Campbell Scientific PWS100 Present Weather Sensor - Manual (Page 47)

Section 7. Operation
10. DC voltage of upper detector greater than 1.5 V. This can be caused
by sun directly shining into lens or a pws fault.
11. DC voltage of lower detector greater than 1.5 V. This can be caused
by sun directly shining into lens or a pws fault.
12. Particle processor is unable to process all particles due to limited time
and buffer resources. Particles are missed and data could be
inaccurate. This alarm may activate when there are 120 or more
particles per second going through the volume, sustained for a period
that fills all available space in the buffers.
13. Particle processor lags real time by more than 5% of the user
requested statistics interval.
14. Particle stripper is unable to process all particles due to limited time
and buffer resources. Particles are missed and data will be inaccurate.
This alarm may activate if there are more than ~150 particles per
second going through the volume.
15. Reserved for future use. Outputs ‘0’.
16. Reserved for future use. Outputs ‘0’.
7.4.1.9 Message Field 25 Fault Status of the PWS100
This field will output the fault status of the PWS100. The value output is from
0 to 4. 0 = no fault, 1 = Possible degraded performance, 2 = Degraded
performance, 3 = Maintenance required, 4 = Laser fault.
7.4.1.10 Message Field 30 External Sensor Temperature, RH% and Wetbulb
This field will output the averaged temperature ( °C), sampled relative humidity
and averaged wetbulb temperature ( °C) calculated over the Message_Interval
defined.
7.4.1.11 Message Field 31 External Sensor Maximum and Minimum Temperature
This field will output the maximum and minimum temperature ( °C) calculated
over the Message_Interval defined.
7.4.1.12 Message Field 33 External Sensor Wetness
This field will output the sampled wetness (0-100%).
7.4.1.13 Message Field 34 External Sensor Aux
This field will output the sampled auxiliary sensor output. Such an auxiliary
sensor needs to be defined.
7.4.1.14 Message Field 40 Precipitation Intensity
This field will output the precipitation intensity (mm / hour) calculated over the
Message_Interval defined.
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