Heidolph LABOROTA 20 compact and safety - Manual (Page 88)

88
E

Depress Select and Start Stop keys near Display I together and hold for 5 seconds, turn master
switch ON, release keys
 „CAL“ is shown in the Display Speed, „VAC“ in the Display Time

750 is shown in Display I and 1 is shown in Display II (1st step).

Now, set the pressure measured with the separate vacuum
gauge in Display I, by pressing the Set increase key or Set
decrease key

Confirm with Start Stop key located next to Display I

Display I to show 50 and display II 2 (2 nd step).

At this point, the LABOROTA 20 control automatically
opens the vacuum valve and evacuates until reaching
vacuum limit (the value on the separate vacuum gauge
won’t change anymore)

In Display I, set the pressure measured with the separate
vacuum gauge in Display I, by pressing the Set increase
key or Set decrease key

Confirm with Start Stop key located next to Display I. As
confirmation for the accepted calibration values, „0“
appears in Display I and Display II

Turn master switch (Power) OFF and ON

Calibration is complete
750
1
Display I Select key
Taste
Start /Stop
Display II
Display Speed
Display Time
CAL
VAC
increase
decrease