Safety precautions when using digital multimeters

When using digital multimeters, we should be careful and observe few safety precautions in order to keep ourselves safe. This is also necessary for safety of the instrument. This article provides important tips on safety precautions digital multimeters like Fluke1587.

When using digital multimeters, we should be careful and observe few safety precautions in order to keep ourselves safe.

1. General precautions

• When not in use, keep the digital multimeter knob in OFF position or the highest voltage position.

• If you want to check presence of hazardous voltage in a circuit with a digital multimeter, it is important to check for both AC and DC voltage.

2. Continuity Check

• Before starting any measurement activity, you should check the multimeter for continuity. For this, connect its leads and confirm that it reads zero. When performing continuity check for a circuit, switch off the power supply to the circuit.

• If there is a capacitor in the circuit, you will hear a beep sound until the capacitor drains. Always confirm the presence of capacitor to avoid any confusion.

• If you change the leads (between red and black), the readings should not change.

3. Voltage Measurement

• While measuring voltage, never touch the bare probe tips together as it will lead to a short circuit.

• Many digital multimeters have auto ranging facility so that you need not worry about overloading but it makes them work slower and it increases their cost also.

• If auto ranging is not available, appropriate range should be selected so that multimeter reading is near midway on the scale.

• You should check for DC voltage and AC voltage modes in your digital multimeter whether these are separate. Check the user manual to confirm.

• If lower range is selected, the multimeter shows 1 which means that the actual reading is out of selected range. If required voltage for a DC circuit is not known, start from the highest value and go down until correct range is identified.

• If you forget to put the red lead into appropriate socket for voltage measurement and the red lead is connected to current socket in the multimeter, a voltage measurement in this situation may lead to a short circuit through the multimeter.

4. Current Measurement

• For current measurement, the multimeter should be connected in series while it should be connected in parallel for voltage measurements.

• When the multimeter knob is set to current measuring mode and you forget to change it to voltage measuring mode before taking voltage measurements, it may be a cause of potential hazard.

• Set the right current range before measuring higher current otherwise it will blow the digital multimeter fuse.

• Don't try to measure the current in household AC mains as it is dangerous.

5. Resistance Measurement

• Power should be tuned off before taking any measurement.

• A resister should be measured stand alone otherwise connected comonents in the circuit may affect the reading.

• If you still need to measure a connected resister, ensure that any capacitors in circuit are drained off.

Related Articles

Buy Huawei Ascend II free from US cellular online

Features and specifications of budget phone Huawei Ascend II is provided here. US cellular is offering Huawei Ascend II with a mail rebate of $100. So you can buy Huawei Ascend II online from US cellular with a price of $0.00. The prepaid price in USA of Huawei Ascend II is $139.99.

IRCTC Virtual Reservation Message(VRM) - How to get it?

Read this article on 'IRCTC Virtual Reservation Message(VRM) - How to get it?'. You can travel on train having only a mobile. Ticket comes in the form of message and this message will be treated as a valid ticket. During travel passengers must have to carry his/her valid original photo-id. No need to book ticket standing on a long queue, not to take any tention about a printout copy. Travel on train anywhere freely.

LG Mouse Scanner LSM 100 features & price

LG Mouse Scanner LSM 100 features & price are added here. LG brought world's first mouse cum printer LG Mouse Scanner LSM-100 which has no different with conventional average mouse and whose one portion is mouse and one portion is scanner. With this mouse scanner you can scan documents and photos and save them in Microsoft Words, Excel. Read this article to know more about this multi-tasking mouse.

How to create an image map in HTML

This article will help you in creating the image map in html. You will also get the knowledge about the various shapes that image map supports. Also the ways to add co-ordinates in the map tag and others details of adding the map over the image are described here.

More articles: Latest Tech News


No responses found. Be the first to comment...

  • Do not include your name, "with regards" etc in the comment. Write detailed comment, relevant to the topic.
  • No HTML formatting and links to other web sites are allowed.
  • This is a strictly moderated site. Absolutely no spam allowed.
  • Name: