ThermovisionFLIR SR Series Installation and Operation Manual

427-0042-00-10 Revision 130                       Copyright © 2011 FLIR Systems, Inc.   11 
Prior to changing a fuse, turn off the electrical circuit or completely disconnect the camera. 
Make certain that no dangerous condition exists before restoring power. Replace the fuse with a 
fuse that is of the same rating and proper for the circuit. Never use anything other than a fuse of 
proper rating. 
 
 
3.4 Serial Communications 
For serial communications, there are several choices available to the...

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The serial cable should be 100 ohm impedance twisted pair with an overall shield. For RS-232, 
the cable length should be no longer than 50 feet; for RS-422 the cable should be no longer 
than 4000 feet. Many laptops may not have a standard 9-pin serial port, and therefore a device 
such as a USB-serial adaptor may be needed. 
3.5  Sealed Cable Glands 
Cables enter the SR-Series cameras through liquid-tight...

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3.6  Analog Video Output 
The analog video signal is accessed via a standard coaxial cable BNC connector and meets the 
requirements of NTSC or PAL video standards, depending on the configuration ordered. The 
analog video signal is intended to drive video coaxial cable (RG-59 or equivalent) and is 
designed to transmit a 75 ohm load with minimum signal loss. Excessive signal loss and 
reflection occurs if cable...

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4 INSTALLATION 
Prior to installing the SR-Series camera, be sure to review the general installation procedures 
given above. Each camera system has a fixed-focus lens and it is not necessary to adjust the 
focus when the camera is installed. 
Be sure to insert the cables through the cable glands on the rear of the enclosure before 
terminating and connecting to the camera (the terminated cable will not fit...

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4.2  DIP Switch Settings 
The serial protocol (RS-232 or RS-422) is configurable via a DIP switch on the cameras. 
Switch On  Off 
1  Enables 100 ohm 
termination resistor 
(set to On for RS-
422) Removes termination resistor 
(set to Off for RS-232 
communications) 
2 Enables RS-232 
communication Enables RS-422 communication 
 
Note: Daisy-chaining of cameras (point to multi-point configuration) is not supported...

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4.3 Camera Installation 
Instructions for connecting the power, video and communication leads to the camera are given 
below. The power and serial communication leads attach to a detachable connector which is 
inserted into a mating connector on the interface board, as shown in Figure 4-3: SR-Series 
Connections. The power and serial communication leads attach to the detachable connector 
according to Table 1:...

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Figure 4-3: SR-Series Connections 
Installation Steps 
1.  Route the RG-59 video cable through the right-hand gland (when viewing from the rear) 
on the rear enclosure cover and crimp the connector to the end of the cable. Connect 
the cable to the BNC bulkhead connector. 
2.  If necessary, set the SW1 DIP Switches according to the preferred RS-232 or RS-422 
configuration.  
3.  Make sure that the O-rings...

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Figure 4-4: Tongue and Groove Alignment 
5.  Secure the front cover to the enclosure using the included screws. If the ground cable 
inside the enclosure was disconnected, reconnect it to the ground lug on the rear plate 
of the enclosure. Connect the Earth Ground lead to the Earth Ground Lug on the inside 
of the rear of the enclosure (refer to Figure 3-2: Earth Ground Connection). 
6.  Insert the enclosure...

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5  OPERATING THE SR-SERIES THERMAL CAMERA 
5.1  Advantages of Thermal Imaging 
Originally developed for the military, thermal imaging cameras are now deployed in numerous 
commercial applications where it is impractical or too expensive to use active illumination 
(lights). They are perfect for wide-area surveillance in critical infrastructure or high-value 
residence installations where lighting is unwelcome or...

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While the imagery you will see on the monitor may at first look similar to ordinary black and 
white daylight video, as you get familiar with the camera you will appreciate the characteristics 
that make thermal imaging distinct.  A few tips on how to interpret some of the imagery will help 
you to make the most of your system.  
The thermal imager inside the camera does not sense light like conventional cameras;...