After testing the reference cell system to 200 psia and to protect the cell from rupturing during normal operation, the relief valves have been set to 175 psia.
All personnel shall wear hearing protection when accessing the platform area while the cell is under high pressure and no windows are on the target enclosure.
Special care must be taken when accessing the region inside the target enclosure. Full face shielding, long sleeve shirt and long pants should be worn under these conditions. Before working in the vicinity of any of the reference cell components, personnel shall check the pressure in the manifold from the baratron readout in the remote control area.