Heidolph ROTAVAC Vario pumping unit - Manual (Page 33)

page 33 of 61
Documents are only to be used and distributed completely and unchanged. It is strictly the users´ responsibility to check carefully
the validity of this document with respect to his product. Manual-no.: 999248 / 28/04/2011
The last process is stored in the temporary data memory as long as the controller stays switched on.
This program can be transferred to a storage space and edited.
Once the program is finished, the clock symbol starts to flash. Confirm the end of the program by press-
ing START/STOP (clock symbol will disappear).
Attention: If ”Autostart” is set to ”On”, the program will start again (time will be reset to 00:00:00)
after a power failure or after switching the controller off/on. Only if the end of the program (clock symbol
flashing) has been confirmed by pressing START/STOP, the program will not start again.
Attention: If the controller is set to ”Defaults”: ”On”, all stored programs will be deleted.
Example for use
Example: Degassing and automatic distillation with timing at a rotary evaporator:
Program step 1 should be always a definite initial state, here atmospheric pressure (ATM). To reach this
state definitely, set a tickmark at ”Vent.” and ”Step” (press selection knob).
In step 2 pumping down starts as fast as possible (”Step”) to 300 mbar and the vacuum is kept for 10
minutes (degassing of the solvent).
In step 3 ”Auto ” causes an automatic search of the boiling vacuum in the pressure interval between
300 mbar and 2 mbar and automatic adaptation to a changing boiling pressure. The following step starts
if time is over (after 60 minutes) even if the preset pressure (2 mbar) is still not reached or if a vacuum
of 2 mbar is reached even if the preset time has not passed.
Step 4 vents to atmospheric pressure as fast as possible and switches off the control after one minute.
➜
Program
No hh:mm:ss Vac Vent. Step Auto
01 00:00:00 ATM ✔ ✔
02 00:10:00 300 ✔
03 01:00:00 2 *
04 00:01:00 ATM ✔ ✔
05 00:00:00 0
06 00:00:00 0
07 00:00:00 0
08 00:00:00 0
09 00:00:00 0
10 00:00:00 0
- - - - - - - - - - - - - back - - - - - - - - - - - - - -
01:11:00
➜
* If the pressure difference between the vacuum for
degassing and the expected vacuum for distillation
is very small (distillation vacuum >75% of the de-
gassing vacuum), select the function ”Auto ” in-
stead of ”Auto ” (adapting the vacuum).
➜