Ohm Multimeter
2009
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Ohm Multimeter
Digital multimeter- a useful measuring device
Digital multimeter measures various parameters that are within any electrical circuit. This can come with different features yet the basic may measure amps, ohms or volts like its older counterpart which is the analogue meters. Most of them have other functions such as measuring continuity, frequency, temperature and capacitance or even other measurements.
Typically, digital multimeters' interfaces on the front are quite straightforward. Know the controls and connections of this device:
The digital multimeter display is typically easy to read and most of them have 4 digits. The first digit may either be 0 or 1 only and normally there is a positive (+) or (-) indication.
For the probes to connect, it has main connections. Even though it only needs 2 at any one time, there may be 3 or 4 like the common (use with all the measurements and takes probe and black lead), amps and milliamps (used for current measurement; it takes probe and red lead, high current (a different connection for high measurement of current, take care when using this) and volts, frequency and volts (used for most of the measurement and usually take red lead or positive and probe.
Normally, there is a single main rotary switch in order to choose the type of measurement and the particular range needed.
Some additional connections or measurement like temperature would need its own connections; some of them may measure the gain of transistors and requires separate connection on the meter. In addition, there may be more buttons and switches, it may either be am on or off or peak hold may become available too.
Those were the parts and functions of the digital multimeter. Understanding the parts and function will give you a good idea on how to use it.
The overall accuracy of Digital multimeter depends on the number of elements that contributes it. Its major constituents are the actual accuracy and the resolution.
Normally it is the accuracy of the meter is not the same or different from the display resolution. This means that there is an uncertainty because of the inaccuracies of the digital multimeter.
If it is the first time it's being used, make sure to read the instruction manual properly the one that came with it. It will give a detailed instructions and the type of battery that has to be attached although alkaline are the typical batteries used.
The Maximum reading capacity of digital multimeter in very important and this is the highest amount of current that the meter may measure, it is usually located on the face of the meter and mostly limits at about 10 amps. Do not hook it up with a current which has 12 amps for the internal fuse may blow in order to prevent this, install a bigger fuse,
Aside from testing a battery, pinpointing an electrical short, measuring a circuit's capacity this device is versatile and has to be in every toolbox at home.
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what resistor do i need that reads 10 ohms when the multimeter is set to 200k?
A 10 ohm resistor
Ohm's Law pt1- Setting up the multimeter to measure current
