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6102 Micro-Bath User's Guide
Serial Communications
10.1.2.1
10.1.2.2
10.1.2.3
10.1.2.4
10.1.3
46
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interface parameters menu are the BAUD rate, the sample rate, the duplex mode, and
the linefeed parameter.
Baud Rate
The baud rate is the first parameter in the menu. The display will prompt with the
baud rate parameter by showing "bAUd". Press "SET" to choose to set the baud rate.
The current baud rate value will then be displayed. The baud rate of the 6102 serial
communications may be programmed to 300, 600, 1200, 2400, 4800, or 9600 baud.
The baud rate is pre-programmed to 2400 baud. Use "UP" or "DOWN" to change the
baud rate value. Press "SET" to set the baud rate to the new value or "EXIT" to abort
the operation and skip to the next pa rameter in the menu.
Sample Period
The sample period is the next parameter in the menu and prompted with "SPEr".
The sample period is the time period in seconds between temperature measurements
transmitted from the serial interface. If the sample rate is set to 5, the instrument
transmits the current measurement over the serial interface ap proximately every five
seconds. The automatic sampling is disabled with a sample period of 0. Press "SET"
to choose to set the sample period. Adjust the period with "UP" or "DOWN" and then
use "SET" to set the sample rate to the displayed value.
Duplex Mode
The next parameter is the duplex mode indicated with "dUPL". The duplex mode
may be set to half duplex ("HALF") or full duplex ("FULL"). With full duplex any
commands received by the thermometer via the serial interface will be immediately
echoed or transmitted back to the device of origin. With half duplex the commands
will be executed but not echoed. The default setting is full duplex. The mode may be
changed using "UP" or "DOWN" and pressing "SET".
Linefeed
The final parameter in the serial interface menu is the linefeed mode. This pa rameter
enables ("On") or disables ("OFF") transmission of a linefeed charac ter (LF, ASCII
10) after transmission of any carriage-return. The default setting is with linefeed on.
The mode may be changed using "UP" or "DOWN" and pressing "SET".
Serial Operation
Once the cable has been attached and the interface set up properly the control ler will
immediately begin transmitting temperature readings at the pro grammed rate. The
serial communications uses 8 data bits, one stop bit, and no parity. The set-point and
other commands may be sent via the serial interface to set the temperature set-point
and view or program the various parameters. The interface commands are discussed
in Section 10.2. All commands are ASCII character strings terminated with a carriage-
return character (CR, ASCII 13).
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