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Counter/Timer
Understanding Circuit Timing/Tolerance
Solved!
|
AI, 0 - 100mVdc (5V common) |
Pressure Transducer (PT), Unit=PSI |
7 |
I am trying to understand why these values were used.
why didnt they don't just use
0 mV
25 mV
75 mV
100 mV
why
0 mV
25.3 mV
75.6 mV
100.9 mV
Given the requirements below.
If someone can guide me, it would greatly appreciated. thank you
Pressure Transducer Signal Requirement Tests
|
Test # |
Card # |
Signal # |
Signal Name |
Input (mV) |
Expected (mV) |
Tol (±mV) |
L Limit (mV) |
H Limit (mV) |
Note |
|
|
1 |
1 |
0 |
0.000 |
1.000 |
-1.000 |
1.000 |
|
|
|
|
1 |
2 |
0 |
0.000 |
1.000 |
-1.000 |
1.000 |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
1 |
1 |
|
25 |
25.000 |
2.000 |
23.000 |
27.000 |
|
|
|
1 |
2 |
|
25 |
25.000 |
2.000 |
23.000 |
27.000 |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
1 |
1 |
|
50 |
50.000 |
2.000 |
48.000 |
52.000 |
|
|
|
1 |
2 |
|
50 |
50.000 |
2.000 |
48.000 |
52.000 |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
1 |
1 |
|
75 |
75.000 |
2.000 |
73.000 |
77.000 |
|
|
|
1 |
2 |
|
75 |
75.000 |
2.000 |
73.000 |
77.000 |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
1 |
1 |
|
100 |
100.000 |
2.000 |
98.000 |
102.000 |
|
|
|
1 |
2 |
|
100 |
100.000 |
2.000 |
98.000 |
102.000 |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
2 |
4 |
|
0 |
0.000 |
1.000 |
-1.000 |
1.000 |
|
|
|
2 |
5 |
|
0 |
0.000 |
1.000 |
-1.000 |
1.000 |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
2 |
4 |
|
25 |
25.000 |
2.000 |
23.000 |
27.000 |
|
|
|
2 |
5 |
|
25 |
25.000 |
2.000 |
23.000 |
27.000 |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
2 |
4 |
|
50 |
50.000 |
2.000 |
48.000 |
52.000 |
|
|
|
2 |
5 |
|
50 |
50.000 |
2.000 |
48.000 |
52.000 |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
2 |
4 |
|
75 |
75.000 |
2.000 |
73.000 |
77.000 |
|
|
|
2 |
5 |
|
75 |
75.000 |
2.000 |
73.000 |
77.000 |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
2 |
4 |
|
100 |
100.000 |
2.000 |
98.000 |
102.000 |
|
|
|
2 |
5 |
|
100 |
100.000 |
2.000 |
98.000 |
102.000 |
|
|
|
The pressure transducer circuit SHALL handle the maximum pressure transducer differential input voltage range of 0 mV to +105 mV for the circuits allocated to the pressure transducers used for control.
|
The pressure transducer circuit will handle the maximum pressure transducer differential input voltage range of 0 mV to +133 mV for the circuit allocated to the pressure transducer that reports accumulator pressure, if used.
The pressure transducer circuit will handle the maximum pressure transducer differential input voltage range of 0 mV to +133 mV for the circuit allocated to the pressure transducer that reports supply pressure.
Pressure Transducer Circuit Timing/Tolerance Requirements
|
|
The pressure transducer circuit SHALL have an accuracy of ±0.3 mV or better between the pressure transducer differential analog input to digital data output. |
|
|
The pressure transducer circuit SHALL resolve the pressure to 0.1 mV increments as digital data output. |
@krispiekream wrote:
why didnt they don't just use
Who are "they"? Maybe you should ask them. We can only guess.
Maybe they did a calibration curve for the exact sensor in their possession to correct for nonideality and thus improve precision. I would guess that every sensor is slightly different.
What does this have to do with timing (your subject!)
Are you sure you posted in the right place. I don't understand what a pressure transducer and voltage levels have to do with counter/timer at all? You can probably ask a moderator to move this to a better place, once you decide where that is. Maybe here?
