7. Be sure to switch off the AEROCET 531 power when you are finished sampling
to conserve battery power.
If the AEROCET 531 failed the test run, first check to see if the factory defaults are still
set properly, program them in if they are not (Section 5), then try another test sample. If
there is still a problem refer to Section 8 Troubleshooting.
Note: NEVER let moisture (e.g. rain) enter the sample inlet. Also put the AEROCET
531 in a watertight enclosure if you plan to use it outdoors.