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3.4 Setting the time-of-day and date (CLK)
To set the current time-of-day, which is used for determining when to do an automatic
calibration and for time-stamping the RS-232 reports, press SETUP-CLK-TIME. The
CPU will display the current time-of-day as four digits in the format "HH: MM", where
"HH" is the hour in 24-hour format (i.e. hours range from 00 to 23) and "MM" is the
minute (00 - 59). The operator may change the time-of-day and then press ENTR to
accept the new time, or press EXIT to leave the time unchanged.
To set the current date, which is used for time-stamping the RS-232 reports, press
SETUP-CLK-DATE. The CPU will display the current date as "DD MMM YY". For
example, April 1, 1990 would be displayed as "01 APR 90". Change the date by pressing
the button under each field until the desired date is shown. Then press ENTR to accept
the new date or press EXIT to leave the date unchanged.
3.5 Setting the RS-232 baud rate (COMM)
To set the baud rate for the RS-232 channel, press SETUP-COMM-BAUD. Press 300,
1200, 2450, 4800, 9600, or 19.2 followed by ENTR to accept the new baud rate, or
EXIT to leave the baud rate unchanged.
3.6 Setup variables (VARS)
The setup variables are global settings that can be configured by the user. Note: Do not
arbitrarily change these settings since these variables affect the fundamental operation of
the instrument. The setup variables are accessed from the main menu by pressing
SETUP-VARS. Use the PREV or NEXT buttons to scroll to the desired variable and
press EDIT to change the variable. Set the desired value for the variable and press
ENTR to save the value. Pressing EXIT aborts the edit screen without changing the
value. The setup variables available to the user are listed below along with their
description.
0) LATCH_ALARMS
This variable sets the operation of the concentration alarms to either latched or non-
latched mode. In latched mode, when a concentration alarm is triggered, the alarm will
stay on, or latch, until the user resets the alarm through the ALRM menu on the front
panel. When the alarms are set to non-latching mode(LATCH_ALARMS = OFF) the
alarms will automatically turn off when the concentration drops back below the alarm
threshold value.
P/N 02395D1 Teledyne API Model 450 O
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Monitor Instruction Manual - Page 43