Beckman Coulter Avanti JXN-26, User Manual

Page: 36 / 210

PN B38322AA 1-4
Description
Overtemp System
Overtemp System
An overtemp (over temperature) system provides flexibility, sample protection, and safety for the
user.
• The maximum allowable deviation above the Set Temperature is configured by the user. The
default setting is 4°C.
• For each run the user sets the desired run temperature.
•
If the system is configured to shutdown when the set temperature is exceeded, the system shuts
down using maximum brake when the actual temperature exceeds the set temperature by the
overtemp setting.
• To protect the instrument hardware, the system shuts down when the over temperature is
reached. The shutdown cannot be disabled by the user. The system shuts down using maximum
brake when its over temperature shutdown point is exceeded. For a listing of the specified
temperature for each instrument, see
Specifications .
Safety Features
Avanti JXN series centrifuges have been designed and tested to operate safely indoors at altitudes
up to 2000 m (6562 ft). Safety features include the following:
•
An electromechanical door lock system prevents operator contact with spinning rotors and
prevents run initiation unless the door is closed and locked. The door locks when
START
is
pressed, or when the POWER switch is turned off. The exception to this is
ZONAL
mode, in which
open-door operation up to 3000 RPM is allowed.
•
A steel casing surrounds the rotor chamber to provide operator protection in the unlikely event
of a rotor mishap.
•
Dynamic Rotor Inertia Check (DRIC):
As the rotor accelerates, rotor inertia is measured and the
rotor energy is calculated for the speed set by the user. If the calculated rotor energy is
determined to be excessive, the instrument will stop the run and issue a diagnostic message.
•
An imbalance detector monitors the system during operation, causing automatic shutdown if
rotor loads are severely out of balance.