Warning system, pressure

The main goal during the pneumatic test (loading and pressure holds) is to have a pre-warning system against any catastrophic failure during the pneumatic loading (gas pressure test).(4)... 

A filtered air supply should maintain a positive pressure relative to surrounding areas under all operational conditions and flush the area effectively. Final filtration should be at or as close as possible to the point of input to the area. A warning system should be included to indicate failure in the air supply and an indicator... 

Warning systems must be installed to indicate failure in the filtered air supply to the laboratory. Recording instruments should monitor the pressure difference between areas where this difference is of importance. 

A warning system should be induded to indicate failure in the air supply. An indicator of pressure difference should... 

Warning systems alert personnel when air pressure or air flow falls below established limits. Pressure differentials between areas are monitored and recorded where this difference is of importance. 

Existing early warning systems for groundwater hazard are mainly based on monitor of water source. Monitor parameters included water level, hydraulic pressure, and water temperature and water quality. Monitor parameters of water quality mainly include degree of mineralization, and diagnostic ions, such as Na+ and CL. 

Nine minutes after take-off, the crew heard a strange noise coming from the lower-middle part of the aircraft. This was immediately followed by a hydraulic low level warning, a hydraulic reservoir air low pressure warning, a complete loss of hydraulic system pressure, abnormal flap position indications, and a complete loss of air brake pressure. 

Sensation. The skin holds nerve endings that react to temperature, touch, texture, vibration, pressure, and tissue injury. The skin provides an early warning system to tell the brain to withdraw from noxious/harmful stimuli before serious tissue damage is done. 

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