MSA Orion G Mode D'emploi page 68

Chapter 6, Warranty, Maintenance and Troubleshooting
10. Position the rear case 90 degrees up from the front case;
route the pump outlet tube between the pump and the
connector circuit board and connect it to the barb protruding
through the circuit board.
11. Replace and secure the back of the case with the four
mounting screws. Take care to route the tubing properly and
to correctly mate the main and connector boards.
12. Replace the battery pack and two mounting screws securing
the battery pack.
13. Completely recalibrate the Orion G Multigas and Leak
Detector.
Verification of calibration response is required; otherwise,
the instrument will not perform as required, and persons
who rely on this product for their safety could sustain serious
personal injury or death.
6-14
" WARNING
Operating Manual