CHAPTER
4
BASIC OPERATION
Turning the instrument on
1. With the instrument turned off, press and hold [MODE].
2. When the display turns on, release the [MODE] key.
The instrument is now operating and performs self-tests. Once the self-tests are complete,
the display shows a graph or numerical gas reading. This indicates that the instrument is
fully functional and ready to use.
Turning the instrument off
1. Press and hold the [MODE] key for 3 seconds. A 5-second countdown to shutoff begins.
2. Once the countdown stops, the instrument is off. Release the [MODE] key.
3. When you see “Unit off...” release your finger from the [MODE] key. The instrument is now
off.
Note: You must hold your finger on the key for the entire shutoff process. If you remove your
finger from the key during the countdown, the shutoff operation is canceled and the instrument
continues normal operation.
Handheld PID Monitors 21 User Manual
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