Example: air traffic controller
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MSA Altair 4 Multigas Detector Operating Manual
irp-cdn.multiscreensite.comthree function buttons (see Figure 2-1). 2.2.1 Button Definitions Button Description [ ] The [ ] button is used to turn instrument ON or OFF and to confirm user action selections. When the [[ ] button and the ] button are pressed simultaneously at instrument start-up, the Options Setup Mode displays.