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Repeated measurements

A project log for Fully analog digitally controlled voltage source

Voltage is set with three BCD switches with a step of 10mV

klimaKlima 06/04/2023 at 15:460 Comments

I performed an additional set of measurements for the second prototype using a different voltmeter: Solartron 7150+.

Below you can find results and the graphs with new measurements added. The new measurements seem to confirm the previous measurement results.

Ambient temperature during measurements: 23°C

Supply voltage: 9.99V

Voltmeter used: Solartron 7150+

Prototype #2
set value [V] measured value [V] error [mV] error [%]
0 0.003369 3.369 ---
0.15 0.149463 -0.537 -0.358
1.34 1.338665 -1.335 -0.100
1.79 1.788334 -1.666 -0.093
2.12 2.11797 -2.030 -0.096
3.12 3.11701 -2.990 -0.096
3.77 3.7666 -3.400 -0.090
4.33 4.32482 -5.180 -0.120
4.85 4.84432 -5.680 -0.117
5.25 5.24366 -6.340 -0.121
6.49 6.48202 -7.980 -0.123
6.95 6.94179 -8.210 -0.118
7.28 7.27105 -8.950 -0.123
8.28 8.27135 -8.650 -0.104
8.66 8.65086 -9.140 -0.106
Relative error with dots indicating measurement results: green - prototype #1, red - prototype #2, blue - prototype #2, Solartron voltmeter
Absolute error with dots indicating measurement results: green - prototype #1, red - prototype #2, blue - prototype #2, Solartron voltmeter

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