1.Press and hold ‘Reset’ button
2.Instrument prompts user to “Zero Cal?”
3.Press ‘On/Off’ to accept & initiate zero function
Or press ‘Reset’ to cancel function![](data/images/img5.png)
4.Unit will automatically zero sensors
‘Zero pass’![](data/images/img5.png)
5.Instrument prompts user to “Span Cal?”
6.Attach cal. cap & flow cal. gas to instrument
7.Press ‘On/Off’ to accept & initiate span
Or press ‘Reset’ to cancel function![](data/images/img5.png)
8.Unit will automatically span sensors