“EXIT” whilepressing “SET” and release to enter thesecondary menu. Press
“SET” repeatedly until the display reads “ProbE”. This is the menu selection.
Press “UP” repeatedly until the serial interface menu is indicated with “SE-
rIAL”. Finally press “SET” to enter the serial parameter menu. In the serial in-
terfaceparameters menu are the BAUD rate, the sample rate, the duplex mode,
and the linefeed parameter.
9.1.2.1 BAUD Rate
The BAUDrate is the first parameter in the menu. The display prompts with
the BAUDrate parameter by showing “BAUd”. Press “SET” to choose to set
the BAUDrate. The current BAUD rate value is displayed. The serial commu-
nicationsBAUD rate may be programmed to 300, 600, 1200, or 2400 BAUD.
The BAUDrate is pre-programmed to 1200 BAUD. Use “UP” or “DOWN” to
change the BAUDrate value. Press “SET” to set the BAUD rate to the new
valueor “EXIT” to abo rt the operation and skip to the next parameter in the
menu.
9.1.2.2 Sample Period
The sampleperiod is the next parameter in the menu and prompted with “SAm-
PLE”. The sample period isthe time period in seconds between temperature
measurements transmitted from the serial interface.If the sample r ate is set to
5, the instrumenttransmits the current measurement over the serial interface ap-
proximatelyevery five seconds. The automatic sampling is disabled with a
sample period of 0. Press “SET” to choose to set thesample period. Adjust the
period with “UP” or “DOWN” and then use “SET” to set the sample rate to the
displayedvalue.
9.1.2.3 Duplex Mode
The nextparameter is the duplex mode indicated with “”. The duplex mode
may be setto half duplex (“HALF”) or full duplex (“FULL”). With full duplex
anycommands received by the thermometer via the serial interface are immedi-
ately echoed or transmitted back to the deviceof origin. With half duplex the
commands are executedbut not echoed. The default setting is full duplex. The
mode may be changed using“UP” or “DOWN” and pressing “SET”.
9.1.2.4 Linefeed
The finalp arameter 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 withlinefeed on. The mode may b e changed using “UP” or “DOWN”and
pressing “SET”.
44 HartScientific
9Digital Communication Interface