HYDAC International CS1000 Series, Operating And Maintenance Instructions Manual

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Analog output
HYDAC Filtersysteme GmbH en Page 70
BeWa CS1000 3247149l en.doc 2006-07-24
19.2 mA < I < 19.5 mA Not defined 9.60 V < U < 9.75 V
19.5 mA < I < 19.7 mA Flow error (flow too high) 9.75 V < U < 9.85 V
19.7 mA < I < 19.8 mA Not defined 9.85 V < U < 9.90 V
19.8 mA < I < 20 mA No measured value 9.90 V < U < 10 V
The NAS class can be calculated for a given current I or voltage U as follows:
I = 4.8 mA + NAS class * (19.2 mA - 4.8 mA) / 14
U = 2.4 V + NAS class * (9.6 V - 2.4 V) / 14
The current I or voltage U can be calculated for a given NAS class as follows:
NAS class = (I - 4.8 mA)*(14/14.4 mA)
NAS class = (U - 2.4 V)*(14/7.2 V)
11.4.2 NAS Maximum
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 15-25 µm > 25 µm
The signal is updated after the measuring time has elapsed (the measuring time is set in the Power
Up menu / default: 60 s).
The NASMAX signal is a mA signal corresponding to this maximum SAE class.
Example:
NAS-class NASMAX
NAS 6.1 / 5.7 / 6.0 / 5.5 6.1
For basic information about cleanliness classes, see section 17.
The NAS classification consists of whole numbers. A resolution of 0.1 cleanliness classes is
implemented in order to enable a change or trend to be detected.
To convert a decimal value to an integer, the decimal value has to be rounded up. For example, a
readout of NAS 10.7 corresponds to NAS 11