Campbell CR800 Especificaciones descargar pdf (Pagina 135)

Section 6. Data Table Declarations and Output Processing Instructions

6-17

the datalogger will determine how many fields are created. If the list of names

is greater than the number of fields, the extra names are ignored. If the number

of fields is greater than the number names in the list of field names, the default

names are used for the remaining fields.

Examples

Sample(4, Temp(1), IEEE4)

FieldNames “IntakeT, CoolerT, PlenumT, ExhaustT”

The 4 values from the variable array temp are stored in the output table with

the names IntakeT, CoolerT, PlenumT, and ExhaustT.

Sample(4, Temp(1), IEEE4)

FieldNames “IntakeT, CoolerT”

The 4 values from the variable array Temp are stored in the output table with 2

individual names and the remainder of the default array Temp:

IntakeT, CoolerT, Temp(3), and Temp(4),

Sample(4, Temp(1), IEEE4)

FieldNames “IntakeT(2)”

The 4 values from the variable array Temp are stored in the output table with

IntakeT,an array of 2, and the remainder of the default array Temp:

IntakeT(1), IntakeT(2), Temp(3), and Temp(4),

Histogram (BinSelect, DataType, DisableVar, Bins, Form, WtVal, LoLim,

UpLim)

Processes input data as either a standard histogram (frequency distribution) or

a weighted value histogram.

The standard histogram counts the time that the bin select variable is within a

particular sub-range of its specified range. The count in a bin is incremented

whenever the bin select input falls within the sub-range associated with the

bin. The value that is output to the data table for each bin can either be the

accumulated total count for each bin or a relative fraction of time computed by

dividing the accumulated total in each bin by the total number of scans. This

form of output is also referred to as a frequency distribution.

The weighted value histogram does not add a constant to the bin but instead

adds the current value of a variable. That variable name is entered as the

weighted value. Each time the instruction is executed, the weighted value is

added to a bin. The sub-range that the bin select value is in determines the bin

to which the weighted value is added. When the histogram is output, the value

accumulated in each bin can be output or the totals can be divided by the

TOTAL number of input scans and then output. These values are the

contributions of the sub-ranges to the overall weighted value. A common use

of a closed form weighted value histogram is the wind speed rose. Wind speed

values (the weighted value input) are accumulated into corresponding direction

sectors (bin select input).

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