HYDAC CS 1000 - Manual (Page 71)

ContaminationSensor CS1000 Analog Output (ANAOUT)
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BeWa CS1000 3247149n en 2009-02-04.doc 2009-02-04
Current I NAS class / error Voltage U
19.2 mA < I < 19.8
mA
Not defined 9.60 V < U < 9.90 V
19.8 mA < I < 20 mA No measured value 9.90 V < U < 10 V
The current (I) or voltage (U) can be calculated for a given NAS contamination
class as follows:
I = 4.8 mA + NAS class x (19.2 mA - 4.8 mA) / 14
U = 2.4 V + NAS class x (9.6 V - 2.4 V) / 14
The current I or voltage U can be calculated for a given NAS contamination class
as follows:
NAS class = (I - 4.8 mA) x (14/14.4 mA)
NAS class = (U – 2.4 V) x (14/7.2 V)
NAS Maximum ( NAsMAX )
The
NAsMAX
value designates the largest of the 4 NAS classes.
NAS class 2 µm 5 µm 15 µm 25 µm
Particle size 2-5 µm 5-15 µm 15 µm > 25 µm
The signal is updated after the measuring period has elapsed (the measuring period
is set in the Power Up menu, factory setting = 60 s).
The
NAsMAX
signal is output depending on the maximum NAS class.
Example:
NAS classes NAsMAX
(NAS Maximum)
NAS 6.1 / 5.7 / 6.0 / 5.5 6.1
For basic information about cleanliness classes, see Chapter 0.
The NAS classification consists of whole numbers. Quicker change / trend
recognition is due to a resolution of 0.1 contamination classes.
Decimal values are converted to integers by rounding up.
For example, a readout of NAS 10.7 corresponds to NAS 11.