GE Multilin 350, Operation & Maintenance Manual

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2 Fluke Corporation CLKT C-Range Infrared Window for outdoor applications
3460346 FLK-050-CLKT 3460387 FLK-075-CLKT 3460439 FLK-100-CLKT
Optic data
Crystal insert diameter 50 mm (1.97 in) 75 mm (2.96 in) 100 mm (3.94 in)
Viewing aperture diameter 43 mm (1.7 in) 68 mm (2.7 in) 89 mm (3.5 in)
Viewing aperture area 1452 mm
2
(2.25 sq in) 3632 mm
2
(5.63 sq in) 6322 mm
2
(9.79 sq in)
Thickness 2 mm (0.08 in) 2 mm (0.08 in) 4 mm (0.16 in)
CLIRVU coating Yes
Shortwave IR capable Yes
Midwave IR capable Yes
Longwave IR capable Yes
Ultraviolet (UV) capable Yes
Visual capable Yes
Fusion capable Yes
Underwriters Laboratories (UL) recognized Yes
UL50 environmental Type 3/12
UL746C N/A (Polymer Free)
UL94 N/A (Polymer Free)
Canadian Standards Association (CSA) approval Yes
Environmental Type 3/12
KEMA (Arc-Testing)
ANSI C37.20.7 50 kA for 30 cycles @60 Hz
EEMACS 14-1 Type-B 40 kA for 30 cycles @60 Hz
ASTA (Arc-Testing)
IEC 62271 20 kA for 5 cycles @50 Hz
TUV
Cyclic humidity withstand Yes
Vibration withstand Yes
NEMKO
Resistance of insulating materials to 100° Yes
Resistance of insulating material to ball pressure (Brinell) Yes
Glow-wire test 650 °C Yes
Lloyds Register
Up to 11 kV marine switchgear, indoor or outdoor Yes
Detailed specifications
Why is available area important?
Understanding the difference between “Optic Diameter”
and “Available Area” gives the thermographer a measure
of how much infrared energy is passing through the
window. The more energy, the better the reading. The
entire area of a crystal IR Window is available for infrared
transmission for optimum repeatable results.
Mesh grids may have a larger “optic diameter” but the
grid itself blocks the IR signal. The amount of radiation
available to the camera via mesh windows is significantly
reduced and the signal may be irregular.