CR200/CR200X Series Dataloggers - Campbell Scientific

Section 9. Programming
DataTable ()
Output Trigger Condition(s)
Output Processing Instructions
EndTable
A data table is essentially a file that resides in CR200(X) memory. The file is
written to each time data are directed to that file. The trigger that initiates data
storage is tripped either by the CR200(X)'s clock, or by an event, such as a high
temperature. Up to 8 data tables can be created by the program for a CR200(X)
(4 data tables for a CR200). The data tables may store individual measurements,
individual calculated values, or summary data such as averages, maxima, or
minima to data tables.
Each data table is associated with overhead information that becomes part of the
ASCII file header (first few lines of the file) when data are downloaded to a PC.
Overhead information includes:
• table format
• datalogger type and operating system version,
• name of the CRBASIC program running in the datalogger
• name of the data table (limited to 16 characters)
• alphanumeric field names to attach at the head of data columns
This information is referred to as "table definitions."
TABLE. Typical Data Table (p. 79) shows a data file as it appears after the
associated data table has been downloaded from a CR200(X) programmed with
the code in CRBASIC EXAMPLE. Definition and Use of a Data Table (p. 79).
The data file consists of five or more lines. Each line consists of one or more
fields. The first four lines constitute the file header. Subsequent lines contain
data.
The first header line is the Environment Line. It consists of eight fields, listed in
TABLE. TOA5 Environment Line (p. 78).
Table 8. TOA5 Environment Line
Field Description Changed via
1 file type (always TOA5) No Change
2 station name DevConfig or Program
3 datalogger model No Change
4 datalogger serial number No Change
5 datalogger OS version Send New OS
6 datalogger program name Send New Program
7 datalogger program signature Send / Change Program
8 table name Change Program
78