05-22-2020 03:07 AM - edited 05-22-2020 03:09 AM
I've got a DAQ NI-USB 6210 and a distance sensor with 0-10V analog output depending on 50-250mm disctance.
Therefore I configured NI Max with an input range of 0-10V.
According to this Accuray table I would measure 10V+2.69mV (accuracy) or 10-2,69mV at 300mm distance.
What about the accuracy at 5V and 100mm distance?
I know that the resoultion with 16 Bit ADC would be better with a 0-5V input range than 0-10V.
But what about the absolute accuracy. Could I measure a 5V signal in 0-10V range with accuracy of 1.4mV to 1,5mV or would be the accuracy from 2 to 2,69mV?
I've got no reference to compare this two configurations.
Nominal Range Positive Full Scale (V) | Nominal Range Negative Full Scale (V) | Residual Gain Error (ppm of Reading) | Residual Offset Error (ppm of Range) | Offset Tempco (ppm of Range/°C) | Random Noise, σ (μVrms) | Absolute Accuracy at Full Scale (μV) | Sensitivity (μV) |
10 | -10 | 75 | 20 | 34 | 229 | 2,690 | 91.6 |
5 | -5 | 85 | 20 | 36 | 118 | 1,410 | 47.2 |
1 | -1 | 95 | 25 | 49 | 26 | 310 | 10,4 |
0.2 | -0.2 | 135 | 40 | 116 | 12 | 88 | 4,8 |
https://www.ni.com/documentation/en/multifunction-io-device/latest/specs-usb-6210/specs/
Solved! Go to Solution.
05-22-2020 09:07 AM
@sensor_programmer wrote:
But what about the absolute accuracy. Could I measure a 5V signal in 0-10V range with accuracy of 1.4mV to 1,5mV or would be the accuracy from 2 to 2,69mV?
There is no 0-10V range available. You will be in the -10-10V range. Therefore your accuracy will be in the 2.7mV range.