KNF N 820.3 FT.40.18, Operating Instructions Manual

Page: 14 / 36

Design and Function Laboratory vacuum pumps N 8__.3 FT.40.18
14 Translation of original Operating Instructions, English, KNF 121350-121429 11/18
The control for the drying system is effected via three variables:

The time between switching on the drying system and the first
ventilation of the pump heads (t
1
)

The duration of the ventilation of the pump heads (t
2
)

The interval between pump head ventilation operations (t
3
).
For t
1
to t
3
standard values are set in the factory.

t
1
= 210 sec

t
2
= 2.0 sec

t
3
= 40 sec
In addition to this, the drying process can also be individually
adapted to a process sequence. To do this, the values for t
1
, t
2
,
and t
3
can be altered (see chapter 7.4). The pump must be discon-
nected from the electricity mains beforehand.