HYDAC FILTER SYSTEMS FCU 1210, Инструкция по эксплуатации и техническому обслуживанию

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HYDAC FILTER SYSTEMS GMBH Overview | 4
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4.10 How it works:
From the measurement point (either a pressure port or a reser-
voir or a bottle sample) a continuous oil current is established
through the INLET connector by an electrically controlled gear
pump (16). The suction screen (17) protects the pump from
coarse contamination.
The oil current flows through an optical ContaminationSensor
(1). The contaminant particles contained in the oil current
cause the light beam to be darkened in a pulse-like manner.
An electronic evaluation module (4) classifies and counts these
measurement signals according to particle diameter. The eval-
uation module (4) continuously computes cleanliness classes
with the aid of the measurement signals of the optical sensor
with respect to a measurement volume of 100°ml.
A defined pressure is generated in the oil flow via a counter
balance valve (10). This serves to minimize air bubbles in the
system, which could skew the measurement results.
The pressure relief valve (14) protects the pump and the mea-
suring cell from excessive pressure.
Use the return hose to channel the oil flow out of the port OUT-
LET and into a depressurized tank.
The electronic evaluation module monitors:
– the functioning of the particle sensor
– the oil flow
When a malfunction occurs, an error message automatically
appears in the display and interrupts the measurement. The
evaluation module will recognize when the cause of error has
been corrected, and the unit will reset automatically and re-
sume the measurement operation.