22 • Chapter 3: Measuring Mode
04 Series for CO(-H2)
H2 RICH
Concentration of hydrogen rises
above 2000 ppm (parts per million).
•
H2
and
rich
alternate on the top line
•
OVER
appears at the bottom of the
LCD
• Alarm LED flashes twice per second
• Backlight turns on
• High-low tone sounds
twice per second
• Vibrator pulses twice per
second
Over Range
• Gas reading is replaced with a
flashing
• Gas name and units flash
•
OVER
appears at the bottom of the
LCD
• Alarm LED flashes twice per second
• Backlight turns on
• High-low tone sounds
twice per second
• Vibrator pulses twice per
second
Minus Over Range
• Affected channel’s gas reading is
replaced with a flashing “
- - - -”
• Gas name and units flash
•
M OVER
appears at the bottom of
the LCD
• Alarm LED flashes twice per second
• Backlight turns on
• High-low tone sounds
twice per second
• Vibrator pulses twice per
second
Low Battery Warning
• The last bar in the battery icon starts
flashing
None
Dead Battery Alarm
• Gas reading disappears.
FAIL
BATTERY
appears on the LCD.
• Alarm LED flashes once per second
Double pulsing tone sounds
once per second
Sensor Failure
•
FAIL SENSOR
appears on the LCD.
• Alarm LED flashes once per second
Double pulsing tone sounds
once per second
Clock Failure
•
FAIL 050 CLOCK
appears on the
LCD
• Alarm LED flashes once per second
Double pulsing tone sounds
once per second
System Failure
• FAIL SYSTEM
and an error code
appear on the LCD
•
Alarm LED flashes once per second
Double pulsing tone sounds
once per second
Table 4: Alarm Types and Indications
Alarm Type
Visual Indications
Other Indications