R360 MHM

8.7 Dashboard FAQ: Dynamic AI Threshold FAQs

Updated on

What Sensors is Dynamic AI thresholds for?

At this time, dynamic AI thresholds are developed for:

  • Type 80 One Channel Vibration Sensor Plus
  • Type 81 Two Channel Vibration Sensor Plus
  • Type 82 Predictive Maintenance Sensor Plus
  • Type 84 Non-Tethered Vibration Sensor

How often does the Dynamic AI Threshold evaluate?

  • Once the sensor is installed, the AI will evaluate based on the number of data points.
  • After it has collected 30 data points, an initial threshold will be set. This threshold will dynamically change as additional data is collected until a total of 240 data points are collected.
  • Once 240 samples have been collected, the AI will harden the threshold against the device and lock it in.
  • The device may be triggered for threshold re-evaluation using a button on the dashboard to restart this process using the most recent 240 data points.

 

What if the vibration values are too low?

  •  The AI uses a deadband value to zero out and not take into consideration vibration values below a certain value.
  • Only values above the deadband are considered for thresholding.
  • If, after 30 values above deadband, the threshold decided upon is still very low, the AI will default the threshold to 0.5G.

 

What if the machine is not running during baseline?

  • If the machine is not running, the vibration should fall below the deadband, and the AI will not accumulate the necessary 30 data points to begin thresholding.

 

What if I want to re baseline?

  • A button will be added to the threshold that allows a user to initiate a re-baseline using the most recent 240 data points.

 

How do I see the dynamic threshold it set?

  • Warning and Critical thresholds can still be set after the AI has solidified its thresholds to override the AI determined thresholds.

 

Will this generate an event/alert/email/text?

  • Yes, the alerts will come, via email, sms and creation of an event in the dashboard.

 

Will this override the existing warning/critical thresholds?

  • Yes, the AI determined thresholds will override the existing Warning/Critical thresholds.
  • Please note, that as part of this change, thresholds will be disabled when a sensor is created/adopted into the dashboard.
  • Only once the sensor has accumulated enough data to begin thresholding (30 data points) will thresholds be calculated, enabled and alerting can begin.

 

For the dynamic AI threshold, how many data points above threshold before an alert is triggered?

  • Three data points must be above threshold, in a row before the alert is triggered.
  • This value may be adjusted as desired.

 

What attributes are evaluated for dynamic thresholds?

  • RMS Acceleration of the X, Y, and Z axis, and Temperature (Vibration Probe) Max.
  • Other measurements like velocity/displacement are in development.

 

Can the AI Dynamic Threshold be turned Off?

  • Yes, the AI determined threshold has an Enable/Disable button just like the other thresholds.

 

Does the AI Dynamic Threshold Respect Maintenance Mode?

  • Yes, if a sensor is in maintenance mode, and breaches a Dynamic AI Threshold, it will NOT Generate an alert.

 

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