What are the precautions to be taken while using a multimeter?

What are the precautions to be taken while using a multimeter?

Precautions in Handling and Using a Meter

• Do not drop any meter.
• Do not overload any meter.
• Do not tamper with precision instruments.
• Before you connect a meter to a circuit, ensure that the range switch is set to an appropriate position.
• Carefully check circuit connections before applying power to meters.

What caution should be observed when measuring resistance with an ohmmeter?

Measuring Resistance Before proceeding, you should be aware of the following important safety precaution that must be observed when using the ohmmeter function of a VOM: CAUTION Never connect an ohmmeter to a “hot” (energized) circuit. Be sure that no power is applied and that all capacitors are discharged.

How do you prevent a damaged multimeter?

You can avoid damaging your digital multimeter by anticipating the signal level you’ll measure and presetting the proper signal range on the DMM. Overpowering the digital multimeter can damage the components inside the meter.

What do we use to measure resistance?

Resistance is measured using an instrument such as an analog multimeter or digital multimeter. As a result, a circuit’s resistance value can be determined if the current and voltage measured values are known. Analog multimeters and digital multimeters employ the measurement principle of Ohm’s Law to measure resistance.

What does a ohmmeter measure?

Ohmmeter, instrument for measuring electrical resistance, which is expressed in ohms. In the simplest ohmmeters, the resistance to be measured may be connected to the instrument in parallel or in series. Ratio meters measure the ratio of the voltage across the resistance to the current flowing through it.

What is the function of a multimeter?

A digital multimeter is a test tool used to measure two or more electrical values—principally voltage (volts), current (amps) and resistance (ohms). It is a standard diagnostic tool for technicians in the electrical/electronic industries.

What are the safety precautions for a multimeter?

Multimeter Safety Precautions. Be sure that the multimeter is switched to AC prior to trying to measure AC circuits. De-energize and discharge the circuit completely prior to connecting or disconnecting to a multimeter device. Check proper dc polarity when measuring dc. Constantly begin with the highest voltage or current range.

How do you take a resistance reading on a digital multimeter?

1. Turn power to circuit OFF. If a circuit includes a capacitor, discharge the capacitor before taking any resistance reading. 2. Turn digital multimeter dial to resistance, or ohms, which often shares a spot on the dial with one or more other test/measurement modes (continuity, capacitance or diode; see illustration below).

What should I do before connecting to a multimeter?

De-energize and discharge the circuit completely prior to connecting or disconnecting to a multimeter device. Check proper dc polarity when measuring dc. Constantly begin with the highest voltage or current range.

What should I do if my digital multimeter is damaged?

Check the meter, test probes and accessories over for signs of physical damage. Make sure all plugs fit securely and keep an eye out for exposed metal or any cracks in the casing. You should never use a damaged meter or damaged test probes.