Campbell Scientific CR1000KD CR1000 Measurement and Control System - Page 266
Writing High-Frequency Data to CF
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Section 7. Installation Figure 84: Running-average signal attenuation 7.8.20 Writing High-Frequency Data to CF An advanced method for writing high-frequency time-series data to CompactFlash (CF) cards is now available for CR1000 dataloggers. It supports 16-GB or smaller CF cards. It improves the user interface by allowing smaller, userdetermined file sizes. This may be the most suitable method for writing to CF cards, especially in high-speed measurement applications. 7.8.20.1 TableFile() with Option 64 Option 64 has been added as a format option for the CRBasic instruction TableFile(). It combines the speed and efficiency of the CardOut() instruction with the flexibility of the TableFile() instruction. CF cards up to 16 GB are supported. TableFile() with Option 64, TOB3 is now available in CR1000 operating systems 25 or greater. TableFile() is a CRBasic instruction that creates a file from a data table in datalogger CPU memory. Option 64 directs that the file be written in TOB3 format exclusively to the CRD: drive1. Syntax for the TableFile() instruction is as follows: TableFile(FileName, Option, MaxFiles, NumRecs/ TimeIntoInterval, Interval, Units, OutStat, LastFileName) where Option is given the argument of 64. Refer to CRBasic Editor Help2 for a detailed description of each parameter. Note The CRD: drive (the drive designation for the optional CF card) is the only drive that is allowed for use with Option 64. Note Larger cards are primarily intended for storing high-frequency data in applications wherein storage cards are changed out frequently. Large cards may 266
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