1 about maintenance, About maintenance, 2 performing maintenance on the electrode probe – KEYENCE SJ-M201 User Manual
Page 12: Performing maintenance on the electrode probe, 1 timing charts, Timing charts
12
4-1
About Maintenance
Maintenance must be performed periodically to ensure that the static elimination performance of the
SJ-M Series is maximized. Maintenance personnel should thoroughly read the descriptions under
"Safety Information for SJ-M Series" (
page 1), and perform maintenance according to the
following points.
About Maintenance
When the SJ-M Series is used for a long period of time, the electrode probe may become dirty due to
the adhesion of dust and dirt.
If the ion level alarm indicator lights, clean the electrode probe. If the electrode probe is used in a dirty
or dusty state, static elimination performance can no longer be fully achieved, resulting in accidents or
malfunction. We recommend periodically cleaning the electrode probe (as a guideline, once every two
weeks in a regular operating environment, though this depends on the installation conditions).
If cleaning the electrode probe does not improve the static elimination performance, or the ion level
alarm indicator frequently lights, replace the electrode probe.
• The SJ-M Series uses high voltage. Before starting maintenance, be sure
to turn the power OFF. Failure to do so might result in electric shock or
malfunction.
• Do not directly touch the electrode
probe. Take care not to touch these
probes even if the power is turned OFF.
Directly touching these probes may
cause personal injury.
CAUTION
4-2
Performing Maintenance on the Electrode probe
When the SJ-M Series is used for a long period of time, the electrode probe becomes dirty due to the
adhesion of dust and dirt.
If the electrode probe is used in a dirty or dusty state, static elimination performance can no longer be
fully achieved, resulting in accidents or malfunction. Be sure to periodically perform maintenance on
the electrode probe.
Performing Maintenance on the Electrode probe
■ How to clean the electrode probe
Clean the electrode probe gently with a cotton swab
moistened with alcohol.
■ How to replace the electrode probe
Note: If cleaning the electrode probe does not improve static elimination performance, or the ion level
alarm indicator frequently lights, a probable cause is that the electrode probe has reached the end of
its service life.
Electrode replacement units for SJ-M021 (OP-51607) and for SJ-M021G (OP-75351) are available as
options.
●
How to remove and install the electrode probe
The electrode probe can be removed by holding the tip of
the electrode probe and turning counterclockwise, and
installed by turning clockwise.
•
Before removing the Electrode Unit, turn the SJ-M Series OFF.
•
Do not directly touch the electrode probe with your hands. Doing so may
cause personal injury. Pay attention to this when performing maintenance
on the electrode probe.
CAUTION
When replacing the electrode, install the electrode holding the thicker resin
section of the Electrode Replacement Kit.
Important
Important
5-1
Timing Charts
This section provides timing charts for SJ-M Series.
■ Ion generation control timing chart
Indicator states when static elimination is OFF
Normal static elimination OFF
The center LED of the ion monitor blinks (red).
■ Input response timing chart
Normally ON Normally OFF Normally ON Forced OFF Normally ON Normally OFF Normally ON
Static elimination
stop input (terminal)
ON
OFF
Static elimination
stop input (controller)
ON
OFF
Ion emission state
Unit indicator
Emitting
No emissions
Alarm output
ON
OFF
Forced OFF
Forced OFF
Normally ON
Normally OFF
Max. 15 ms
Max. 1 s
Static elimination
stop input (unit)
ON
OFF
High voltage output
Emitting
No emissions
Normal static elimination OFF
The three center LEDs of the ion monitor
blink (red).
5-1
Timing Charts
■ Ion level alarm output timing chart
■ Condition alarm output timing chart
■ Alarm output timing chart
Power
ON
OFF
Static elimination
stop input (terminal)
ON
OFF
Static elimination
stop input (controller)
ON
OFF
Alarm indicator
Blinking
OFF
Alarm output (N.C.)
ON
OFF
Ion emission
Emitting
No emissions
Ion level indicator
Max. 10s
Blinking
OFF
Ion level alarm
output (N.O.)
ON
OFF
When the ion level alarm is output,
removing the cause of the alarm can
restore the normal state. One way of
restoring the normal state is to
perform maintenance on the electrode
probe.
For details on electrode probe
maintenance, see "Performing
Maintenance on the Electrode probe"
(
page 12).
Power
ON
OFF
Alarm indicator
Blinking
OFF
Alarm output (N.C.)
ON
OFF
Ion emission
Emitting
No emissions
Condition indicator
Blinking
OFF
Condition alarm
output (N.O.)
ON
OFF
Max. 10s
Static elimination
stop input (terminal)
ON
OFF
Static elimination
stop input (controller)
ON
OFF
When the condition alarm is output,
removing the cause of the alarm can
restore the normal state. One way of
restoring the normal state is to
improve the installation environment.
Power
ON
OFF
Static elimination
stop input
ON
OFF
Alarm indicator
Blinking
OFF
Alarm output (N.C.)
ON
OFF
Ion emission
Emitting
No emissions
Max. 10 s
When the alarm is output, the normal
state can be restored by performing
one of the two available restore
methods depending on the cause of
alarm output.
For details on how to restore the
normal state, see “During an alarm
(levels 1, 2)” (
page 15).