Digital I/O functionality<br> <br> 13.1 FLIR A310 and A320<br>• The state (high or low voltage) on an input pin is used to start an event in the camera, for instance set a flag in the image stream or trig an alarm activity.<br>• The state (high or low voltage) on an output pin is controlled by an activity in the camera, for instance by the result of an alarm detection<br>See the section 16 Technical data, page 27 for details on voltages, etc.<br> 13.2 FLIR A315 and A325 (A320G)<br>• The state (high or low voltage) on an input pin is used to mark images for use by an application.<br>• The state (high or low voltage) on an output pin is controlled by an application.<br>See the section Technical data for details on voltages, etc.<br> <br>14 Temperature screening<br> <br> 14.1 Applicability<br>This section applies to the following camera models:<br>• FLIR A320 Tempscreen (30 Hz).<br>• FLIR A320 Tempscreen (9 Hz).<br> 14.2 Description of the function<br>The screening function in allows you to screen a large number of persons for facial temperatures that lie above a set reference temperature.<br>When an elevated temperature is detected, the camera will trigger a visible and/or audible alarm. Note<br>• You can change the temperature by 2°C (3.6°F) (described below) using the Screening tab in FLIR IR Monitor (included on the ThermoVision System Tools & Utilities 1.5.1 HF2 (1.5.1.16)). HF2 can be downloaded from http://support.flir.com.<br>• The camera should run for at least 30 minutes before carrying out measurements.<br>• The distance to the face should be adapted so that the face covers more than 75% of the image width.<br> 14.3 Procedure<br>Follow this procedure:<br>1. Connect the camera to a video monitor.<br>2. Connect the camera to power.<br>3. Connect the IN 1 port to +10–30 V DC, using cables and an NO (normally open) electrical switch.<br>4. Aim the camera at a face (at the inner corner of an eye) that is assumed to have a normal temperature. Close the switch for a period of less than 2 seconds to acquire a temperature sample. Repeat this procedure on at least 10 faces that are assumed to have a normal temperature. You have now set the reference temperature. If you want to reset or restart the reference temperature, close the switch for a period of more than 2 seconds. See the schematic drawing on the next page for set-up details.<br>5. You can now begin screening. Aim the camera at the faces of people whose facial temperature you want to screen (at the inner corner of the eye). If a person’s facial temperature is more than 2°C (3.6°F) above the set reference temperature, an alarm will be triggered.<br>14 Temperature screening
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