Instruction manual

STP-200/300/400 Series Instruction Manual
5.6.2 Starting/Stopping the STP Pump
Table 5.1 describes how to start or stop the STP pump during remote operation.
Table 5.1 Starting/Stopping the STP Pump during Remote Operation
Connector Starting the Pump Stopping the Pump
Remote
Connector
(CON40)
Input 24 V DC between (3)-(15) (MOTOR
START) for 0.3 seconds or more ((3): "+"
side; (15): "-" side).
However, when inputting this START
signal simultaneously with inputting the
POWER ON signal, input this signal for
5 seconds or more.
Input 24 V DC between
(4)-(16)
(MOTOR STOP) for
0.3 seconds or more ((4): "+"
side; (16): "-" side).
The STOP signal has priority
over the START signal.
◇ Make sure the STP pump stops thoroughly by confirming that the
ROTATION meter on the front panel deflects to full-scale in the red.
◇ When the pressure inside the STP pump is 1.3×10
-5
Pa [10
-7
Torr] or
less, the stopping time is 15 minutes or more.
◇ The STP pump can be stopped faster by introducing a gas (such as
dry N
2
gas) into the STP pump. Introduce a gas so that the pressure
inside the STP pump increases to 5.3×10
2
to 6.7×10
2
Pa [4 to 5 Torr]
in 10 seconds after gas introduction.
Note that a sharp increase in the pressure may cause the STP pump
to operate abnormally.
5.6.3 Starting the STP Pump after Stopping
Perform the start operation to reaccelerate the STP pump. See Section 5.6.2,
"Starting/Stopping the STP Pump."
The STP pump can be reaccelerated even while it is stopping.
5-7