Users Manual

Operating Manual Smart Weather Sensor
G. Lufft Mess- und Regeltechnik GmbH, Fellbach, Germany 21
6.12 Precipitation Quantity - Absolute
Sampling rate Event-dependent on reaching the response threshold
Response threshold 0.01mm (Radar)
Response threshold 0.2 / 0.5 mm (Rain Gauge)
Units l/m²; mm; in; mil
Request channels:
UMB Channel
Measurement Variable (float32)
Unit
600
Precipitation Quantity - Absolute
l/m²
620
Precipitation Quantity - Absolute
mm
640
Precipitation Quantity - Absolute
in
660
Precipitation Quantity - Absolute
mil
Note: This measurement indicates the accumulated precipitation quantity since the last
device reboot. The measurement is retained for the duration of a short power failure. To
reset this value, use the corresponding function in the UMB-Config-Tool (see page 40) or
disconnect the device from the power supply. The necessary disconnected time is device
dependent from a few seconds up to 1 h.
6.13 Precipitation Quantity - Differential
Sampling rate Event-dependent on reaching the response threshold
Response threshold 0.01mm (Radar)
Response threshold 0.2 / 0.5 mm (Rain Gauge)
Units l/m²; mm; in; mil
Request channels:
UMB Chanel
Measurement Variable (float32)
Unit
605
Precipitation Quantity - Differential
l/m²
625
Precipitation Quantity - Differential
mm
645
Precipitation Quantity - Differential
in
665
Precipitation Quantity - Differential
mil
Note: Each request from a differential channel sets the accumulated quantity back to zero. If
the response from the device is lost due to a transmission error (e.g. poor GPRS
connection), the quantity accumulated to date is also lost. The quantity accumulated to date
is also reset each time the equipment is rebooted.
6.14 Precipitation Intensity
Sampling rate 1 minute
Response threshold 0.01 mm/h
Units l/m²/h; mm/h; in/h; mil/h
Request channels:
UMB Channel
Measurement Variable (float32)
Range
Unit
800
Precipitation Intensity
0 … 200.00
l/m²/h
820
Precipitation Intensity
0 … 200.00
mm/h
825
Precipitation Intensity (WS100 only)
0 ... 3.3333
mm/min
840
Precipitation Intensity
0 … 7.8740
in/h
845
Precipitation Intensity (WS100 only)
0 ... 0.13123
in/min
860
Precipitation Intensity
0 … 7874.0
mil/h
Note: The lower resolution of the rain gauge would lead to high fluctuation of the intensity
values, so the rain gauge versions (WS401-UMB and WS601-UMB), as well as the external
rain gauge, use the accumulated precipitation of the last 60 minutes prior to the current
measurement for intensity calculation.