Optical Axis Fine Adjustment Using the Sound Check
5
To improve accuracy of optical axis
Perform the procedure of “Optical Axis Adjustment Using the Sound Check”, “Optical Axis Fine Adjustment Using the Monitor
Output Voltage”, or “Optical Axis Fine Adjustment Using the Alignment Wireless Checker”.
The sound check function indicates the light reception level by using high and low pitch tones.
The sound check function is only installed on the receiver.
<<Caution>>
First, check only the transmission on the upper level and reception on the upper level , and then check only the transmission on the
lower level and reception on the lower level.
(When the light can be received on both the upper and lower levels, the beep sound at the total light reception level of the upper and lower levels are
generated.)
1. Turn the sound check switch on the receiver
to the ON position.
When the optical axis is roughly aligned, the
beep sound can be heard.
The optical axis is greatly misaligned if no
sound can be heard.
2. Fine adjust the upper level optical axis.
(1) Press the upper/lower changeover switch on
the transmitter to select [Only transmit from
upper].
(2) Press the upper/lower changeover switch on
the receiver to select [Reception authorization
on upper only].
(3) Turn the adjustment screw to fine adjust until
the tone reaches the highest pitch.
(Adjust both the transmitter and receiver.)
3. Fine adjust the lower level optical axis.
(1) Press the upper/lower changeover switch on
the transmitter to select [Only transmit from
lower].
(2) Press the upper/lower changeover switch on
the receiver to select [Reception authorization
on lower only].
(3) Turn the adjustment screw to fine adjust until
the tone reaches the highest pitch.
(Adjust both the transmitter and receiver.)
4. Check if the light from another transmitter enters the receiver.
(1) Press the upper/lower changeover switch on the transmitter
to select [No transmission].
(2) Press the upper/lower changeover switch on the receiver to
select [Reception authorized for both upper and lower].
(3) Check that the alarm LED lights up when the receiver
outputs an alarm signal, and that the sensitivity attenuation
LED also lights up.
If no alarm is activated or the sensitivity attenuation LED is not lit
When using multi-level protection, there may be some effects
of other photoelectric beam sensors. In such case, readjust the
other photoelectric beam sensors to reduce the effects to the
minimum possible.
In addition, check that an appropriate channel is set.
Sound check
switch
Lit
Lit
Lit
Lit
Receiver
Transmitter
４
ON
Lit
Lit
Receiver
Transmitter
Lit
Lit
Receiver
Transmitter
Lit
Off
Receiver
Transmitter
Light reception level
Intermitten tone
Pip (tone : long
←
→
short)
Bleep
Continuous tone
(Good)
High-pitched tone
(Best)
Much
Little
Pip
(Long tone)
Bleep
(High-pitched
tone)
Bleep
(High-pitched
tone)
