Operating and Maintenance Instructions : FCU 2110-5 / FCU 2210-5
Edition 1.10
HYDAC Filtertechnik GmbH
Page 14 of 52
The electronic evaluation module (4) continuously measures the particle counts, computes the NAS
(only for FCU 2110-5) or ISO purity ratings for the prescribed reference volume of 100ml on the basis
of the measurement signals of the optical sensor and the flow rate meter.
The measurement results (up to 3,000) are continuously stored in the evaluation module along with
the date and time in a manner providing for protection in the event of a power outage. This is ensured
by a battery-buffered real-time clock and memory
A flow control valve (7) is featured for adjusting the oil current independently of the line pressure and
pressure fluctuations.
A hydraulic filter (8) featuring an electric clogging indicator is integrated upstream of the flow control
valve to protect it against outage as the result of contaminant particle buildup.
A ball valve (18) allows to switch between the suction inlet and the pressure inlet.
The permanently set valves (9) (800 ml/min max) and (10) (30 bar max.) and the diaphragm
accumulator (15) enable connection to sampling points for a pressure range of 1 - 350 bar at the
pressure inlet. The shut-off valve (17) only opens when a measurement is ongoing.
The pump (16) allows to measure from non-pressurized reservoirs via the suction inlet.
The FCU can be operated via the keypad (12). Measurement parameters can be modified and various
items selected in the LCD (6).
Unless a different setup is entered, the following is continuously shown during measurement by
default:
•
Current flow rate
•
Current ISO rating classification
•
Tendency reading of ISO rating classification (
↑
=rising level,
↓
= falling level)
•
Error messages, only in the event of a fault or malfunction (see chapter Error Messages)
In addition, the FCU features 3 integrated relays providing for the following functions:
Relays 1 and 2
Limit contacts
(normally open contacts)
For example, a filter pump unit can be controlled using relays 1 and 2.
Relay 3
DEVICE READY signal
(normally closed contact)
Relay 3 is used for unit self-monitoring.
The integrated microprocessor provides for continuous monitoring of the following:
•
particle sensor
•
filter clogging indicator
