Thermo Scientific APEX 500 Rx User Manual page 16

2) Set the air pressure to 70 psi (4.82 BAR) using the black regulator valve above the
air-pressure gauge, but do not exceed 70 psi (4.82 BAR).
3) Congratulations! You have now finished installing your compressed-air model APEX
Rx. Now go to page 20 of the manual, which tells you how to set passwords for APEX
users.
Page 16 Thermo Scientific—APEX 500 Rx User's Guide