| T O P I C R E V I E W |
| mozobata |
Posted - 07/06/2017 : 02:02:06
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.
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| 2 L A T E S T R E P L I E S (Newest First) |
| anniel |
Posted - 07/16/2017 : 04:33:50
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
Good explanation. |
| supervizeur |
Posted - 07/09/2017 : 13:55:37
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 |
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