Martin Christ RVC 2-33 CDplus - Manual (Page 41)

RVC 2-33 CD &
Using the RVC
Version 01/2009, Rev. 1.21 of 25/11/2013 - sb 41
Translation of the original operating manual
6.3.5.2 Program Administration
Fig. 6.18: Program administration menu
Contrary to a manual evaporation process, a program is used for a
timer-controlled, pre-programmed process (evaporation program).
An evaporation program is divided into several sections. Every
section of the program has set values for the time, temperature,
vacuum, safety pressure, and speed.
You can create up to 16 individual evaporation programs. Up to 80
sections can be assigned to each of these programs. A program
always consists of at least 3 sections.
The higher the speed is, the more thermal energy will be produced
because of the waste heat of the drive unit and also because of the
eddy current losses of the magnetic coupling. If thermosensitive
products are processed, the speed can be set to a correspondingly
low level in order to prevent a too high energy input and, thereby,
the excessive heating of the product.
If the temperature increases too quickly during an evaporation
process, the system is being supplied with too much energy. As a
result, the vacuum may collapse, which in turn will interrupt the
evaporation process and may destroy the product in the unit. In
order to ensure a controlled process run, there is no sudden
increase or decrease of the setpoint between the sections. Instead,
the setpoint changes steadily. The defined section setpoint is
reached at the end of the respective section.
Calculation of the gradient see 11.1 "Mathematical Relations".
Fig. 6.24: Graphical representation of the course of the control setpoint