PISCO VG Series, Manual, Page: 11 / 21

116
VN
VZ
VQ
VX
VJ
VK
VG
VACUUM
GENERATOR
EXTERNAL VACUUM
CONTROLLER
VACUUM
PAD
VACUUM
ACCESSORIES
■ Manual of Vacuum Sensor
■ Adjusting Method of Blow-off Air
■ Attaching / Detaching Individual Plug-in Connector
P
Air rate: Reduce Air rate: Increase
Blow-off air rate adjustment needle
Locknut
(～)Blue (～)Blue
＋ －
(Black)
0V
(Red) ＋
V
Note) ( ) is the lead color.
■DC24V ■AC100V
■Backside of connector
Latch
(Latch) 0V
(Red) ＋V
1. Pressure Adjustment
①
Turn on the power (Apply DC power to the vacuum sensor after making sure the correct wiring).
②
Fully turn the hysteresis setting trimmer (HYS) in the counter-clockwise direction in order to minimize the
hysteresis setting. (Vacuum sensor with analog output (Code: -NA) only)
Note) When vacuum level is not stable, minimized hysteresis make the output unstable.
③
Adjust the vacuum setting trimmer (S1 / S2 and SW) to meet the required value.
Note) Use a vacuum gauge or check in the actual system for setting pressure.
④
Apply the air pressure and check the operation.
(In case of Vacuum sensor with analog output (Code: -NA))
Switch output (SW): Operation indicator (Red LED) turns ON more than the set pressure.
(Vacuum sensor with 2 switch output (Code: -NW))
Switch output 1 (S1): Operation indicator (Red LED) turns ON more than the set pressure.
Switch output 2 (S2): Operation indicator (Green LED) turns ON more than the set pressure.
2. Differential response setting (Vacuum sensor with analog output (Code: -NA) only)
①
Differential response setting can be adjusted by the hysteresis setting trimmer (HYS).
②
Differential response setting range is regulated within about 0-15% of the set value. Differential response
setting becomes large when the trimmer is turned in the clockwise direction.
③
Confirmation of Hysteresis
Gradually increase and decrease the supply pressure around the set pressure value and read the value
from a vacuum gauge when operation indicator lamp turns ON/OFF. The difference in the displayed
values is taken as differential response.
④
Hysteresis adjustment is useful for the following cases:
・
Increase differential response when pressure pulsates with output repeatedly showing small on/off movements.
・
When an allowable range is to be set for the lowering of pressure.
■
Adjusting Method of Blow-off Air
●
Turn the release needle in the clockwise direction to reduce
blow-off air and counter-clockwise to increase.
※
After adjustment of the blow-off air rate, make sure to
tighten the locknut to prevent the setting from changing
with attentions to the following
①
and
②
.
①
Without turning the needle, finger-tighten the lock nut clockwise until it touches needle-guide. Then
tighten the nut by turning 20 ~ 30
°
more by using proper tool.
②
Be careful not to damage the thread by over tightening.
■
Attaching / Detaching Individual Plug-in Connector
●
Insert the connector into the socket until it stops.
■
Connector Detaching Method
●
Pull out the connector while pushing the latch to
the arrowed direction.