Contents Of Warning Function; First Damage Limit; Second Damage Limit; Pump Run Time Over - Edwards STP Series Instruction Manual

7.3

Contents of WARNING function

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7 7.3.1

First Damage limit

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Impact of the STP pump rotor onto the touch down bearing, such as an unexpected in-rush of air
from outside or power failure, can damage the touch down bearing. The STP pump monitors these
impacts and adds damage points when "Disturbance" or "Power Failure" occurs. 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. Serial communication, the STP-Link (optional accessory) or the display unit iDT-002
(optional accessory) can confirm the accumulated damage points and change the settings.
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 set 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 the
"Second Damage Limit" is detected.
If it needs to operate the STP pump after the "Second Damage Limit" is detected, disable the
"Second Damage Limit". The "WARNING" is still detected, but the STP pump can rotate.
The setting can be changed via serial communication, the STP-Link (optional accessory) or the
display unit iDT-002 (optional accessory). The settings can be changed using the serial
communication, the STP-Link (optional accessory), or the display unit iDT-002 (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 set value, the "Pump Run Time Over" is detected. When deposition accumulates
inside the STP pump, this function can be used to consider the time of the overhaul.
The setting value is user-definable.
It can confirm the total running hours of the pump and change the setting value using the serial
communication, the STP-Link (optional accessory), or the display unit iDT-002 (optional accessory).
MT-91E-001-0
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STP-iXA4507 series Turbomolecular Pump