The peak CO concentration feature is helpful in identifying if there have been any dangerous CO readings since a peak CO concentration reset.
After the self-test is completed, the device will display the peak data. The LCD backlight will turn on and display the maximum value recorded
since the last peak data reset. The "Peak" indicator will appear on the left side of the LCD. The peak data will be shown for 5 seconds. If no
further action is taken within those 5 seconds, the device will automatically return to standby mode.
In the example, 300 ppm was the maximum CO concentration recorded since the unit was last reset.
