Martin-christ Epsilon 2-6D LSCplus Manuel d'utilisateur télécharger pdf (Page 108)

Freeze-dryer EPSILON 2-6 LSCplus

11 Appendix

108

Version 10/2012, Rev. 1.6 of 16/12/2014 • sb

Translation of the original operating manual

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11 Appendix

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11.1 Mathematical relations

The automatic processes in the “Programmer module” menu (see chapter

6.5.3 - "Freeze-drying with the PGMplus programmer module") are based

on the following considerations:

Fig. 82: Graphical representation of the course of the control set value

Calculation of the control set value and of the gradient for the

temperature:

C/min][

secsec







tioncurrentoftimetion

tionpreviousofvaluesettioncurrentofvalueset

gradient

C][sec  gradient time sectionelapsedtionpreviousofvaluesetvaluesetcontrol

Example:

Section

Set values

Section time [h:min] Temperature [°C]

Preceding ... 30

Current 1:00 60

C/min 0.5

min60

3060











CCC

gradient

After an elapsed section time of 30 minutes, for example, the control set

value for the temperature is:

C C/.CvaluesetControl





45min50min3030

min)30(

Calculation of the control set value for the vacuum:

][ 10

sec

.)sec.(10.sec(10

.)sec.(10

mbarvaluesetcontrol

timetionelapsed

sectioncurrentoftimesection

tprevvaluesetLOGtcurrentvaluesetLOG

tprevvaluesetLOG 











 





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T/°C

t/h

1000

100

0.1

0.01

0.001

0.0001

+40

+30

+20

+10

-10

-20

-30

Pressure/mbar

Set value of the previous section

Course of the shelf temperature

control set value

Set value of the

current section

section

Current

section

Following

section

1 2 ... 103 104 105 106 107 108 109 110 111 112 113 ... 134 135

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