Gas Selection; Maintenance And Service - WatchGas NEO Quick Start Manual

Gas Selection

Span calibration is usually done with isobutylene.
To correct the response to be accurate for another
gas:
Config Mode › Measure › Gas Library
Scroll the gas list and select the desired gas, then
press Left to save and exit.

Maintenance and Service

Replace the inlet water trap filter on a regular basis,
especially when used in dusty environments.
For battery, lamp, or sensor replacement and other
maintenance refer to the User Manual or contact the
service department of WatchGas.