ContaminationSensor – CS 2000 series
HYDAC Filtertechnik GmbH
en
Page 25
BeWa CS2000 3117721e en.doc
2008-03-28
6
Description of the Measuring Modes
6.1 Mode
M1:
Measure
Continuous measurement without special switching functions.
The current measurement result is output via the available interfaces after the
measurement interval has elapsed.
6.2
Mode M2: Measure and switch
Continuous measurement, with relays 1 and 2 being switched according to the set
measuring channels, switching functions and limit values.
The current measurement result is output via the available interfaces after the
measurement interval has elapsed.
6.3
Mode M3: Filter until
Measuring mode in which relay 1 is closed, until 5 successive measurements reach
or are cleaner than the set target cleanliness value. Measurement in mode 3 is then
stopped.
Once relay 1 has been opened, it remains open until a measurement is restarted. (A
restart can be triggered using the DIN measurement bus interface, the RS 232
display interface or by switching the electrical power supply off/on.)
6.4
Mode M4: Filter from until
Measuring mode in which relay 1 is closed, until 5 successive measurements reach
or are cleaner than the set target cleanliness value (lower limit).
The relay is then opened and the test cycle time is started. After the test cycle time
has elapsed, relay 1 is closed and a measurement is performed.
If the upper cleanliness value (upper limit) is reached or not exceeded, relay 1
remains closed until 5 successive measurements once again reach or are cleaner
than the set target cleanliness value.
If the upper cleanliness value (upper limit) is not reached or was exceeded, relay 1
is opened again and the test cycle time is restarted.
6.5
Switching behavior of the relays:
The following table describes the switching behavior of the three relays in the
various measuring modes.
The position of the relays is updated after a measurement interval has elapsed, by
comparing the current measured values with the limit values.
Directly after the CS is switched on, the Common (C) and Normally Closed (NC)
contacts of all relays are connected together. As soon as the operational readiness
of the CS has been established, the C and NO contacts are connected together on
the Ready relay.
