Infrared Thermometer
Calibration
7
Table 2. Recommended Reference Equipment and Specifications
Procedure
Visual Inspection
Inspect the DUT for visual signs of damage. If you find a problem, correct it before you continue
with this procedure. Examine the lens for debris or damage. If negligible dirt or damage is found,
proceed with the test.
Inspect the black body source and make sure that the display works correctly and that the target
is clean and free of any debris, contamination (fingerprints or chemical stain), and that the paint is
in good condition with no visible scrapes or cracks. Make sure that the vent fan, fan grill, and vent
ports are clean and free of dust and debris.
Inspect the reference thermometer for damage such as bends or dents in the sheath and cracked
or frayed cabling. Ensure the thermometer fits easily into the 4180 measurement well.
Setup
Fluke highly recommends that a calibration fixture be used.
Black Body Source
The calibration station consists of black body sources that are measured by a precision
thermistor thermometer and a thermometer readout. This combination of equipment is referred to
as the Precision Black Body Source (PBBS).
Classification
Minimum Use Specifications
Suggested Equipment
Black Body Source
Range:
Stability:
Resolution:
True Emissivity:
20
°
C to 50
°
C
0.1
°
C
0.01
°
C
>0.9
Fluke Calibration 4180
Reference
Thermometer
Readout
Range:
Uncertainty:
5 k
Ω
to 10 k
Ω
100
µ
Ω
/
Ω
(0.003
°
C)
Fluke Calibration 1504
or better
Reference
Thermometer
Sheath Diameter:
Sheath Length:
Range:
Uncertainty:
1/8 in
6 in or 9 in
0
°
C to 50
°
C
0.01 °C calibration
0.01 °C long-term drift
Fluke Calibration 5610
