4 - Description of Function
Function
Tecan Vacuum Separator (Te-VacS™) Operating Manual, 391236, en, V4.0
23 / 54
4.8 Function
Illustration 6:
Operation principle of the Te-VacS
A
Vacuum unit
B
Control unit
C
Vacuum pump
D
MPO VacS board
E
Pressure sensor
F
Vacuum control valve
G
Extraction valve
H
Ventilation valve
I
Base plate vacuum block
J
Liquid level sensor
K
Waste bottle
The vacuum pump (C) generates a vacuum in the waste bottle (K). Via the
extraction valves (G) the vacuum can be applied to the base plate vacuum block
(I). This results in drainage of the liquid from the SPE cartridge block into the waste
bottle. The vacuum can be released via ventilation valves (H).
To compensate for variations of ambient pressure in different altitudes and weather
conditions, the Te-VacS pressure control system is based on pressure difference
measurement.
The following illustration shows an example of pressure difference. The current
ambient pressure is supposed to be 1000 mbar. According to the script in the
software, in this example, the system must reach a negative pressure difference
(vacuum) of 700 mbar. Thus, the final absolute pressure results in 300 mbar.
