13
Orifice Kit (Optional)
An orifice may be used to restrict the scanner’s field of view aiding discrimination between the tar-
get flame and other flames in the combustion chamber. An orifice may also be used to reduce the
total amount of radiation reaching the scanner, thereby avoiding the chance of saturation. Orifice kit
(P/N 53-121) contains nine different orifice sizes, and two retaining clips. The orifice can be
installed either within the 60-1664 swivel mount, within the 60-1199 coupling, or within the 60-
2919-1, 60-2919-2 surface mounting flange. Refer to figures 11 and 12.
Cooling Cover/Vortex-Tube Cooler Kit (Optional)
For high ambient temperature applications, a Cooling Cover (p/n 60-2930-x) and Vortex-Tube
Cooler Kit (P/N 60-2720) are available. Refer to bulletins 133-749 and CU-103 for details.
