Activethreshold And Inactivethreshold; Offset Calibration; The X, Y, Z Axis Direction Of R718E - netvox R718E User Manual

5.1 ActiveThreshold and InActiveThreshold

Formula
Active Threshold
InActive Threshold
Example

5.2 Offset calibration

The accelerometer is a mechanical structure that contains components that can move freely.
These moving parts are very sensitive to mechanical stress, far beyond solid-state electronics.
The 0g offset or offset is an important accelerometer indicator because it defines the baseline used to measure acceleration.
After installing R718E, turn on the device and wait for the device join the network 1 minute, the device will automatically
offset the calibration.
If the device installation position moves, you need to power off the device 1 minute and restart turn on.

5.3 The X, Y, Z axis direction of R718E

Active Threshold (or InActiveThreshold) = Critical value ÷ 9.8
* The gravitational acceleration at standard atmospheric pressure is 9.8 m/s
* The scale factor of the threshold is 62.5 mg
Active Threshold can be changed by ConfigureCmd
Active Threshold range is 0x0003-0x00FF (default is 0x0003);
InActive Threshold can be changed by ConfigureCmd
InActive Threshold range is 0x0002-0xFF (default is 0x0002)
Assuming that the critical value is set to 10m/s
10/9.8/0.0625=16.32
Active Threshold (or InActiveThreshold) to be set integer as 16.
2
, the Active Threshold (or InActiveThreshold) to be set is
7
÷ 0.0625
2