RayTek MARATHON MM SERIES User Manual

Technical Data
16 Rev. D7 Jul 2017 Marathon MM
3.2 Optical Specifications
In all cases, make sure the target completely fills the measurement spot, see section 6.1.1 Distance to
Object, page 26.
The actual spot size for any distance, when the unit is at focus distance, can be calculated by using the
following formula. Divide the distance D by your model’s D:S number. For example, for a unit with D:S
= 300:1, if the sensor is 2200 mm (86 in.) from the target, divide 2200 by 300 (86 by 300), which gives you
a target spot size of approximately 7.3 mm (0.29 in.).
Figure 1: Spot Size Chart
All target spot sizes indicated in the optical diagrams are based on 90% energy.
3.2.1 Variable Focus
Model
Focus
Focus Range
Optical
Resolution D:S *
Smallest Spot Size
LT, MT, G5, 3M
VF1
200 mm (7.9 in.) to 2200 mm (86.6 in.)
70:1
2.9 mm @ 200 mm
(0.11 in. @ 7.9 in.)
G7
VF1
200 mm (7.9 in.) to 2200 mm (86.6 in.)
100:1
2 mm @ 200 mm
(0.08 in. @ 7.9 in.)
1ML, 2ML
VF1
300 mm (11.8 in.) to 2200 mm (86.6 in.)
160:1
1.9 mm @ 300 mm
(0.07 in. @ 11.8 in.)
1MH, 2MH
VF1
300 mm (11.8 in.) to 2200 mm (86.6 in.)
300:1
1 mm @ 300 mm
(0.04 in. @ 11.8 in.)
* Optical Resolution is achieved for each focal point in the focus range
Mean Time Between Failures (MTBF) 10,000 operations (at Tamb = 23°C/74°F)
D = Distance
S = Spot size

RayTek MARATHON MM SERIES Specifications

General

Brand	RayTek
Model	MARATHON MM SERIES
Category	Thermometer
Language	English