Specifications

DESCRIPTION AND OPERATION Document No. DER01120

Effective Date 25 May 07 Page 9 of 9

Vibration

Tripping the vibration switch due to excessive vibration of the centrifuge will also cause a

shutdown, as the switch interrupts power flow to centrifuge run relay CR1. After removing the

cause of unusual vibration, pressing the external button on the switch housing returns the switch

contacts to the magnetically latched condition to restore power. The centrifuge is re-started by

pressing the CENTRIFUGE ON button.

Motor Over-Temperature

The motor over-temperature switch interrupts power to run relay CR1 if the drive motor becomes

excessively heated. After allowing the motor to cool and removing the cause of heating, the

centrifuge is re-started by pressing the CENTRIFUGE ON button.

The content of this document is subject to change at any time. Information provided does not cover all details or variations possible

with DERRICK equipment; nor does it cover every contingency that may be met in conjunction with installation, operation,

maintenance, or troubleshooting of the equipment. Should additional information be required, or should situations arise that are not

covered by this manual, bring the matter to the attention of your local DERRICK representative or the Service Department at

DERRICK Corporation in Buffalo, New York.