Operation
Adjustment
Item
Through-beam
Retroreflective Models
Diffuse-reflective
Model
With sensing object
Without sensing object
Setting
Operation (A)
(A)
(A)
(C)Reset
(C)
(B)
Operation
MAX
Like the through-beam model, ad-
just the reflector and emitter/re-
ceiver. Since the directional angle
of the emitter/receiver is 1 to 5°, ad-
just the emitter/receiver especially
carefully.
MIN
MAX
MIN
MIN
MAX
Swing the receiver and emitter ver-
tically and/or horizontally and set
the adjuster in the center of the
range where the indicator of the re-
ceiver turns ON.
Sensitivity
Sensitivity
Sensitivity
E3JK
(1) If you have a sensing object as shown in the figure, turn the sensitivity
adjuster clockwise (increase the sensitivity) until the indicator is turned
ON, and define this adjuster position as (A).
(2) Remove the sensing object, turn the sensitivity adjuster clockwise until
the indicator is turned ON by a background object, and define this posi-
tion as (B).
(3) Turn the sensitivity adjuster counterclockwise (decrease the sensitivity)
from (B) until the indicator is turned OFF, and define this position as (C).
(4) The position in the middle of (A) and (C) is the optimum position. If the
indicator is not turned ON by the background object at the maximum
sensitivity, set the adjuster in the middle of (A) and maximum sensitivity.
The sensitivity adjuster may be damaged if an excessive force is applied.
Precautions
Correct Use
Miscellaneous
E3JK
Ambient Conditions (Installation Area)
Design
The E3JK will malfunction if installed in the following places.
Power Reset Time
• Places where the E3JK is exposed to a dusty environment.
• Places where corrosive gases are produced.
The Sensor is ready to detect an object within 200 ms after it
is turned ON. If Sensor and load are connected to separate
power supplies, ensure to turn ON the Sensor first.
Wiring Considerations
Connection/Wiring
Emitter
Receiver
If the DC transistor output type is used, the sum of load cur-
rents of L-ON output (NO) and D-ON output (NC) should be
within 100 mA. If the sum of load currents exceeds 100 mA,
the load short-circuit protection may be activated. (The load
short-circuit protection is reset by turning OFF the power of
the photoelectric sensor.)
• Places where the E3JK is directly exposed to water, oil, or
chemicals.
Emitter
Receiver
E3JK
7
OMRON [ OMRON ELECTRONICS LLC ]
