The creation of digital multimeters has revolutionized the way electricians troubleshoot electricity. Analog multimeters limit their users to just some specific jobs, such as measuring voltage, current, and resistance. Today, digital multimeters, also referred to as DMM, provide more than these three uses. These devices can measure current, voltage, resistance, frequency, temperature, and many other parameters. Also, these devices are very easy to use, and DIYers and electronics enthusiasts can utilize them easily. Despite all this, it is important for a person to correctly and safely use digital multimeters. Failure to do so might lead to serious issues.
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In this article, we’ve put together various safety precautions that a multimeter user should know about when using this versatile device. To avoid causing harm or havoc, here are various precautions that you should follow when using a digital multimeter:
- Never apply power to the circuit when measuring resistance with a multimeter.
- 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.
- If you are finished with a multimeter, switch it off if present. In case there is no off position, switch the multimeter to the highest ac voltage position.
- Be sure to read ac measurements on the ac scale of a multimeter
- Choose a final range that enables a reading close to the middle of the scale.
- In case you want to verify the presence of dangerous voltage in a circuit with a digital multimeter, it is crucial to verify both ac and dc voltage.
- Set the ideal current range before measuring higher current, or else it will blow the digital multimeter fuse.
- Change the 0 ohms reading after changing resistance ranges and before creating a resistance measurement.
- A resistor should be measured standalone, or the connected parts in the circuit may affect the reading.
- If there is a capacitor in the circuit, you will definitely hear a beep sound until the capacitor drains. Constantly confirm the presence of the capacitor to prevent any confusion.
When you follow the above safety precautions, you can be sure to avoid the dangers that come with using the digital multimeter device. Beginners are not aware of these safety precautions, and it is important that any person who intends to use the digital multimeter follow them to avoid harm or havoc in the long run.
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