Honeywell BW Flex Series User Manual page 19

6. After the Zero calibration is completed, place the cap over the detector, and then press down
on both tabs to snap it into place.
7. Attach the hose.
8. use any of the following three ways to select the gas cylinder, and then click START.
Scanning: Scan the bar code from the cylinder
Selecting: Choose the Last Time User cylinder information
Typing: Manual input of the gas concentration
BW Flex Series 18 User Manual