1. Team SOLAR Mirrored Oyster Environment, FMEA Computer, Matlab, Simulink, WinCon Control Devices Sensors 120VAC Cord and Plug 12 VDC 120 VAC Quanser Q4 Relay Board, Safety Circuits 2 VDC 5 VDC 12 VDC 5 VDC Control Signal

2. FMEA Mirrored Environment DescriptionFailure ModeSymptomEffectProbability of Failure HazardDanger Cord / Wall plugPlug broken / bent No power output May have exposed energized metal 145 Cord frayed / weakened Cord endpoints visible despite insulation May have exposed energized metal; short circuit / fire possible 145 Input over voltage Output over voltage; possible internal circuit failure Power spike; plug connected to wrong connector 123 InputOutput transients May cause undesired output voltage waveform 112

3. FMEA Mirrored Environment DescriptionFailure ModeSymptomEffectProbability of Failure HazardDanger Relay Board, Safety Circuits, Power Supply Relays stuck on. All systems running constantly independent of program Use excess of power and solutions; kill oysters 224 Overvoltage from power supply. Relay board overheats System destroyed; Fire 145 Safety Circuit does not open. System runs when computer shuts off All solutions and instruments run constantly; kill oysters 123 Relay box gets wet. Circuitry shorts. Fire, electrocution, kill oysters 257

4. FMEA Mirrored Environment DescriptionFailure ModeSymptomEffectProbability of Failure HazardDanger Quanser BoardAll outputs go high. System runs without program Kill oysters; Large power usage; solutions are exhausted 224 Power loss.System stops. All values off, no feedback; Oysters die. 226.5 Output voltages scaled. Safety circuit fails open. System stops running. 0.511.5

5. FMEA Mirrored Environment DescriptionFailure ModeSymptomEffectProbability of Failure HazardDanger Computer, Matlab, Simulink, WinCon Computer shuts down. System stops running. No control; oysters die. 325 Program freezes. System stops running. No control; Oysters die. 224 False data imported. System runs at incorrect levels. Recorded data incorrect; oysters stressed. 112

6. FMEA Mirrored Environment DescriptionFailure Mode SymptomEffectProbability of Failure HazardDanger SensorsFalse high temperature reading. High temperature even with system cooling. Tank over cooled; oysters stressed. 112 False low temperature reading. Low temperature even with system heating. Tank over heated; oysters stressed. 112 False high salinity reading. High salinity even with system pumping fresh water. Tank salinity drops; oysters become hypotonic. 224 False low salinity reading. Low salinity even with system adding salt water. Tank salinity increases; oysters become hypertonic. 224

7. FMEA Mirrored Environment DescriptionFailure ModeSymptomEffectProbability of Failure HazardDanger Control DevicesPump breaks.No flow on affected system. System component fails, levels affected. 224 Solenoids hold open. Salinity increases. Tank salinity increases; oysters become hypertonic. 134 Heater holds on. Water heated to heaters maximum of 31 o C Tank over heated; oysters stressed. 123 Overflow holds on. Tank drains.Tank reaches minimum level; no control over system. 134