Meanings of Function Adjustment Knobs for Analog Multimeters
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. Circuit breaker (OFF)
The circuit breaker 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. AC Voltage Range (ACV)
Select this gear when measuring AC voltage, and there are four ranges available based on the measured voltage value: 10V, 50V, 250V, and 1000V.
3. H-flow RLL flow barrier (DCA)
When measuring DC current, select this gear and divide it into six ranges based on the current value: 50 μ A, 0.5mA, 5mA, 50mA, 500mA, and 10A.
4. Ohmic gear (OHM)
When measuring resistance, select this gear and divide it into "x1, x10, x100, xlk, xl0k" and other gears based on the measured resistance value.
5. Transistor amplification factor (hFE)
When measuring the amplification factor of a transistor, select this gear and read directly based on the pointer reading.
6. Beeming gear
Select this gear when detecting diodes.
7. DC voltage mode (DCV)
Select this gear for measuring DC voltage, and choose the following six gears based on the voltage range being measured: 2.5V, 10V, 25V, 50V, 250V, and 1000V.
