{[ promptMessage ]}

Bookmark it

{[ promptMessage ]}


Before using a meter read the manufacturers operating

Info iconThis preview shows page 1. Sign up to view the full content.

View Full Document Right Arrow Icon
This is the end of the preview. Sign up to access the rest of the document.

Unformatted text preview: f each. Before using a meter, read the manufacturer's operating instructions. Reading analog meters usually requires simple mental calculations. For example, a meter might have three voltage ranges: 4.0 V, 20 V and 40 V, but only two scales: 4.0 V and 20 V. In order to use the 40 V range, you need to multiply the needle reading on the 4.0 V scale by 10 (or for that matter, the 20 V scale by 2). Digital meters are usually simpler to read and many will adjust to the proper range required for the circuit or device they are Voltmeters measure voltage or voltage drop in a circuit. Voltage drop can be used to locate excessive resistance in the circuit which could cause poor performance or improper operation. Lack of voltage at a given point may indicate an open circuit or ground. On the other hand, low voltage or high voltage drop, may indicate a high resistance problem like a poor connection. Voltmeters must be connected in parallel with the device or circuit so that the meter can tap off a small amount of cu...
View Full Document

{[ snackBarMessage ]}

Ask a homework question - tutors are online