10
4 Distance & Spot Size
As the distance (D) from the object increases, the spot size (S)
of the area measured by the unit becomes larger. The relationship
between distance and spot size for each unit is listed below. The
focal point for each unit is 914mm (36”). The spot sizes indicate
90% encircled energy.
D :S=13:1
Sensor Beam
D
30@ 390
10@ 130
50@ 650
m m
D istance(D ) to Spot Size(S)
inch
16m m
1.2@ 15.6
0.4@ 5.2
2.0@ 26
Laser Beam
S
Fig: 1
5 Switching C/F , LOCK ON/OFF and SET
ALARM
①
°
C/°F
②
LOCK ON/OFF
③
SET ALARM
Select the temperature units (
o
C or
o
F) by using the
o
C/
o
F
switch.