Campbell Scientific CR3000 CR3000 Micrologger - Page 132

Section 7. Installation Table 15. Typical Data Table TOA5 CR3000 CR3000 TIMESTAMP RECORD BattVolt_Avg TS RN Volts Avg 7/11/2007 16:10 0 13.18 7/11/2007 16:20 1 13.18 7/11/2007 16:30 2 13.19 7/11/2007 16:40 3 13.19 7/11/2007 16:50 4 13.19 7/11/2007 17:00 5 13.19 7/11/2007 17:10 6 13.18 1048 PTempC_Avg Deg C Avg 23.5 23.5 23.51 23.54 23.55 23.55 23.55 CR3000.Std.13.06 TempC_Avg(1) Deg C Avg 23.54 23.54 23.05 23.61 23.09 23.05 23.06 CPU:Data.cr3 TempC_Avg(2) Deg C Avg 25.12 25.51 25.73 25.95 26.05 26.05 25.04 35723 OneMin The third header line identifies engineering units for that field of data. These units are declared at the beginning of a CRBasic program, as shown in CRBasic example Definition and Use of a Data Table (p. 132). Units are strictly for documentation. The CR3000 does not make use of declared units, nor does it check their accuracy. The fourth line of the header reports the data process used to produce the field of data, e.g., avg (average), his (historgram), etc. Subsequent lines are observed data and associated record keeping. The first field being a time stamp, the second the record (data line) number. Read More! See table Abbreviations of Names of Data Processes (p. 153) for a list of default field names. As shown in CRBasic example Definition and Use of a Data Table (p. 132), data table declaration begins with the DataTable() instruction and ends with the EndTable() instruction. Between DataTable() and EndTable() are instructions that define what data to store and under what conditions data are stored. A data table must be called by the CRBasic program for data storage processing to occur. Typically, data tables are called by the CallTable() instruction once each Scan. CRBasic Example 14. 'Declare Variables Public Batt_Volt Public PTemp_C Public Temp_C(2) Definition and Use of a Data Table 'Define Units Units Batt_Volt=Volts Units PTemp_C=Deg C Units Temp_C(2)=Deg C 132