Reading the analog output
NAS 1638 - National Aerospace Standard (CS 13xx only)
The following NAS values can be read out via the analogue output:
• NAS Maximum
Only one value is output.
• NAS (2 / 5 / 15 / 25)
All values are sequentially time-coded before output.
• NAS 2 / NAS 5 / NAS 15 / NAS 25
Only one value is output in each case.
• NAS+T
All values are sequentially time-coded before output.
• HDA.NAS
All values are sequentially time-coded before output.
This signal is planned for the HDA 5500, but it can be used also in other
applications.
The current 4.8 - 19.2 mA or voltage 2.4 - 9.6 V of the output signal,
depending on the NAS contamination class being 0.0 - 14.0 (resolution 0.1
class) or on an error, is described as below:
Current I
NAS class / error
Voltage U
I < 4.00 mA
Cable break
U < 2.00 V
4.0 mA < I < 4.1 mA
Device error /
The CS is not ready
2.00 V < U < 2.05 V
4.1 mA < I < 4.3 mA
Not defined
2.05 V < U < 2.15 V
4.3 mA < I < 4.5 mA
Flow error (The flow rate is
too low.)
2.15 V < U < 2.25 V
4.5 mA < I < 4.8 mA
Not defined
2.25 V < U < 2.40 V
I = 4.80 mA
NAS 0
U = 2.4 V
…
…
…
I = 19.20 mA
NAS 14.0
U = 9.60 V
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
ContaminationSensor CS1000
en(us)
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2017-09-25
Summary of Contents for CS 1000 Series
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