Temperature Sensing And Control; Controls And Indicators; Power Switch - Beckman Coulter Allegra 21 Series Instruction Manual

TEMPERATURE SENSING
AND CONTROL
(refrigerated models only)

CONTROLS AND INDICATORS

POWER SWITCH

With the power on, the temperature control system is activated when the
door is closed. The run temperature can be set between –20 and +40°C in
refrigerated models. If no set temperature is entered, the centrifuge auto-
matically selects the last entered temperature. (For the first run of a new
centrifuge, the instrument selects 20°C as its operating temperature.) A
thermistor in the rotor chamber continuously monitors chamber tempera-
ture. The micro-processor calculates the required chamber temperature to
maintain the selected rotor temperature.
➠
NOTE
In the unlikely event of a complete cooling system
failure, the drive will switch off if the chamber
temperature reaches 65°C. Restarting the centrifuge
will not be possible until the chamber is cooled.
The power switch is located on the centrifuge back panel (see Figure 1-3).
This two-position rocker switch (I, on; O, off) controls electrical power to
the centrifuge.
➠
NOTE
The power must be turned on before the chamber
door can be opened.
Description
1-5