Metrohm NIRS XDS Process Analyzer – SingleFiber - Manual (Page 20)

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Sequence 4:
Safe Pressure Achieved
ENCLOSURE
POWER
DISENGAGED
SAFE
ENCLOSURE
PRESSURE
RAPID
EXCHANGE
FLOW
RAPID
EXCHANGE
TIMER
HIGH
ENCLOSURE
PRESSURE
ENCLOSURE
POWER
ENGAGED
PRESSURE
LOSS
ALARM
SYSTEM
CONTROL
BYPASSED
POWER
SHUTDOWN
DELAY
EMERGENCY
POWER
SHUTDOWN
RAPID
EXCHANGE
OVERRIDE
EPCU
POWER
ENGAGED
HEP SEP SDT RET
SERIES 4000 ELECTRONIC POWER CONTROL UNIT
Apply air to achieve Safe Pressure
When Safe Pressure Setpoint is achieved,
Safe Enclosure Pressure LED is ON.
Factory setting for Safe Pressure
Setpoint = 1.5” water.
Sequence 5:
Rapid Exchange Solenoid Energized
ENCLOSURE
POWER
DISENGAGED
SAFE
ENCLOSURE
PRESSURE
RAPID
EXCHANGE
FLOW
RAPID
EXCHANGE
TIMER
HIGH
ENCLOSURE
PRESSURE
ENCLOSURE
POWER
ENGAGED
PRESSURE
LOSS
ALARM
SYSTEM
CONTROL
BYPASSED
POWER
SHUTDOWN
DELAY
EMERGENCY
POWER
SHUTDOWN
RAPID
EXCHANGE
OVERRIDE
EPCU
POWER
ENGAGED
HEP SEP SDT RET
SERIES 4000 ELECTRONIC POWER CONTROL UNIT
Rapid Exchange Solenoid
engaged after 3 second delay
The following conditions must be satisfied:
Flow Switch
High Pressure Channel
Factory Setting = 8 in. water
Low Pressure Channel
Sequence 6:
Rapid Exchange Timer cycle begins
Sequence 7:
Rapid Exchange Timer cycle complete
ENCLOSURE
POWER
DISENGAGED
SAFE
ENCLOSURE
PRESSURE
RAPID
EXCHANGE
FLOW
RAPID
EXCHANGE
TIMER
HIGH
ENCLOSURE
PRESSURE
ENCLOSURE
POWER
ENGAGED
PRESSURE
LOSS
ALARM
SYSTEM
CONTROL
BYPASSED
POWER
SHUTDOWN
DELAY
EMERGENCY
POWER
SHUTDOWN
RAPID
EXCHANGE
OVERRIDE
EPCU
POWER
ENGAGED
HEP SEP SDT RET
SERIES 4000 ELECTRONIC POWER CONTROL UNIT
Rapid Exchange ends
Solenoid De-engaged
Enclosure Power energized