Edwards STP-iS2207 Series - 7.3 Contents of WARNING function

STP-iS2207 Series Turbomolecular Pump
MT-89E-001-C
Page 134
7
SAFETY FUNCTIONS
7.3 Contents of WARNING function
7.3.1 First Damage limit
Impact of the STP pump rotor onto the touch-down bearing, such as by an unexpected in-rush of air
from outside or in the event of power failure, can damage the touch-down bearings. The STP pump
monitors these impacts and assigns damage points to the event of "Disturbance" or "Power Failure".
When the accumulated damage point attains certain points, the "First Damage Limit" is detected.
"First Damage Limit" warning can be released by setting the warning function to disable after it is
detected. The accumulated damage points can be confirmed and the setting can be changed via
serial communication, the STP-Link (optional accessory) or the display unit iDT-001 (optional
accessory).
7.3.2 Second Damage Limit
"Second Damage Limit" is detected when continuing to operate the STP pump after "First Damage
Limit" is detected and the accumulation of the damage point attains the setting value by further
"Disturbance" and "Power Failure".
"Second Damage Limit" warning detects "START NOT ALLOWED" failure at the same time.
Overhaul the STP pump because the STP pump cannot perform the rotational operation when
"Second Damage Limit" is displayed.
When operating the STP pump is needed after "Second Damage Limit" is displayed, disable the
"Second Damage Limit". The rotating operation can be performed even though the "WARNING" is
detected.
The setting can be changed via serial communication, the STP-Link (optional accessory) or the
display unit iDT-001 (optional accessory).
7.3.3 Pump run time over
There is a run-time counter that tracks the total running hours of the pump. When the run-time counter
attains the setting value, the "Pump Run Time Over" is detected. When deposit accumulates inside
the STP pump, this function can be used to consider the time of the overhaul.
The setting value is user-definable.
Confirmation of the total running hours of the pump and change of the setting value can be performed
via serial communication, the STP-Link (optional accessory) or the display unit iDT-001 (optional
accessory).