Campbell Scientific CS725 Snow Water Equivalency Sensor - Manual (Page 21)

CS725 Snow Water Equivalency Sensor
[4] Delay after start of measure for data transmission (secs.)
This defines the time at which the calculated results from the previous
24-hour period will be automatically transmitted from the serial port.
It is recommended to set the value to zero in order to disable the
automatic transmission of data via the serial port.
This is in seconds after the start of the new 24-hour period. The
minimum value should be 300 in order to allow the calculations to
complete. The maximum value is 23 h 55 min (86100 seconds) in the
case of one transmission every 24 hours, and 5 h 55 min (21,300
seconds) in the case of one transmission every 6 hours. This option is
set with parameter [5]. There will be four transmissions spaced by 6
hours.
[5] Frequency of data transmission: 0 => every 24 h 1 => every 6 h
This configures the Automatic Data output, and allows output every
24 h or every 6 h.
This parameter is a flag to instruct the software to transmit the
calculated data once a day (value = 0), or once every 6 hours (value =
1). All data output configured with this parameter is relative to the
“Time of start of measure” parameter.
It should be noted that the daily output transmission consists of four
averaged values from four overlapping 24-hour periods, which are
offset by 6 hour intervals.
When the every 6 hours mode is selected, the same four periods will
be transmitted, but one at the time, as they become available.
[6] CS725 height above ground in centimeters
Enter the actual installed height of the CS725 above the ground,
measured from the bottom of the main body, not from the collimator.
This is a parameter used in the SWE calculation to account for the
absorption of gamma rays in air.
[7] Observed position for the K line on the histogram
This is a parameter used by the peak finding and identifying
algorithm, in order to properly frame the search window. It is the bin
position at which the
40 K isotope peak is observed on the histogram.
This is to allow for small shifts in the detector gain. The format is an
integer with a value equal or close to 245.
[8] Collim (1: Collimator installed; 0: no collimator)
This parameter indicates whether the collineator is being used with
the CS725. Be sure to select the appropriate configuration, as this
does affect the proper function of the CS725.
[9] Nominal soil humidity in % weight (min: 1, max: 150)
The value (site specific) for the soil humidity is used to account for
the amount of water in the soil. This quantity is defined for a unit
volume of soil as
100 (mass of water/mass of dry soil)
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