Fisher Bioblock Scientific 101041, Руководство по эксплуатации

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Operating Manual Freeze Dryer ALPHA 1-4 LD-2 / 2-4 LD-2 , Version 0203, Page 25
3.1 Mains Switch
The unit is switched on by means of the mains switch on the upper right side of the
unit.
The LED-display lights up and the refrigerator is in operation.
3.2 "
°
C mbar" Button
On the freeze dryer
ALPHA 1-4 LD-2 / ALPHA 2-4 LD-2 the vacuum in the drying
chamber or alternatively the ice condenser temperature can be displayed. The change-
over is carried out by pressing the
"
°
C " or
“
mbar
”
button.
The vacuum measuring sensor TPR 265 (accessory) is necessary for measuring the
vacuum.
The upper pressure range - not important for freeze drying - is displayed in rough
steps only (
"A" corresponds to atmosphere).
If the unit is not equipped with a vacuum measuring sensor the display shows "----" at
switch position "mbar".
3.3
"
≙
" Button
With this button the ice condenser temperature can be converted according to the
vapour pressure curve above ice into the vacuum in the drying chamber or the
measured vacuum can be converted into the temperature of the samples.
The possibility to convert the vapour pressure curve serves as orientation and helps to
show the relation between pressure and temperature during freeze drying (see chapter
4).
Button "
°
C"
LC-Display
Button "
≙
"
Button "mbar"