
7
User Interface
3.2 User Interface
3.2.1 Operating Knob
The Operating Knob is a combined ON/OFF switch and vacuum
selector, located at the bottom of the User Interface.
The LSU is switched ON by turning the Operating
Knob to the required setting. Each setting
indicates the maximum achievable vacuum level
for the selected position (80, 120, 200, 350,
500+ mmHg). The free air flow value changes
along with the increasing vacuum settings
(see section 9.4 for details). The LSU is switched
OFF by resetting the Operating Knob to “0”.
Even if the Operating Knob is in “0” position, voltage is present on some
of the internal circuitry, when the LSU is connected to mains. To fully
remove power, pull out the Power Cord.
TEST-Button
Power ON Indicator
Vacuum Indicator
Battery Status
Indicator
Operating Knob
External Power
Indicator
Failure Mode
Indicator
LSU DfU US 6791 rev H.indd 7
30.09.2016 14:39:49