Specifications

OPERATION MANUAL
“customer” – LSG60 Freeze Drier – “contract ref”
4.
FUNCTIONS
4.1 Power up
Power up is achieved via the control power switch located below the operator interface (see
Figure 3)
A power indicator illuminates to confirm that control system is on. (see Figure 3)
The Visual Supervisor, after a short self-diagnostic routine, starts up automatically in one of
two different ways:
Hot start, when control power is returned within 1 hour (factory default) the system uses
data about the current program that the Visual Supervisor automatically saves in case of
power failure. Using this information, which is preserved through any power loss, the Visual
Supervisor is able to automatically restart the program from the point it was.
Cold start, the freeze dryer reverts to its default ‘Closed Down’ status as follows:
• Compressors off
• Circulation pump off
• Vacuum pump off
• Valves closed
• Freeze-drying cycle not running
• Shelf temperature setpoint set to -20
o
C
Note: The stoppering facility cannot be operated however until the ‘RESET’ button is
pressed. (See figure 3)
System status display reads ‘Closed Down’ (see figure 7)
Power down is achieved via the control power switch located below the operator interface
(see Figure 3)
The power indicator extinguishes to confirm that control system is off.
System status: Visual supervisor, cooling compressors, fluid pump and vacuum pump off,
valves closed. Alarm contact open.
4.2 System Access Control
The Visual Supervisor is set to use individual user accounts. Accounts are configured by the
user and allocated to one of the standard access levels as follows:
1. Locked- Default level on power up. Read only with limited navigational ability.
Section 3 Issue: 1 Page 17 of 42