ATIM Cloud Wireless ACW Series Manual do utilizador - Página 8

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Operating modes of the PIR

Each device of the ACW-PIR range can be configured in 2 different radio operating modes. By default, the products are

delivered in "counting" mode.

a. Counting mode

In this mode, the product sends back a periodic frame containing the number of detections made in a time interval.

This mode is useful for analyzing the occupancy rate of a room or place during the day, or for counting passages of

people or vehicles at a specific location.

CAUTION: The methods for detecting presence may change from one product to another. Remember to refer to the

corresponding Optex documentation to learn more about the detection method.

Product

ACW-PIR360-I

ACW-PIR90-I

ACW-PIR180-O

ACW-PIR90-O

ACW-ILB30

ACW-ILB100

From the minimum time between 2 detections Tm and the emission period of the sensor Te, it is possible to estimate

the filling rate of a room over the given period using the formula:

Tx = Nd / (Te / Tm) with Tx, the rate in %, Nd the number of detections done within the hour

Example: With a PIR-90-I configured for emissions every hour, which has counted 23 detections within a period.

The more the period Te is reduced, the more the product consumes, but the more precise we can be on this

measurement over time.

Minimum time between 2 detections

5s minimum / 120s recommended

Then: Nd = 23, Te = 60min, Tm = 2 min

Tx = 23 / (60 / 2) = 23 / 30 = 0.76 = 76%

ATIM_ACW-PIR_UG_EN_V1.4

2 minutes