ALARMS
The monitor is equipped with two alarms. Alarm 1 is the lower alarm value, and
Alarm 2 is the higher alarm value. Alarm 1 is factory set 35 PPM, and Alarm 2 is
factory set to 200 PPM. When the displayed value reaches the alarm setting, the
appropriate alarm descriptor will turn on.
The lowest setting of Alarm 1 is limited to 35 PPM to avoid false alarms. Alarm
2 must be set a minimum of 100 PPM higher than Alarm 1.
To change an alarm setting, index the menu until the lower left display reads AL
1 or AL 2 and use the keys to set the desired alarm setting.
Press the key to store the setting.
The monitor is equipped with both audio and visual alarms. When Alarm 1 is
reached, the audio alarm will beep and the visual alarm will flash. The speed of
the audio beeping and visual flashing will increase until Alarm 2 is reached. At
this point the audio and visual alarms will be on continuously. The Audio and
Visual alarms are factory set to be on. To turn the Visual alarm off, index the
menu until ALF (Alarm Flasher) is displayed in the lower left display. Then use the
key to turn the Visual alarm off. The upper display will read OFF. Then
press to store the change. To turn the Visual alarm back on, press the
key, then press to store the change. The Audio alarm may be
turned off or on in the same way as the Visual alarm by indexing the menu until
the lower left display reads ALb (Alarm Beeper).
Zero Adjustment:
Place the instrument in a CO free environment. Allow the instrument to stabilize
at least three minutes. The instrument should read Ø PPM. If it reads >10 PPM,
the sensor is bad and should be replaced. If it reads 1 to 9 PPM, the zero may
be adjusted as follows:
1. Index the menu to CAL0.
2. Press the and keys simultaneously. Index the menu back to the
home position. The display should now read Ø PPM.
HOLD
STORE
ENTER
ON
OFF
BACKLIGHT
INDEX
HOLD
STORE
ENTER
ON
OFF
BACKLIGHT
INDEX
HOLD
STORE
ENTER
ON
OFF
BACKLIGHT
INDEX
HOLD
STORE
ENTER
ON
OFF
BACKLIGHT
INDEX
HOLD
STORE
ENTER
ON
OFF
BACKLIGHT
INDEX
HOLD
STORE
ENTER
ON
OFF
BACKLIGHT
INDEX
HOLD
STORE
ENTER
ON
OFF
BACKLIGHT
INDEX
HOLD
STORE
ENTER
ON
OFF
BACKLIGHT
INDEX
HOLD
STORE
ENTER
ON
OFF
BACKLIGHT
INDEX
4
d-25small 11/5/02 3:02 PM Page 4
