Telecom Tools: Multimeters

Multimeters are a telecom tool that serves as an electronic measuring device. They can also called volt/ohm meters (VOM). It is a single piece that can do several electronic functions. A barebones model showcases functions such as the capability to measure resistance, voltage and current. This telecom tool comes in two different classifications analog and digital. (aka DMM or DVOM)

This device’s history dates back to the 20’s. This was at a time history when vacuum tubed electronics devices were becoming more prevalent. As modern systems continue to advance, the multimeter is becomes an even greater tool itself. A good example of this would be how a general purpose multimeter works.

At one time a general purpose multi meter would only work on short-circuits it could also read some hints of insulation levels and conductor resistance. However, portable modern models that can test a greater area of coverage.

This telecom tool can be used as a device that tests for field work basic or fault finding. A very famous used or this tool is as a means to troubleshoot problems that are electrical. Whether in the business sector or home electrical issues that stem from motors, appliances, wiring, batteries and power sources a multimeter can be worked on with a multimeter.

Now let’s find out a little more about analog and digital multimeters. Shall we?

Analog multimeters tend to have some accuracy issues due to misreads and problems with zeroing out. Although they’re sometimes more adept at finding changes in a reading. This is because it’s harder for a radio signal to interfere with an analog multimeter’s readings.

A Digital Multimeter’s readings come out in exact numbers this prevents any issues with a parallax from happening. With modern day electronics and computer technology playing its hand in their manufacture digital multimeters have a ton of advantages over their analog siblings. They’re capable of:

• Auto-ranging - This feature gives you the most accurate readings when running tests. Not too much guessing goes on here.
• Auto-polarity - This is intended for reading dc voltage.
• Sample and hold –This takes your most current exam reading after doing a circuit test.
• A graphic representation – this shows in great details the levels of various things and their quantities
• A built in low-bandwidth oscilloscope.

• There is a built in feature that allows for a limited amount of savable data that you are allowed to store on this device.
• You are also given the capabilities to use surface-mount technology.

The first digital multimeter of it kind was introduced in 1955. The company Non Linear Systems was the manfuacturer. Modern multimeters are given computer compatibility. The connections that the mulitmeter can hook up to are IDA, USB and IrDA. Another special port that a DMM can be plugged into is the IEEE-488. When hooked into the computer the multimeter can still make readings. Data such as measurements from your meter can be transferred to the computer.

Multimeters both analog and digital are varied in how they’re equipped and how much they cost. A very basic multi meter can run at about $10. The fancier versions the ones considered the cream of the crop can cost over $5,0000.