Led And Display Test - Dräger REGARD 3900 Series Instructions For Use Manual

Operation
● Press Hold / II / ▲ for less than 1 second to switch display scrolling on/off (if
using more than 4 channels).
● Press Hold / II / ▲ for longer than 1 second to toggle between the gas type and
the measuring range.
Only REGARD® 3920
Using the buttons ▲ / ▼ / OK on the REGARD® 3920, you can also navigate to the
settings within the integrated configuration menus and select them.
6.7

LED and display test

By pressing and holding two control buttons at the same time, the LEDs, the display
and the internal acoustic alarm sounder of the control unit can be tested. While the
buttons are pressed, all the LEDs light up (the power AC LED only lights up when
the corresponding connector), all segments of the display field are filled and the
acoustic alarm sounder emits an audible tone.
– REGARD® 3900: Press Acknowledge and Hold
– REGARD® 3910: Press OK and II
– REGARD® 3920: Press OK and ▲
This feature can be used if needed for reliability testing of the visual and acoustic
output of the control unit.
®
REGARD 3900