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Simplified Interface - DENT Instruments

Simplified Interface - DENT Instruments

The argument mm/dd/yy

The argument mm/dd/yy hh:mm = month/day/year hour:minute of the first record to be exported. All data from the time specified (inclusive) through the last record in the logger (most recent) will be downloaded when the logger receives the EXPORT command. The SELECT /* [mm/dd/yy hh:mm] is most often used for on-going data collection projects where only new data is desired and it is to be automatically appended to the existing data file. There are other SELECT commands available and they are described below. Example: command >SELECT /* 09/14/98 14:00 (line feed) returns > EXPORT Exports data according to the last SELECT command received by the logger. Example: command >EXPORT (no line feed) returns 1,10/01/98,16:39:00,+0073.2,0,000.00 2,10/01/98,16:40:00,+0073.2,0,000.00 3,10/01/98,16:41:00,+0073.9,0,000.00 : : 9,10/01/98,16:47:00,+0073.5,0,000.00 10,10/01/98,16:48:00,+0073.4,0,000.00 (line feed and carriage return) (second line feed, without a prompt) The data continues to be sent until the SELECT command is satisfied There is no prompt after the end of the data Note: Since the logger keeps track of the last data record the logger sent it is not always necessary to use a SELECT command with EXPORT. An EXPORT command issued to the logger without a SELECT command preceding it will cause the logger to download its data beginning with the first record in the logger following the last downloaded record. The danger in not sending SELECT with each data download occurs when 2 or more computers are used to download data from the same logger(s). The logger has no record of who last requested data, only what data it sent. Multiple computers accessing the same logger may have gaps in their data if each computer does not send a SELECT command prior to retrieving data. C? Returns logger’s clock time in a hh:mm:ss mm/dd/yy format. The clock uses a 24 hour format. Example: command >C? (line feed) returns 15:42:52 09/18/98 > C! hh:mm:ss mm/dd/yy Sets logger’s real-time clock. 4

This command is used to keep the logger’s clock in synchronization with a host computer that is doing the data retrieval and to compensate for any drift in the logger clock The logger clocks do not compensate for daylight savings time. Example: command >C! 18:44:00 09/18/98 (line feed) returns (second line feed and carriage return) > Additional Commands SELECT /1 mm/dd/yy hh:mm Sets the logger to EXPORT only one data record at the date and time specified. Format and function is similar to the SELECT /* command described above. SELECT /H mm/dd/yy hh:mm - Sets the logger to EXPORT all data from the time specified in the argument (inclusive of the argument time) until the end of the hour (exclusive of the beginning of the next hour). The number of records that are retrieved with this command depend on the integration interval set in the logger and the time given in the argument. For example, if the logger is set to record 5 minute interval data and the argument time in the minutes section (mm) of the SELECT command is xx:40 then 4 records will be returned (xx:40, xx:45, xx:50, xx:55). Format and function is similar to the SELECT /* command described above. SELECT /D mm/dd/yy hh:mm - Sets the logger to EXPORT all data from the time specified in the argument (inclusive of the argument time) until the end of the day (exclusive of midnight). The number of records actually retrieved depends on the time specified in the argument and the integration interval set in the logger as described in SELECT /H, above. Format and function is similar to the SELECT /* command described above. VERSION Returns EPROM (logger software) version number DENT loggers are continually being improved, enhanced and given new capabilities. The EPROM version number is most often used by the factory for trouble-shooting and to answer questions about features and capabilities in the logger. Example: command >VERSION (no line feed) returns EUC1B.085 > 5

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