The meaning of the function adjustment knob of the analog multimeter
Different pointer multimeters can detect different items, so their key compositions and functions are also different. Below, we will take a typical pointer multimeter as an example to introduce the distribution and meaning of this type of multimeter button: the function knob of the pointer multimeter is located on the main body (panel) of the multimeter, and there is a range dial on its circumference, as shown in the figure. Therefore, the function adjustment knob of the pointer multimeter should be understood first when using it:
1. The OFF position is when the internal circuit of the pointer multimeter is in a disconnected state. When the multimeter is not in use, turn the knob to this position. 2. When measuring AC voltage, select the AC voltage mode (ACV), which has four ranges of "10V, 50V, 250V, 1000V" based on the measured voltage value. 3. When measuring DC current with H-current rll current mode (DCA), select this mode and divide it into 6 ranges based on the current value: 50 μ A, 0.5mA, 5mA, 50mA, 500mA, 10A. 4. When measuring resistance with Ohm mode (OHM), select this mode and divide it into "x1, x10, x100, xlk, xl0k" and other modes based on the measured resistance value. 5. When measuring the transistor amplification factor (hFE), select this gear and read directly based on the pointer reading. 6. Select the beep gear when detecting the diode. 7. DC voltage mode (DCV) is selected for measuring DC voltage. Based on the voltage range being measured, the following six modes can be selected: 2.5V, 10V, 25V, 50V, 250V, and 1000V.
