Q:

How do you use a multimeter to test ohms with GB instruments?

A:

Multimeters have an option to measure resistance indicated on their front panels. By switching the dial to the ohms setting and turning the power off to the appliances being measured, the status of a circuit can be determined.

  1. Turn off power

    A multimeter tests resistance by sending a small electrical charge through the device and recording the current. If the power is on, it will disrupt the device and blow the fuse of the multimeter. Therefore, remove the battery or unplug the appliance from the wall.

  2. Connect the multimeter's leads and set it to the resistance reading

    The red lead goes to the port marked "VA" or something similar. The black lead goes to the port labeled "COM". Turn the measurement setting of the multimeter to resistance, which is indicated by the ohms symbol. Many digital multimeters will adjust range, but analog multimeters may have ohm, kiloohm, or even megaohm ranges.

  3. Touch the leads to the terminals

    Touch the red lead to the positive terminal, marked with a plus sign or the shorter outlet plug, and touch the black lead to the negative terminal or larger outlet plug. Although current can travel either way, it's best to get into the habit of learning which leads are which. Also, always grip the leads by the plastic or rubber housing, never by the metal tip.


Is this answer helpful?

Similar Questions

  • Q:

    How do you test a wall outlet with a multimeter?

    A:

    A multimeter is able to let you know how much electricity is flowing through a wall outlet. Though it generally is not a good idea to insert objects into a wall outlet, a multimeter only works when you insert its probes into an outlet. There is a safe way to do this.

    Full Answer >
    Filed Under:
  • Q:

    How do you check for an electrical short in a house?

    A:

    To test a household electrical circuit for short circuits or places where the circuit deviates from its path, use a multimeter. Set the multimeter to measure resistance, and test any electrical outlets that are suspected of having short circuits.

    Full Answer >
    Filed Under:
  • Q:

    How do you test an oil pressure sensor?

    A:

    Test an oil pressure unit using a multimeter that is set to resistance with the engine off. Test the unit again with the engine running. The process takes only a few minutes.

    Full Answer >
    Filed Under:
  • Q:

    How do you test capacitors with a multimeter?

    A:

    To test a capacitor with a multimeter, discharge the capacitor, set the multimeter to test for resistance then interpret the reading. There are other testing methods other than resistance that can be used. Since capacitors store voltage, the multimeter is also capable of reading volts, so if the multimeter being used has a capacitance meter, the actual capacitance value is given.

    Full Answer >
    Filed Under:

Explore