Monitron data export v2 vibration values do not match CSV download data from app

Question

I cannot find a correlation in the data export raw data values (kinesis) that correlates to the data values in the app.

I've read in another post that total_vibration = sqrt(x^2 + y^2 + z^2), 
this seems to be already calculated in the data export (as I would expect) -- 
>"band10To1000Hz": {
                        "totalVibration": {
                            "absMax": 0.4646,
                            "absMin": 0,
                            "crestFactor": 3.6282,
                            "rms": 0.1281
                        },
                        "xAxis": {
                            "rms": 0.0407
                        },
                        "yAxis": {
                            "rms": 0.1126
                        },
                        "zAxis": {
                            "rms": 0.0455
                        }

When I go in the app, and download the CSV file, the records shown at the same timestamp as what is listed above do NOT match whatsoever. Is there a different calculation or reading that provides data to the app?

In the example above, the totalVibration RMS is 0.1281, within the app for the same timestamp the total vibration rms shows 0.055.

Answer

There could be a few reasons for the difference in total vibration RMS values between what is shown in the raw export data versus the mobile app:

* The app may apply additional filtering, averaging or calculations to the raw sensor data before displaying results.
* There could be minor delays between when the data is captured by the sensor and exported versus when it is processed and displayed in the app.
* The coordinate system or units of measurement may differ between the raw data export and what is used in the app's calculations and display.

To better understand what calculations or processing is done before displaying results in the app, I'd recommend checking the app documentation or contacting AWS Support. You could also try exporting raw acceleration data from the sensor itself to compare directly with the Kinesis export values.

Some things to check in the raw export data include:

* Verifying the timestamps match between records
* Comparing the individual x, y, z axis RMS values
* Calculating your own `sqrt(x^2 + y^2 + z^2)` to see if it matches `totalVibration`

Monitron data export v2 vibration values do not match CSV download data from app

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