multimeter
How To Use A Multimeter To Troubleshoot Your Sensor
May 19, 2015 By Tim Olson Time to read 4 minutes
multimeter dial closeupSo, you’re having problems with the signal from your sensor. Maybe it only works occasionally, maybe there’s too much noise to establish a strong connection, or maybe you just don’t know what is wrong. One easy way to figure out what’s wrong is using a multimeter to test your sensor. Don’t worry, we will walk you through how to use a multimeter to troubleshoot your industrial sensor and get it working properly in no time!
But wait - what is a multimeter and how does it work? Let’s take a quick look. After all, we’ve got a sensor to troubleshoot.
Want to get straight to troubleshooting? No worries, click here for our easy steps on how to use a multimeter for troubleshooting your sensor!
What is a Multimeter?
A multimeter is an electrical instrument that is used to test circuits. Multimeters can measure voltage, current, resistance, and continuity, thus the name: multi-meter. A multimeter is crucial for troubleshooting. When a circuit or device malfunctions, testing for continuity (i.e., is the circuit continuous from source to sensor and back) and measuring voltage/current/resistance can help locate and identify problems.
On a multimeter you will find several settings available to test for different areas. The most common settings are:
for current, both alternating (AC) and direct (DC), measuring from micro- or milli-amps to amps;
for voltage, both AC and DC, measuring from millivolts to hundreds of volts;
for resistance, measuring from ohms to megaohms.
More advanced models have additional settings to measure capacitance, decibels, frequency, inductance and/or temperature.
How does a Multimeter work?
Magic miniature elves.
Or not. We haven’t been able to reach them for comment.
Until we hear from the elves, we’ll have to assume that multimeters are designed using fundamental electric circuit theory. (I know, it’s nowhere near as fun as magic elves.) Ohm’s Law states the fixed relationship between voltage, current, and resistance between any two points in a circuit: I=V/R (i.e., current is equal to voltage divided by resistance). Multimeters, like any good math student, use two known quantities to solve for the third, unknown, quantity:
To measure resistance, the change in voltage created by a small current is measured.
To measure voltage, the movement created by a quantifiably small current through known resistance is measured.
To measure current, a similar movement is measured through a resistance at a specific ratio to the current in question.
Further quantities mentioned above (capacitance, etc.) are measured using similar techniques.
May 19, 2015 By Tim Olson Time to read 4 minutes
multimeter dial closeupSo, you’re having problems with the signal from your sensor. Maybe it only works occasionally, maybe there’s too much noise to establish a strong connection, or maybe you just don’t know what is wrong. One easy way to figure out what’s wrong is using a multimeter to test your sensor. Don’t worry, we will walk you through how to use a multimeter to troubleshoot your industrial sensor and get it working properly in no time!
But wait - what is a multimeter and how does it work? Let’s take a quick look. After all, we’ve got a sensor to troubleshoot.
Want to get straight to troubleshooting? No worries, click here for our easy steps on how to use a multimeter for troubleshooting your sensor!
What is a Multimeter?
A multimeter is an electrical instrument that is used to test circuits. Multimeters can measure voltage, current, resistance, and continuity, thus the name: multi-meter. A multimeter is crucial for troubleshooting. When a circuit or device malfunctions, testing for continuity (i.e., is the circuit continuous from source to sensor and back) and measuring voltage/current/resistance can help locate and identify problems.
On a multimeter you will find several settings available to test for different areas. The most common settings are:
for current, both alternating (AC) and direct (DC), measuring from micro- or milli-amps to amps;
for voltage, both AC and DC, measuring from millivolts to hundreds of volts;
for resistance, measuring from ohms to megaohms.
More advanced models have additional settings to measure capacitance, decibels, frequency, inductance and/or temperature.
How does a Multimeter work?
Magic miniature elves.
Or not. We haven’t been able to reach them for comment.
Until we hear from the elves, we’ll have to assume that multimeters are designed using fundamental electric circuit theory. (I know, it’s nowhere near as fun as magic elves.) Ohm’s Law states the fixed relationship between voltage, current, and resistance between any two points in a circuit: I=V/R (i.e., current is equal to voltage divided by resistance). Multimeters, like any good math student, use two known quantities to solve for the third, unknown, quantity:
To measure resistance, the change in voltage created by a small current is measured.
To measure voltage, the movement created by a quantifiably small current through known resistance is measured.
To measure current, a similar movement is measured through a resistance at a specific ratio to the current in question.
Further quantities mentioned above (capacitance, etc.) are measured using similar techniques.
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