The VOM and DMM are both multi-meter devices where it functions as a valuable tool in reading electrical properties such as Resistance, Current, Voltage and etc... Electricians, Electronic Technicians, Students (taking-up related technology courses) and hobbyist makes use of this tool on their projects. Without the use of VOM and DMM, we wont be able to conduct repairs on our broken equipment or devices. We also wont be able to make those wonderful projects and etc... Moreover, there are differences between these two type of tool which is what we are going to discuss on this article.
VOM
VOM stands for "Volt Ohm Meter". It is the traditional measuring device that are commonly used by an Electronic Technician. They are using it to diagnose any broken equipment to determine the defective component for replacement. The use of this tool requires some skills in reading the scale-chart.
DMM
DMM stands for "Digital Multi-Meter". It is the same tool as the VOM but the main difference on the output is that the DMM displays the values in direct numbers. The output can also be setup to four decimal places providing you with a more accurate result. However, the output is usually unstable especially on the last four decimal places.
Both of these Multi-Meter tool consists of two test probe. One is color Red and black is the other. The red probe indicates the positive polarity while the black is for the negative polarity. It is very important that you should always be aware on the part of the circuit where you make contacts with your test probes. Take note that the analog VOM meter cannot provide you negative readings unlike the DMM. Another important to remember when using the VOM is to avoid connecting the test probe in reverse polarity because it can damage the tool.
The VOM are recommended on those simple circuits since accuracy doesn't really matter and there is a huge range of level for the required output. DMM are used on highly sophisticated circuits that needs to output accurate measurement and such equipment are the Oscilloscope, Multi-Meters and other measuring devices that generate highly precise measurement.
There are advantages and disadvantages between these two Multi-Meter devices but there is still a huge debate on which of them are the best tool to use. I guess it's all up to you to decide whether to use one of them or simply both.
VOM
VOM stands for "Volt Ohm Meter". It is the traditional measuring device that are commonly used by an Electronic Technician. They are using it to diagnose any broken equipment to determine the defective component for replacement. The use of this tool requires some skills in reading the scale-chart.
DMM
DMM stands for "Digital Multi-Meter". It is the same tool as the VOM but the main difference on the output is that the DMM displays the values in direct numbers. The output can also be setup to four decimal places providing you with a more accurate result. However, the output is usually unstable especially on the last four decimal places.
Both of these Multi-Meter tool consists of two test probe. One is color Red and black is the other. The red probe indicates the positive polarity while the black is for the negative polarity. It is very important that you should always be aware on the part of the circuit where you make contacts with your test probes. Take note that the analog VOM meter cannot provide you negative readings unlike the DMM. Another important to remember when using the VOM is to avoid connecting the test probe in reverse polarity because it can damage the tool.
The VOM are recommended on those simple circuits since accuracy doesn't really matter and there is a huge range of level for the required output. DMM are used on highly sophisticated circuits that needs to output accurate measurement and such equipment are the Oscilloscope, Multi-Meters and other measuring devices that generate highly precise measurement.
There are advantages and disadvantages between these two Multi-Meter devices but there is still a huge debate on which of them are the best tool to use. I guess it's all up to you to decide whether to use one of them or simply both.
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