Met One Instruments ES-405 - Data Retrieval Commands through the Serial Port; User Communication; Computer Communication; Computer Command Format

ES-405-9800 Manual Rev A Page 28
2. Select to open the downloaded file. The program should prompt you how to delimit the
fields. Select comma.
3. The text file can be opened directly with Excel or similar software. Each data parameter
should appear in its own spreadsheet column, with the correct data header at the top of
each column. You can then save the file as a spreadsheet file if desired.
9.5 Data Retrieval Commands Through the Serial Port
When a serial connection between the computer terminal program and the ES-405 has been
established, you will have access to the ES-405 data files by sending the following commands
through the serial port with keyboard strokes or ASCII characters.
There are two modes of communication:
1. User communication – This is a user interactive mode using simple letter commands for
ease of use.
2. Computer communication – This mode is used for computer-to-device communication. It
has a level of data integrity.
9.5.1 User Communication
In the user communication mode (terminal mode), press the Enter key, <cr>, three times to enter
the mode. In this mode simple character commands can be issued with no <Esc> character
required.
An asterisk character appears during wake-up and after a command has completed. The asterisk
indicates that the instrument is ready for a new command.
Commands are echoed back from the instrument in this mode. Commands are terminated by the
Enter key <cr>.
A help menu can be viewed by sending H, h, or ?; giving all the commands available to the user.
Pressing <Esc>, X<cr> or Q<cr> will exit user mode
Note: After a few minutes, the ES-405 will stop waiting for a command and you will have to send
another series of three carriage returns to reestablish the command prompt connection.
9.5.2 Computer Communication
In the computer communication mode, the command format has an optional level of data integrity
– checksum. This is enabled whenever an <Esc> character is sent to the instrument. Character
echo is suppressed in this mode.
9.5.3 Computer Command Format
The computer command has the following format:
<Esc>Cmd p1 p2*cs<cr>
Computer commands are prefaced with an <Esc> (0x1B) character followed directly by a
command, Cmd, which is variable in length depending on the command. After the command
characters there can be zero or more parameter fields, p1 p2. Each parameter field is delimited by
one or more Space characters (0x20).
A computer command example follows: