STP-301/451 Series Instruction Manual
9-1
Operation
9 Adjustment Method
9.1 Tuning
For the STP pump, tuning is required to align the position of levitation in the axial direction
with the center of the rotor's movable range.
The tuning can be performed simply by pressing the "RESET" switch.
The tuning is completed before delivery, so it is not required before use. However, re-tuning
is required in the following cases in which the position of levitation may deviate from the
center of the rotor's movable range:
◇ When changing the length of the STP connection cable (not when changing the
length of the power cable)
◇ When using the STP pump and STP control unit having different serial numbers
9.1.1 Tuning Method
1) Connect each cable.
2) Switch "ON" the breaker on the rear panel.
3) After the STP pump completes the self test and enter the levitation state, press the
"RESET" switch on the front panel for approx. 3 seconds. The tuning starts with
"TUNING!" displayed in the LCD.
4) When the LCD displays "TUNING!", release the "RESET" switch.
5) Approx. one minute later the LCD displays "TUNING COMPLETE" and returns to the
message displayed in 3). This completes the tuning.
◇ The tuning can be performed only when the STP pump is in the LEVITATION state.
(It cannot be performed when the STP pump is in the ACCELERATION, NORMAL
OPERATION, or BRAKE state.) Also, the tuning can be performed when any
message of "LEVITATION", "RATING: ***00rpm", or "PUMP TEMP: **°C" is
displayed.
◇ When performing the tuning during remote operation, also use the "RESET" switch
on the front panel. (The remote signal cannot be used for tuning.)
◇ Once the tuning is completed, re-tuning is not required unless the configuration (the
STP pump serial number, the STP control unit serial number, and the STP
connection cable length) is changed.
◇ Although the STP pump sounds during tuning, this is not an indication of
abnormality.
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