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Force and motion

Force and Motion

Testing a Battery

When you use a DMM to test for continuity, remember that you are using the battery inside the DMM. To save this battery, there are two important guidelines:

  • WHEN MEASURING CONTINUITY, TEST INDIVIDUAL COMPONENTS ONLY. NO BATTERY SHOULD BE CONNECTED.
  • TURN THE METER TO THE “OFF” POSITION WHEN YOU ARE DONE. The diagram below shows the connection and DMM setting for testing a switch. Here’s how to read the result on the meter:
  • If the DMM reads 1, there is no electrical connection between the two contacts – they’re open
  • If the DMM reads 0.00 (or very close to zero), the contacts are connected – they’re closed.