Instruction Manual
Negative Pressure Unit green dec
Version 1
Page 33
7.2.8. Filter sensor
A filter sensor monitors the particle concentration in the exhaust air.
The state of the filter sensor is shown on the display.
An optical and acoustic alarm is triggered, if a value of 100 particles per liter is permanently
exceeded in the exhaust air.
Check the HEPA filter for correct installation or damage. The warning must be
acknowledged by tapping the "Ok" button.
Wait a few minutes for the filter sensor to regain sufficient data. During this time, the filter
sensor lights alternately yellow and red.
If the particle concentration decreases, the display of the filter sensor changes to green.
Display filter
sensor
message filter sensor with few
particles over a longer period
message filter sensor for many
particles within a short period