Freeze-dryer Alpha 1-4 LDplus
Freeze-dryer Alpha 2-4 LDplus
6 Operation
Version 11/2006, Rev. 2.2 of 17/10/2016
• sb
41 / 102
Translation of the original operating manual
Display (5)
The main window of the display is divided into the value windows, an area
indicating the current function of the function keys, and a status line. The
main window displays all of the relevant process data, such as set and
actual values, menus, and process information (see the illustration).
6
Value window
7
Current function of the
function keys
8
Status line
Fig. 23: Layout of the LDplus control system display
Value windows (6)
The value windows are displayed after the initialisation of the control
system. There are two value windows with an identical layout. The
indication of the measurement value channels is controlled by way of the
"up" and "down" keys (see above).
9
Measurement value
channel
10 Set value (only in the
run mode)
11 Unit of the
measurement value
12 Actual value
Fig. 24: Value windows
The available measurement values can be displayed in the left as well as in
the right value window so that a combination of the following values can be
selected:
• Total time (indicates the total runtime of the process)
• Section time (indicates the runtime of an individual phase, e.g. freezing,
warm-up of the vacuum pump, or main drying)
• Ice condenser temperature
• Vacuum in mbar (indicates the vacuum in the drying chamber; only
possible if a vacuum sensor is installed)
• Vacuum converted into °C (indicates the vacuum inside the drying
chamber, converted based on the vapour pressure curve for ice and
water, see chapter 2.2.1 - "General information on freeze-drying"; only
possible if a vacuum sensor is installed)
Current function of the function keys (7)
See function keys (1+2)
