How to judge the quality of the multimeter's AC voltage file (ACV)
Regarding the method of judging the quality of the multimeter's AC voltage range (ACV), household detection sources include AC adapters, household sockets, etc. It is recommended to measure relatively small voltages, such as AC adapters, and then measure the voltage of household sockets.
How to judge the quality of the multimeter's AC voltage file (ACV)
Multimeter AC Voltage Range (ACV)
Household detection sources include: AC adapter, household socket (two-phase 220V, it is best not to measure three-phase 380V, because this voltage is more dangerous, for the instrument (at least a multimeter with a CAT III 600V) and the user. higher requirements).
For safety reasons, it is recommended to measure a relatively small voltage, such as an AC adapter, and then measure the voltage of a household socket. For the specific safe operation method, please refer to the product manual.
The test voltage of the multimeter is that one sign (DCV) (ACV): DCV is DC voltage, ACV is AC voltage.
The meaning of ACV, DCV, DCmA on the multimeter:
DCV stands for direct voltage, ACV stands for alternating voltage, DCA stands for direct current, and ACA stands for alternating current, both of which measure voltage and current.
What do the symbols on the multimeter represent?
1. DCA (direct current)
2. DCV is the direct current voltage
3. ACV is AC voltage
interface:
The Cx interface is the interface for the capacitance to be measured. PNP NPN: To measure the magnification of the triode, first convert the meter to the measurement hfe position, and insert it into the corresponding hole according to the labeling of each pole and the characteristics of the triode to be tested.
COM: Common interface for current, voltage diode, resistance, and frequency tests.
Precautions:
ACV is the AC voltage range, DCV is the DC voltage range, the two black test leads are plugged into the com, the red test leads are plugged into the V ohm jack, and DCmA is the DC current milliamp range.
When the current is high, the red pen is inserted into the 10A or 20A jack. When measuring the current, the multimeter must be connected in series with the circuit through the load, otherwise the multimeter will be damaged and the power fuse will be burned.
