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Multimeter test serial connection manual#

To do this, insert the black probe into the "COM" or "-" jack and insert the red probe into the "A" jack.

Ideal for the homeowner, this meter were to be used to measure current through a 4700 ohm resistor across 9 Volts DC. This is why when testing resistance, adjust the range so that the readings may be taken from the middle rather than the extreme left or right sides.Ĭonsider using a "clamp-on" ammeter. It would be much easier at the R x 1 scale instead.

Trying to read 5 ohms on the meter while in the R x 100 range would look like 0. Values at the left side are harder to accurately read than those on the right. With this understanding, study the R scale.The scale selected is very important for accurate measurements. Had the R x 10 scale been selected, 150 would have been 1,500. In the previous step, each number represented a value that was 100 times greater.The scale of resistance has been changed so that each number on the R scale can be read directly. Observe how the meter did not go as far to the right as before. Zero the meter again for this range and repeat the step above.

Multimeter test serial connection manual#

Consult the meter manual if you're unsure which jacks should be used. It is equally important to have the test leads connected to the proper jacks as it is to have the selector switch range and test type (volts, amps, ohms) set.

Many meters have additional jacks that are required for current or high-voltage tests.

This is nice to know when the circuit under test isn't labeled + or, as is usually the case. If the test leads were installed as suggested, the red lead would be positive as compared to the black test lead.

The + and symbols represent the polarity of probes when set for and testing DC volts.

The other jack or jacks should be labeled "V" (+) and the Omega symbol (an upside down horseshoe) for Volts and Ohms, respectively.

It will be used for nearly every measurement taken. This is where the black test lead will be connected. One is usually labeled "COM" or (-), which stands for for common.Most multimeters have several jacks used for this purpose. Locate the openings in the case where you'll insert the test leads.