Controls, Indicators, and Displays
SORVALL
®
Centrifuges
3-4
Main POWER and KEYPAD LOCK
The Main POWER and KEYPAD LOCK panel is located away from
the control console, in the top-right corner of the front cabinet panel.
The POWER I/O (ON/OFF) switch is a 50-amp circuit breaker that
turns the centrifuge ON and OFF by connecting or disconnecting the
main supply power from all system circuitry.
The KEYPAD LOCK can be used to limit control panel function. It
uses a 3-position keyswitch with a key that is removable in any of the
3 positions. Functionality is as follows:
• The middle position, FULL FUNCTION, allows use of all keys
and features, without restriction;
• The upper position, RUN SINGLE PROGRAM, minimizes
functionality so that set parameters cannot be changed (START,
STOP, and CLEAR are the only active keys);
• The lower position, RUN ANY PROGRAM, makes it so that
users may only perform runs using run parameters recalled from
program memory (only RECALL, the numeric keypad including
ENTER and CLEAR, START and STOP are active).
Use of the KEYPAD LOCK may offer a considerable advantage,
improving process control by reducing the possibility for operator
error, as well as restricting unauthorized run parameter or program
memory changes.
O
I
POWERKEYPAD LOCK
FULL FUNCTION
RUN SINGLE PROGRAM
RUN ANY PROGRAM
ON
I
O
OFF
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