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When the MSG button is displayed, it indicates that one or more warnings have been
issued. To view the warning messages, press the MSG button. Repeatedly pressing this
button will cycle through all available warning messages. Pressing CLR will clear the
warning message from the display. Note: If the conditions that caused the warning
messages are still in effect, the warning messages will re-appear after they have been
cleared.
The ALRM button is displayed when concentration alarms have been triggered. See
Section 2.3.3 for operation of the Alarm menu.
2.3.3 Alarm Status Menu
Pressing the ALRM button from the main menu when alarms have been triggered will
bring up the alarm status menu as shown below in Figure 2.3.
CLR
BEEP EXIT
A
LARM STATUS HI=ACTIVE, HI HI=OK
FIGURE 2.3 - ALARM STATUS MENU
Clearing Alarms
If the monitor is configured for Latching type alarms, and either of the alarms can be
cleared (ie. The concentration has dropped below the alarm threshold,) then a CLR
button will appear as shown in Figure 2.3 above. The CLR button will clear the alarm
condition.
If the monitor is configured for Non-Latching alarms, the CLR button will not appear,
and all alarms will automatically clear when the concentration drops below the alarm
threshold.
Audible Beeper
An audible beeper is sounded when any alarm is activated. A slow beep indicates that
the ‘HI’ alarm has been triggered, and a fast beep indicates that the ‘HI-HI’ alarm has
been triggered. Pressing the BEEP button from the alarm menu will silence the audible
beeper for 5 minutes. Note: Pressing the BEEP button does not clear any of the alarms,
it simply silences the audible alarm. If the alarms are not cleared, the audible alarm will
automatically resume in 5 minutes.
See Sections 3.1 and 3.5 for details on configuring concentration alarms.
P/N 02826B1 Teledyne API Model 450H O
3
Monitor Instruction Manual - Page 31