CA-500 Series S/M 2-4 Revised December 2001 8
2.3 PRESSURE CIRCUIT
2.3.1 Structure
The pressure circuit of this system consists of two circuits: the pressure circuit designed for filling solution by the
pressure pump and the vacuum circuit designed for liquid draining by the vacuum pump.
The pressure system comprises the pressure pump, circuit for its control, pump driving circuit, a bottle for filling,
and a valve for filling line circuit.
The vacuum circuit system comprises the vacuum pump, pump driving circuit, and drain line circuit with a waste
bottle.
For the hydraulic circuit that uses pressure to flow rinse solution.
2.3.2 Operation
(1) Outline of Pump Operation
The filling and draining by this system are performed by the pressure and vacuum. Therefore the
pressure is applied to the rinse bottles connected to the outside of the system.
(a) Pressure System
The pressure system generates pressure by the pressure pump, and utilizes the pressure sensor to
monitor and control the generated pressure to maintain a predetermined amount of rinse solution.
The rinse solution in the rinse bottle is kept under a certain pressure by the pressure controlling, and
it is supplied by opening the valve connected to the system.
(b) Vacuum System
The vacuum circuit is released to the atmosphere at the rinse cup. The vacuum pump operates only
at the time of draining to aspirate the waste into its bottle. The vacuum circuit is not monitored.
Instead, checking is made on whether or not the liquid level becomes abnormal when the sample
probe moves into the Probe Rinse Cup (inside) (if waste is not drained properly, the drain error
occurs).
(2) Specifications/Functions
(a) Pressure Pump
Pump type:
Drive power supply: AC 100 V, 50/60 Hz
Pressure generation: Over 300 g/cm
2
(b) Vacuum Pump
Pump type:
Drive power supply: AC 100 V, 50/60 Hz
Vacuum generation: Over -100 g/cm
2
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