quote:

---

Originally posted by mozobata



Regards,

I've seen a few sensors which its datasheet claims to have a better resolution than the mean accuracy. I understand resolution as the lower identifiable value of the measurement; and, as so, half of it is the lower movement that you can see.

For example, the ds18b20 1-wire temperature sensor:

its 12bits AD resolution are analog to a 0.0625V value, and the typical error is given by:

ds18b20 typical error curve

so, suppose that I need to monitor a liquid that is between 30 and 70#186;C; that fantastic resolution a third than the mean error for that gap.

I tend to think that I could extrapolate the mean curve and, in function of the current point, adjust the resolution.

But, in other example, this is the specification values for the BME280 (t/p/h) temperature sensor:

bme280 temperature characteristics

In this case I have a 0.01#186;C resolution with a 0.5#186;C accuracy (at best); but no error distribution chart.

So.. What it is for!??

Thanks in advance.

---

quote:

---

Originally posted by supervizeur

quote:

---

Originally posted by mozobata



Regards,

I've seen a few sensors which its datasheet claims to have a better resolution than the mean accuracy. I understand resolution as the lower identifiable value of the measurement; and, as so, half of it is the lower movement that you can see.

For example, the ds18b20 1-wire temperature sensor:

its 12bits AD resolution are analog to a 0.0625V value, and the typical error is given by:

ds18b20 typical error curve

so, suppose that I need to monitor a liquid that is between 30 and 70#186;C; that fantastic resolution a third than the mean error for that gap.

I tend to think that I could extrapolate the mean curve and, in function of the current point, adjust the resolution.

But, in other example, this is the specification values for the BME280 (t/p/h) temperature sensor:

bme280 temperature characteristics

In this case I have a 0.01#186;C resolution with a 0.5#186;C accuracy (at best); but no error distribution chart.

So.. What it is for!??

Thanks in advance.

---

h**p://kb.mccdaq.com/KnowledgebaseArticle50043.aspx

---