The multimeter function or the use of a multimeter is a discussion that I will present in this article, after I previously conveyed what a multimeter is and the parts of a multimeter. There are quite a lot of multimeter functions that you can use for various purposes or activities in assembling or making electronic equipment, including measuring resistance, measuring DC voltage, measuring power and others.
Below I briefly describe each of the functions of the multimeter, which are as follows:
Measuring Resistance
This multimeter function is performed to measure the resistance level on the resistor. The trick is to turn the steps on the OHM, then the ends of the red and black probe wires are touched or attached to each end of the resistor wire and do the zero setting by turning the knob to zero.
Measure DC Voltage
This multimeter function is performed to measure the voltage in a battery. The trick is, estimate the voltage to be measured, place the step on a higher scale, then attach the red probe to the positive end of the battery and the black probe to the negative end of the battery.
Measure Power
This multimeter function is performed to calculate power from the results of current and voltage measurements.
Measure AC Voltage
This function is performed the same as in DC voltage measurement. To estimate the voltage to be measured, place the range on a higher scale. In general, multimeters can only measure sine-shaped currents with a frequency between 30Hz - 30KHz. The measurement result is the effective stress (Veff).
Measuring Current (Unidirectional)
The circuit to be measured is disconnected at one point, then through the two broken points, the current is passed through the multimeter, but before all the charges are discharged.
Testing the capacitor
Previously, the condenser is discharged, turn the line and place it on the OHM, then attach the red probe to the positive pole and the black probe to the negative pole on the capacitor. If the indicator needle deviates to the right and gradually moves to the left, it means that the capacitor is in good condition. If the needle does not move, the capacitor breaks. And if the needle is stuck to the right and does not come back, it is possible that the condenser will leak.
Testing Relationships on Circuits
The multi meter can also be used to test a circuit or it can be used to test the transformer coil to check its resistance. The connection is said to be good if the resistance shows zero.
Testing Diode
To test the diode, place the step on the OHM x1 k or x100, then the red needle probe is attached to the cathode (which has a ring mark) and the black needle probe on the anode, the indicator needle must point to the right. Now try to reverse, the red needle to the anode and the black needle to the cathode. As a result, the indicator needle must not move. If it moves, the diode may be damaged. This method can also be used to determine which anode and which cathode if the diode ring is not visible or erased.
Testing Transistors
The transistor is or is the same as the combined diode, so the principle of the test is the same as the papa diode test. The test is carried out first the step is placed on the OHM x100, then the black probe is attached to the base and the red probe is attached to the collector. After that, see the indicator needle must shift to the right. If the red probe is moved to the emitter, the indicator needle must move further to the right.
Then, the red probe on the base and the black probe on the collector, the indicator needle should not shift, but if the black probe is moved to the emitter and the red probe to the collector, pay attention that the indicator needle should not be shifted. With a step at the x1 k position, the black probe is attached to the collector and the red probe is attached to the emitter, the indicator needle must be shifted slightly to the right and if it is reversed, the indicator needle must not be moved. If the test results are not the same as those described in this way, it is possible that the transistor is damaged.
Actually there are still many tests that can be done using a multimeter, according to the number of electronic components that we will use in making electronic devices, but due to time and opportunity limitations, I can only convey a few. For more details, you can try to explore for yourself about the function of this multimeter, so that you will be more proficient in using it.
Thus a brief description of the function of this multimeter, hopefully this is useful.