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Appendix
13.3
EX-TEC OD 4/GM 4 operating instructions in brief
switch on
(press for about 3 seconds)
switch off
(press for about 3 seconds)
clear AL1 alarm
(press briefly)
witch between operating modes/gases:
- set zero point
- warning
- measurement
- save or start measurement (OD 4 only)
(any key)
switch on LCD illumination and operating-
hours dispplay
(...these switch off automatically after about
10 seconds)