Fluke endurance series, User Manual

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Innovative High Temperature Fiber Optic Infrared Pyrometers
Technical Data
11
3.4.1. Measurement spot size regarding the selected focus and model options
The properties of Endurance
®
fiber optic infrared pyrometers are:

Fixed focus

LASER sighting/pointing option

Small fiber optic attached sensor head with up to 22m (866 in) specific fiber cable
Three fixed focus distances are optional orderable:

F0 models focus at 100mm (4'')

F1 models focus at 300mm (12'')

F2 models focus at infinity (∞)
For measurements performed in the 1-Color mode, make sure that the target completely fills
the measurement spot.
Figure 2: Example of Spot size propagation for a F2 (Standard Focus) option model
The focus and model options determine the spot size propagation, regarding
the distance between the sensor head and the measurement spot. All option
dependent spot size propagation diagrams are shown below.
Spot

S [m
m]
Distancse D to Object [mm]
D:S = 20:1 at focus point
Spot

S [i
nc
h]
[inch]