Hitachi RPC-1.5FSR Technical Catalogue page 20

FEATURES
z Sequence of Detection by Motion Sensor
Motion Sensor detects the infrared variation by sensor elements.
Analog voltage is generated according to the infrared variation.
Analog voltage is convert to an digital signal at the threshold.
z Sequence of Controlling Motion Sensor at Indoor Unit
The Indoor unit detects whether someone is present or not according to the condition of the digital
signal.
The Indoor unit measures the frequency of detected human activity for a period of time.
The Indoor unit determines the extent of human activity depending on the calculated reaction rate
(frequency).
*Reaction Rate (Frequency) = Detected Counts of Human Activity / Measured Counts of Time
The Indoor unit changes to each operating mode depending on the extent of human activity and the
elapsed time.
The Indoor unit controls the operation automatically in each operating mode.
Measure the frequency of detected human activity in the period of time.
Sensor
with Digital
Output
Much Human Activity
1-10
Little Human Activity No Human Activity
Detected
Human Activity
No Detected
Human Activity
TCI-20007-rev.1