Wesemann SYSTEM DELTA 30 User Manual page 37

3.4.8 Detailed description of the functions
OLED- Display
 01
Display of volumetric flow, as well as operating and status reports
By means of the graphic OLED Display (64x64 Pixel) in the function display, all important operating and status
information on the fume cupboard can be read off directly. Volumetric flow, inflow rate, error and operating
information are immediately displayed in plain text and status reports are represented by graphic icons.
LED OK (green)

02
Volumetric flow okay
This green glowing LED indicates the normal state, i.e. the laboratory fume cabinet is operated with a sufficient
exhaust air volumetric flow and is consequently in safe operation.
LED LOW (red)

03
Volumetric flow too low
This red glowing LED indicates a malfunction, i.e. the fume cupboard is being operated with an insufficient
exhaust air volumetric flow and is, therefore not protected against the release of harmful substances. Using the
RESET button, the acoustic alarm (malfunction due to insufficient exhaust air volumetric flow) can be
Acknowledged. The optical alarm signal cannot be acknowledged and will only be reset when a sufficient
exhaust air volumetric flow is available.
STATUS DISPLAY - MAINS POWER FAILURE:
In the case of a power failure, the red LED flashes once every 2 secs. Parallel to this, an acoustic alarm
sounds. A mains power failure is displayed even when the unit is switched off, but then without an acoustic
alarm. This function is available if the control is equipped with an emergency power supply accumulator.
LED CLOSE SASH (yellow)

04
Warning: Close sash if opening > 50 cm
This yellow flashing LED signals an optical warning if the sash is opened > 50 cm. This LED indicates to the user
that the laboratory fume cupboard may be in unsafe operation. The sash must be closed.
RESET button

05
Reset acoustic alarm
With the RESET/QUIT button, the acoustic alarm (malfunction due to insufficient exhaust air volumetric flow) can
be acknowledged. The optical alarm signal cannot be acknowledged and will only be reset when a sufficient
exhaust air volumetric flow is available.
User Manual | Laboratory Fume Cupboard | Product Description 37