You can count on the actual resistance of a precision resistor being really close to its nominal value. So, if you buy a 100 Omega precision resistor, chances are its actual value is within 1 or 2 of 100 Omega. The following figure shows a diagram of the color code of a standard (fou...
With experience, you will learn to avoid these pitfalls. When in doubt, check the datasheet or use a multimeter to measure the actual resistance. Other Resistor Markings While color coding is the most common, resistors may also be marked in other ways: ...
Select the "AC Voltage" by turning the dial on the front to the picture of an oscillatory wave. Bring the probes into contact with the circuit that has the ripple voltage. The multimeter will only measure the AC component of the signal -- i.e., the ripple voltage. The display should c...
To get your multimeter set up to measure resistance, connect the black probe to the COM port and the red probe to the port marked with Ω. Select the resistance option marked on the dial, and choose the range you think yourresistoris within. To measure resistance, simply place the probes ...
The selection knob allows the user to set the multimeter to read different things such as milliamps (mA) of current, voltage (V) and resistance (Ω). Two probes are plugged into two of the ports on the front of the unit. COM stands for common and is almost always connected to Ground...
How to Measure Resistance Using a Multimeter Connect the red probe to “VOhmsmA Jack” and the black probe to Resistance Circuit Symbol “COM” jack. Set the “Range Switch” to desiredOhmsposition. If the resistor to be measured is connected to a circuit then TURN OFF POWER a...
with the resistance in the ammeter. If the value of the resistance is much greater than the internal resistance of the ammeter, the voltage divided by the ammeter is very small, then the voltage measured by the voltmeter is close to the voltage across the resistor, so the internal connection...
To auto-select the highest range first, the microprocessor uses a multiplexer to activate the path passing through the highest range's resistor or shunt. If the ADC overflows or is too close to its lower limit, the processor uses the multiplexer to activate the next lower range. This continu...
And a very large resistor, such as 1MΩ would make it read a value of 1023. These are just examples to give you a feel for how the ohmmeter would work with a 1KΩ resistor as its reference resistor. The next variable, Vin, is assigned to 5 because 5V is being supplied by the ...
read value on device Usually when you need to measure current for given load, the multimeter is wired in series in the circuit. Since here, there is practically (almost) not load at all I have decided (to best of my knowledge) to connect the multimeter directly to ...