Five steps to easily measure with a multimeter
For us who are not so professional, do we often get confused when using a multimeter, such as how to measure voltage? The question of how to measure current is actually very simple. All you need to do is "one look", "two boards", "three tests", "four tests", and "five resets". Here are a few measurements listed below. Let's learn them now:
1, DC voltage measurement
The first step is to 'look', which is to see where the current conversion switch is located and whether it is in the DC voltage range.
Turn the conversion switch to the DC voltage of 2.5V.
The "three tests" refer to testing by connecting one probe with positive or negative polarity to one end of the battery to be tested, quickly touching the other probe with the other end of the battery, and observing whether the direction and size of the pointer's deflection are normal.
The "four tests" refer to tightening the probe after the trial test is successful.
Five Reset ": Turn the conversion switch of the multimeter to the maximum AC voltage level to avoid burning out the multimeter.
Attention: If the measured DC voltage is unknown, it should be tested one by one from the maximum voltage range. Until the indication deviates to 2/3 of the full scale position.
2, AC voltage measurement
The method of measuring AC voltage is very similar to the method of measuring DC voltage, but the difference is that AC voltage does not have a positive or negative distinction, so the probe does not differentiate between positive and negative.
Attention: The AC voltage values commonly encountered in machine tool electrical maintenance are mostly higher voltages of 380V or 220V. If the wrong gear is selected, it is easy to burn the meter, so when measuring, it is necessary to strictly follow the steps of "one look", "two pull", "three tests", "four tests", and "five resets".
One look "gear
Turn the multimeter switch to 250V using the "two switches".
Three tests "are conducted on single-phase AC power. During the test, pay attention to observing whether the deflection of the meter needle is normal. If there are no problems during the test, proceed to the next step.
Measure and read the values using the "four tests".
Reset the multimeter with "five resets".
3, Measurement of Resistance (DC Resistance Measurement of Incandescent Light Bulbs)
The steps for measuring resistance and voltage with a multimeter are different. It should be carried out according to the steps of "first inspection", "second adjustment", "three zeroing", "four testing", and "five resetting".
At first glance, the gear of the multimeter was originally in the voltage range.
Switch the switch of the multimeter from voltage mode to R * 10 mode using the "two switches".
Triple zeroing ", also known as Ohmic zeroing, is the process of short circuiting the red and black probes of an ohmmeter and rotating the Ohmic zeroing knob so that the pointer points directly to the zero point on the right side of the scale line of the ohmmeter
Read the values of "four measurements".
Reset the "Five Reset" multimeter to the maximum AC voltage setting.
