APC NetBotz 320 Rack Appliance NBRK0320E User Manual
Product codes
NBRK0320E
Using Your Appliance
141
Advanced View: Defining Thresholds
The sensors used by the appliance fall into two categories: Analog sensors and state sensors. Analog
sensors report sensor readings as a current value within a broad range of potential values defined by a
minimum and maximum value, such as temperature or humidity readings. State sensors, on the other
hand, report sensor readings as one of two mutually exclusive states, such as a door being “open” or
“closed” or motion being “detected” or “not detected.” Due to the differences in the kind of data
reported by these two sensor types, the thresholds that can be applied to each sensor type differ
greatly.
sensors report sensor readings as a current value within a broad range of potential values defined by a
minimum and maximum value, such as temperature or humidity readings. State sensors, on the other
hand, report sensor readings as one of two mutually exclusive states, such as a door being “open” or
“closed” or motion being “detected” or “not detected.” Due to the differences in the kind of data
reported by these two sensor types, the thresholds that can be applied to each sensor type differ
greatly.
Analog Sensor Thresholds
The following threshold types can be assigned to any analog sensor:
• Maximum Value Threshold: An alert condition occurs if the current sensor value exceeds a
specified acceptable value.
• Minimum Value Threshold: An alert condition occurs if the current sensor value falls below a
specified acceptable value.
• Range Threshold: An alert condition occurs if the current sensor value is not within a specified
range of acceptable values.
• Above Value for Time Threshold: An alert condition occurs when the current sensor value
exceeds a specified value for a specified amount of time.
• Below Value for Time Threshold: An alert condition occurs when the current sensor value
falls below a specified value for a specified amount of time.
• Rate of Decrease Threshold: An alert condition occurs if the value reported by the sensor
decreases more than a specified amount within a specified amount of time.
• Rate of Increase Threshold: An alert condition occurs if the value reported by the sensor rises
more than a specified amount within a specified amount of time.
State Sensor Thresholds
The following threshold types can be assigned to any state sensor:
• Alert State Threshold: An alert condition occurs if a specified state is reported by the sensor.
• Alert State for Time Threshold: An alert condition occurs if a specified state is reported by
the sensor for more than a specified time.
• State Mismatch Threshold: An alert condition occurs if any state other than the specified
“normal” state is reported by the sensor.
• State Mismatch for Time Threshold: An alert condition occurs if any state other than the
specified “normal” state is reported by the sensor for more than a specified time.
Defining Analog Thresholds
Detailed instructions on how to define each of the available analog threshold types follow.