Datasheet

EE-SY671/672
101
Sensitivity Adjustment with Background Object
Sensitivity Adjustment with No Background Object
Point A Point B Setting Check
Sens-
ing
condi-
tions
Ad-
juster
indi-
cator
Adjustment
Procedure
1. Set the sensitivity of the
photomicrosensor to
minimum, place the sensing
object in the sensing
position, turn the sensitivity
adjuster clockwise slowly
until the light indicator is lit
(point A).
2. Remove the sensing object,
at which time the light
indicator will be OFF.
Further turn the sensitivity
adjuster clockwise slowly
until the light indicator is lit
again (point B). The
operation indicator will not
light again if the background
object does not reflect light,
in which case refer to
‘Sensitivity Adjustment with
No Background Object”.
3. Set the sensitivity adjuster
at the center (point C)
between point A and B.
Points A and B will be very
close if the sensor is
influenced by excessive
light reflected by the
background object, in which
case take the following
preventive measures.
(1) Separate the sensor and
the background object
by a distance of 20 mm
min.
(2) Cover the surface of the
background object with
a material with a small
reflection factor, such as
black sponge.
4. After setting the sensitivity
adjuster to point C, check if
the light indicator is lit on
placing the sensing object at
the sensing position and not
lit on removing the sensing
object.
Point A Point B Check
Sens-
ing
condi-
tions
Ad-
juster
indi-
cator
Adjustment
Procedure
1. Set the sensitivity of the
photomicrosensor to
minimum, place the sensing
object at the sensing
position, turn the sensitivity
adjuster clockwise slowly
until the light indicator is lit
(point A).
2. Set the sensitivity adjuster
at the center (point C)
between points A and B (the
point where the sensitivity is
maximum).
3. After setting the sensitivity
adjuster to point C, check if
the light indicator is not lit on
removing the sensing
object.
Background object
A
Background object
B
Background object
Black paper with small
reflection factor
C
B
C
A
B
C
A
C