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Measurement double potentiometer details
Article Source：iizq.cn
Edit:Soundwell
issuing time：2015-11-30
Convinced of the need to use adjustable potentiometer friends will want to know the double potentiometer correct measurement method, today, up to a common Electronic 100K, 3 feet adjustable rotary potentiometer for example:
Adjustable potentiometer two fixed end as A, B, intermediate slider is C, then:
1, measuring the resistance between A-B, should 100K;
2, measured between the A-C, resistance between B-C, the two resistance value and should be 100K (or substantially equal);
3, rotation of the adjustment process at any location shall meet the conditions 2;
4, the knob counterclockwise adjusted to 0, then the resistance between the B-C is "0", the resistance between the A-C is "100K";
5, fixed access measuring points B, C, knob from "0" point gradually adjusted to the maximum resistance value, the B-C should change between the knob position (angle) was the same proportional change;
6, if it is a special potentiometer (logarithmic) is "proportional" relationship condition 5 should be "log."
7, it is customary, the three point B should correspond to the circuit signal "0" level, A corresponds to the "max" (signal input), C is the output signal conditioning. A, B can be reversed, but adjust the opposite habit.
First determine your "idiom";
If the "counter-clockwise" to decrease, "Clockwise" is increased, the first counter-clockwise adjusted to 0, find the "resistance" of 0 to 2 points, the rest is A;
A knob to any intermediate position measuring point A and the other two points of resistance, resistance to maintain 100K unchanged, the point is B.
In fact, is based on the relationship Rab = Rac + Rbc determined C.
Between the two took a larger input.
Adjustable potentiometer measuring method of the above explanation to understand it? You can use under actual operating Oh!
Adjustable potentiometer two fixed end as A, B, intermediate slider is C, then:
1, measuring the resistance between A-B, should 100K;
2, measured between the A-C, resistance between B-C, the two resistance value and should be 100K (or substantially equal);
3, rotation of the adjustment process at any location shall meet the conditions 2;
4, the knob counterclockwise adjusted to 0, then the resistance between the B-C is "0", the resistance between the A-C is "100K";
5, fixed access measuring points B, C, knob from "0" point gradually adjusted to the maximum resistance value, the B-C should change between the knob position (angle) was the same proportional change;
6, if it is a special potentiometer (logarithmic) is "proportional" relationship condition 5 should be "log."
7, it is customary, the three point B should correspond to the circuit signal "0" level, A corresponds to the "max" (signal input), C is the output signal conditioning. A, B can be reversed, but adjust the opposite habit.
First determine your "idiom";
If the "counter-clockwise" to decrease, "Clockwise" is increased, the first counter-clockwise adjusted to 0, find the "resistance" of 0 to 2 points, the rest is A;
A knob to any intermediate position measuring point A and the other two points of resistance, resistance to maintain 100K unchanged, the point is B.
In fact, is based on the relationship Rab = Rac + Rbc determined C.
Between the two took a larger input.
Adjustable potentiometer measuring method of the above explanation to understand it? You can use under actual operating Oh!
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