Digital multimeter ohm scale reading
There are generally three sets of scales on the surface of a multimeter. One set is a linear scale: both voltage and current use this set of scales. The maximum value of this group of scales (the rightmost end) is the range of voltage and current, which can be read in equal parts. (Only the AC voltage 10V gear in this group is independent.) The innermost circle is a logarithmic scale - the decibel scale. The outermost ring is the electrical barrier, and the reading method is from right to left. The right side is 0 and the left side is infinity. The center resistance is the internal resistance of the block. The actual value is the surface reading multiplied by the magnification.
When the 200ohm setting is reached, the digital unit displayed is ohms;
The unit displayed for the on-off gear is also ohms;
When the kilo-ohm range is reached, the digital unit displayed is Kohm;
The unit displayed in the megaohm range is megaohms.
The resistance level is 200 ohms, the unit is ohms,
The units of 2K and 20K are both kilohms.
Therefore, the reading plus the unit is the real value.
Because the maximum range of the 200 ohm range is 200, 30 is fine.
But the maximum range of 2K is 2, and 30 will not be displayed.
The maximum range of 20K is 20, and 30 will not be displayed.
If the readings are all 1
The order is 1 ohm, 1 kilo ohm, 1 kilo ohm
The resistance range is 200 ohms, and the unit is ohms. The units of 2K and 20K are both kiloohms. Therefore, the reading plus the unit is the real value. Because the maximum range of the 200 ohm range is 200, you can choose 30, but the maximum range of 2K is 2, and 30 will not be displayed. , the maximum range of 20K is 20, and 30 will not be displayed. If the readings are all 1, they are 1 ohm, 1 kilo ohm, and 1 kilo ohm.
The week of the selector switch is divided into five areas:
The top end is the AC voltage level, and the second area to the right is the resistance level.
The third area is the transistor test range, the fourth area is the DC current level, and the fifth area is the DC voltage level.
There are five gears in the resistance gear:
X1;X10;X100;X1K;X10K
The basic unit of resistance is ohms. When reading the value, multiply the number where the pointer stops by the gear magnification of the switch to get the actual resistance value.
For example: when testing the resistance, the pointer stops at 30 on the resistance scale on the dial, and the switch is in the X1 position, then the resistance is 30 ohms.
If the switch is in: X10 position, it is 300Ω, X100 position is 3000Ω (3K),
X1K level is 30KΩ, X10K level is 300KΩ
The rest can be deduced.
