Fluke 572 FE 572 Users Manual - Page 13

Spot Size, is 60:1Standard Focus or 50:1 Close Focus - infrared thermometer

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Spot Size STANDARD MODEL Optical Chart DISTANCE: SENSOR TO OBJECT (IN) SPOT DIA. (IN) 0 20 30 36 46 48 60 72 84 100 108 120 0.76 IN @ 46 IN 2.5 2.9 2.3 1.0 0.9 0.87 0.81 0.82 1.2 1.51 1.85 572 SPOT DIA. (mm) 0 100 250 500 1000 1500 2000 2500 3000 24 23 24 19.8 29.0 19 mm @ 1150 mm 44.0 58.0 72.0 SPOT DIA. (IN) DISTANCE: SENSOR TO OBJECT (mm) FOCUS POINT D:S = 60:1 FAR FIELD D:S = 35:1 CLOSE FOCUS MODEL Optical Chart DISTANCE: SENSOR TO OBJECT (IN) 0 2 4 6 7.9 9.8 20 0.24 IN @ 11.8 IN 1 0.9 0.75 0.62 0.49 0.37 0.93 25 22 18,7 15,5 12,3 9,2 23 6 mm @ 300 mm 0 50 100 150 200 250 500 DISTANCE: SENSOR TO OBJECT (mm) FOCUS POINT D:S = 50:1 FAR FIELD D:S = 12:1 40 2.81 Close Focus 70 1000 SPOT DIA. (mm) The measured spot size depends on the distance between the object you are measuring and the infrared thermometer. The relationship between distance and spot size is 60:1(Standard Focus) or 50:1 (Close Focus) at the focus point. The D:S in the far field (>33ft/ 10m) is 35:1 (Standard) or 12:1 (Close Focus). 13

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13
572
STANDARD MODEL
Optical Chart
3000
120
1.0
0
0
24
SPOT DIA. (IN)
SPOT DIA. (mm)
DISTANCE: SENSOR TO OBJECT (mm)
DISTANCE: SENSOR TO OBJECT (IN)
FOCUS POINT D:S = 60:1
FAR FIELD D:S = 35:1
0.76 IN @ 46 IN
19 mm @ 1150 mm
1500
2500
100
60
1.2
2.3
2.9
29.0
58.0
72.0
2000
44.0
1000
500
250
100
24
23
30
0.9
0.81
0.82
1.51
1.85
2.5
19.8
108
84
72
48
20
36
46
0.87
CLOSE FOCUS MODEL
Optical Chart
500
20
1
0
0
0.93
25
23
SPOT DIA. (IN)
SPOT DIA. (mm)
DISTANCE: SENSOR TO OBJECT (mm)
DISTANCE: SENSOR TO OBJECT (IN)
FOCUS POINT D:S = 50:1
FAR FIELD D:S = 12:1
0.24 IN @ 11.8 IN
6 mm @ 300 mm
Close Focus
6
0.62
15,5
150
2
0.9
22
50
4
0.75
18,7
100
7.9
9.8
200
250
0.49
0.37
12,3
9,2
40
1000
2.81
70
The measured spot size depends on the dis-
tance between the object you are measuring and
the infrared thermometer.
The relationship between distance and spot size
is 60:1(Standard Focus) or 50:1 (Close Focus) at
the focus point. The D:S in the far field (>33ft/
10m) is 35:1 (Standard) or 12:1 (Close Focus).
Spot Size