KEYENCE SJ-HA Series - Manual (Page 10)

10
Static Elimination Function List
■ Operating area and operation time
This section shows typical examples of the time necessary for static elimination, and the relationship of the installation distance between the target and the static elimination bar.
Operating area and time (33 Hz)
Operating area and time (10 Hz) Operating area and time (1 Hz) Operating area and time (at air MAX )
■
Relationship between air pressure and air flow with different bar lengths
The relationship between air pressure and air flow varies depending on the length of the static elimi-
nation bar.
Refer to the typical example on the right to select the appropriate air supply device (compressor) that
will supply sufficient air flow.
■
Relationship between operating time and operating distance with different air
pressure
The relationship between operating time and operating distance varies depending on the air pres-
sure.
Refer to the typical example on the right to select the appropriate air pressure.
■ Relationships between installation speed and static elimination speed due to frequency settings
This displays the relationship between frequency settings and static elimination speed and installation distance
Measurement conditions:
The time required to eliminate the static charge of
the target from
±1000 V to ±100 V is measured.
The 150 ×150mm plate monitor (20 pF) is used.
SJ-H108A is used.
No downflow
Measurement conditions:
The time required to eliminate the static charge of
the target from
±1000 V to ±100 V is measured.
The 150 ×150 mm plate monitor (20 pF) is used.
SJ-H108A is used.
Under the downward air flow of 0.3 m/sec.
50 100 150
50
100
150mm
50 100 150mm
0.4sec
1.2sec
1.0sec
0.8sec
0.6sec
150 300 450
300
600
900mm
150 300 450mm
5sec
15sec
10sec
30sec
Measurement conditions:
The time required to eliminate the static charge of
the target
±1000 V to ±100 V is measured.
The 150 ×150 mm plate monitor (20 pF) is used.
SJ-H108A is used.
Under the downward air flow of 0.3 m/sec.
150 300 450
300
600
1500mm
600 150 300 450 600mm
900
1200
10sec
20sec
4sec
30sec
6sec
Measurement conditions:
The time required to eliminate the static charge of
the target from
±1000 V to ±100 V is measured.
The 150 ×150mm plate monitor (20 pF) is used.
SJ-H108A is used.
No downflow
150 300 450
300
600
1500mm
600 150 300 450 600mm
900
1200
1sec
2sec
0.5sec
3sec
0
1000
1200
0.0 0.1 0.2 0.3 0.4 0.5
200
400
600
800
Supplied flow[N /min]
Air pressure[MPa]
SJ-H036A
SJ-H060A
SJ-H084A
SJ-H108A
SJ-H132A
SJ-H156A
SJ-H180A
SJ-H204A
SJ-H228A
SJ-H252A
SJ-H300A
Measurement conditions:
The time required to eliminate the static charge of
the target from
±1000 V to ±100 V is measured.
The 150 x 150 mm plate monitor (20 pF) is used.
SJ-H108A is used.
No downflow
0
2
4
6
8
10
0 50 100 150 200 250 300
Static elimination time[sec]
Operating distance[mm]
0MPa
0.002MPa
0.01MPa
0.2MPa
0.5MPa
0
5
10
15
20
25
30
0 200 400 600 800 1000 1200 1400 1600
Operating distance[mm]
Static elimination time[sec]
10Hz
5Hz
3Hz
1Hz
Measurement conditions:
The time required to eliminate the static charge of
the target from
±1000 V to ±100 V is measured. The
150 x 150mm plate monitor (20 pF) is used.
SJ-H108A is used.
No downflow
Measurement conditions:
The time required to eliminate the static charge of
the target from
±1000 V to ±100 V is measured. The
150 x 150mm plate monitor (20 pF) is used.
SJ-H108A is used.
Under the downward air flow of 0.3 m/sec.
0
5
10
15
20
25
0 50 100 150 200 250 300
Static elimination time[sec]
Operating distance[mm]
33Hz
22Hz