٨This is the method of setting the threshold value by teaching only the water absent
condition (not immersed condition).
<Limit teaching>
٨This product incorporates an 'assist function', which helps to easily search the
optimum sensitivity position by blinking of the pointer.
In order to make 'assist function' effective, switch the operation selection switch in the
order L-ON (not immersed ON) ψD-ON (immersed ON) ψL-ON (not immersed ON).
<Assist function>
Notes: 1)
2)
'Assist function' turns off automatically once the sensitivity adjustment has
been completed.
In case 'assist function' is not to be used, set the operation selection switch
to D-ON (immersed ON) and wait for 2 sec., or more, to make 'assist
function' ineffective.
When using the FX-A1(P)
٨
This is the method of setting the sensitivity by teaching two levels, corresponding to
the immersed and not immersed conditions. Normally, setting is done by this method.
<2-level teaching>
Notes: 1)
2)
3)
If the jog switch is pressed continuously 3 sec., or more, full auto-teaching is done. In
case of FD-F8Y, correct threshold value setting cannot be done in full auto-teaching.
If the mode selection switch is changed to 'RUN' when ' ' is being displayed
on the LCD display, the incident light intensity taught at Step Ԝis not recorded.
When the mode selection switch is changed from 'SET' to 'RUN' or from
'MODE' to 'RUN', the set threshold value or the contents of each mode set-
ting are stored in an EEPROM. However, since the EEPROM has a lifetime,
the threshold value setting cannot be done for more than 100,000 times.
Notes: 1)
2)
3)
4)
When 'assist function' is not used, the pointer does not blink.
When 'assist function' is not used, the middle point of and is regarded
as the optimum sensitivity point.
In order to protect the mechanism, the sensitivity adjuster idles when over
turned, which may result in a backlash of 1 to 2 divisions.
Depending upon the sensing conditions, stable sensing may be possible at a
position which is slightly shifted from the optimum sensitivity point.
When using the FX-D1(P)
Notes: 1)
2)
3)
If the jog switch is pressed continuously 3 sec., or more, full auto-teaching is
done. In case of FD-F8Y, correct threshold value setting cannot be done in
full auto-teaching.
If the mode selection switch is changed to 'RUN' when ' ' is being displayed
on the LCD display, the incident light intensity taught at Step Ԝis not recorded.
When the mode selection switch is changed from 'SET' to 'RUN' or from
'MODE' to 'RUN', the set threshold value or the contents of each mode setting
are stored in an EEPROM. However, since the EEPROM has a lifetime, the
threshold value setting cannot be done for more than 100,000 times.
٨
This is the method of setting the threshold value by teaching two levels, corresponding to
the immersed and not immersed conditions. Normally, setting is done by this method.
<2-level teaching>
The fibers are mounted in the tank.
Set the mode selection switch to either 'RUN' or
'MODE'.
Set to either sensing output 1 or sensing output 2 by
turning the jog switch to the '+' or the '-' side.
Set the mode selection switch to 'SET'. The present
threshold value is displayed.
Ԟ
ԟ
ԝ
Ԝ
ԛ
Ԛ
ԙ
Ԙ
The jog switch is pressed in the fiber not
immersed condition and released.
Press the jog switch in the fiber immersed
condition and release it within 3 sec. (Note 1)
Step Display Description
Press
Press
SET MODE
RUN
Set the mode selection switch to 'RUN'.
The threshold value does not change even if the jog
switch is operated.
Ԡ
SET MODE
RUN
SET MODE
RUN
1
2
Sensing
output 1
Sensing
output 2
1
2Tu r n
Incident light
intensity dispaly
If teaching is accepted, the read incident light intensity is displayed for 0.5 sec.
approx., and the threshold value is set to the middle value of the incident light
intensity levels in the fiber immersed and fiber not immersed conditions. After
that, the judgment on the stability of sensing is displayed for 2.5 sec. approx.
In case stable sensing is possible: ' ' is displayed.
In case stable sensing is not possible: ' ' is displayed.
After this, the threshold value is displayed.
Incident light
intensity dispaly
Incident light
intensity dispaly
or
If teaching is accepted, the read incident light intensity is displayed for 0.5
sec. approx. Subsequently, ' ' is displayed on the LCD display. (Note 2)
Operation
Ԝ
ԛ
Ԛ
ԙ
Ԙ
Select either L-ON (not immersed ON) or D-ON (immersed ON) according to your application.
Turn the sensitivity adjuster fully counter-
clockwise.
(Minimum sensitivity)
ڎ
Make sure that the opera-
tion selection switch is set
to L-ON (not immersed ON).
In case 'assist function' is to
be used, switch the operation
selection switch in the order
of L-ON ψD-ON ψL-ON.
Step Sensitivity
indicator
Sensing method
Fiber immersed
Fiber not immersed
0
MAX
0
MAX
ON
0
MAX
OFF
ON
Optimum point
0
MAX
In the fiber not immersed condition, slowly
turn the adjuster clockwise and find the point
where the sensor is switched ON.
The pointer blinks once at the point
. (Note 1)
In the fiber immersed condition, slowly turn
the adjuster further clockwise until the sensor
goes into the ON state again. Once it is
switched on, turn the adjuster counterclock-
wise a little and find the point where it is
switched OFF. The pointer blinks twice at the
point . (Note 1)
If the sensor does not go into the ON state,
MAX is the point .
Turn the adjuster towards the point from
the point slowly. The pointer starts blinking
when it approaches the optimum sensitivity
point and blinks faster at the optimum sensi-
tivity point for 3 sec. This point is the optimum
sensitivity point. (Note 2)
Notes: 1)
2)
3)
If the jog switch is pressed continuously 3 sec., or more, full auto-teaching is done.
In case of FD-F8Y, correct sensitivity setting cannot be done in full auto-teaching.
Also, if the mode selection switch is changed to 'RUN' while level indicators '4'
and '5' are blinking, the incident light intensity taught at Step Ԛis not recorded.
When the mode selection switch is set to 'SET' or 'MODE', the sensor is more
susceptible to extraneous light. Hence, when sensing a liquid, ensure to set the
mode selection switch to 'RUN'.
When the mode selection switch is changed from 'SET' to 'RUN' or from
'MODE' to 'RUN', the set sensitivity or the contents of each mode setting are
stored in an EEPROM. However, since the EEPROM has a lifetime, the sen-
sitivity setting cannot be done for more than 100,000 times.
The fibers are mounted in the tank.
ԙ
Ԙ
Step Level indicators Description
Set the mode selection switch to 'SET'. The
present sensitivity level is displayed.
SET MODE
RUN
ԝ
Ԛ
Ԝ
ԛ
SET MODE
RUN
Set the mode selection switch to 'RUN'. (Note 2)
The sensitivity level does not change even if
the jog switch is operated.
The jog switch is pressed in the fiber not
immersed condition
The stability indicator (green) lights up and the sensitivity level is set
at the middle value of the incident light intensity levels in the fiber im-
mersed and fiber not immersed conditions.
The sensitivity level is then displayed on
the level indicators.
Hundreds position: lights up continuously
Tens position: blinks
Units position: not shown
(e.g.) The level indicators in the figure on
the left show that the sensitivity level
is in the range 720 to 729.
Press the jog switch in the fiber immersed condition. The level
indicators '3' and '6' blink.
Release the jog switch within 3 sec. The
level indicators '4' and '5' blink and the
incident light intensity in the fiber immersed
condition is read. (Note 1)
Press
Press
Sensitivity
level
Fiber
immersed
Fiber not
immersed
High
Low
Incident light
intensity
Step Display Description
SET MODE
RUN
SET MODE
RUN
SET MODE
RUN
The fibers are mounted in the tank.
Set the mode selection switch to either 'RUN' or
'MODE'.
Set to either sensing output 1 or sensing output 2 by
turning the jog switch to the '+' or the '-' side.
Set the mode selection switch to 'SET'. The present
threshold value is displayed.
Ԟ
ԟ
ԝ
Ԝ
ԛ
Ԛ
ԙ
Ԙ
Press the jog switch in the fiber not immersed
condition and release it within 3 sec. (Note 1) Press
Set the mode selection switch to 'RUN'.
The threshold value does not change even if the jog
switch is operated.
Ԡ
1
2
Sensing
output 1
Sensing
output 2
1
2Tu r n
Incident light
intensity dispaly
' ' is displayed on the LCD display.
After this, the threshold value is displayed.
Incident light
intensity dispaly
If teaching is accepted, the read incident light intensity is displayed for 0.5
sec. approx. Subsequently, ' ' is displayed on the LCD display. (Note 2)
Turn the jog switch to the '+' side.
The threshold value is shifted to a value appox. 15% lower
(higher sensitivity) than that set at step Ԝ.
㪫㫌㫉㫅㩷㫋㫆㩷㩾㪂㩾㩷㫊㫀㪻㪼
15%
0
100%
High
Low
Turn to '-' side
ON
OFF
Threshold
value
Incident light intensity
with fiber not immersed
Threshold value
