    One: Is as a continuity tester that buzzes if res. is < 25Ω and shuts off if over >250Ω.
    Two: Testing semiconductor or Diode, it will show 2.4v in the fwd direction and OL in the reverse, if diode is shorted, then it shows <0.5v.
    Max.
     
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