Peak Level Event Alert
A Peak Level Event occurs whenever CO concentrations are greater than
100 PPM. The display will alternate between "PCO" and the currently
measured CO concentration, (0-999), followed by the voice message
"Warning, Carbon Monoxide". This will occur even if the unit HAS NOT
YET entered alarm condition. (Refer to Section 2 for Alarm Response
Times.) If the CO concentration has returned to 0 PPM, the display will
continue to alternate between "PCO" and the currently measured CO
concentration, 0 PPM. The voice message will discontinue when the
concentration is below 100 PPM, (see Peak Level Memory section
below to display the peak level CO from the event). The display will
alternate continuously on AC power, and will briefly display once every
minute on DC only. This will continue until:
1. The unit goes into alarm or,
2. CO concentration level drops below 100 PPM and the user clears the
Peak CO Memory, (see Peak Level Memory Reset section below).
If the CO concentration is greater than 30 PPM and less than 100 PPM,
the display will indicate the measured CO concentration only. No voice
message will occur.
Peak Level Memory
When the Peak Level button is pressed and held, the display shows the
highest CO reading taken by the CO alarm since its last reset or power
up. The Peak Level display feature will display levels between 30-999
PPM. Although the Peak Level feature will display levels below 30 PPM,
these levels will not result in an alarm no matter how long the device is
exposed to these levels. The Peak Level feature is helpful in identifying if
you have had a CO reading since resetting the alarm.
If the unit has had a CO reading, pressing the Test/Hush button will play
the voice message, "Caution! Carbon Monoxide Previously Detected!",
and then the unit will go into Self Checking mode. Pressing the
Test/Hush button alone will not display a CO reading, nor will it clear the
Peak Level Memory, (see Peak Level Memory Reset section below).
Concentrations of CO between 1 and 30 PPM can often occur in
normal, everyday conditions. Concentrations of CO below 30 PPM may
be an indication of a transient condition that may appear today and
never reappear. Some CO conditions may start out as low level leaks but
could develop into CO concentrations that may become harmful.
6. Operating Characteristics
2549-7201-01_EN.qxp__ 15-6-1 下午1:37 页 14
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