Instruction manual

1995" would read as shown (FIGURE 2-25) at 7:06 p.m.
Measuring Gas Concentrations
Combustible Gases (COMB)
The FiveStar Alarm detects combustible gases in the atmosphere.
The Alarms sound when concentrations reach:
• Alarm setpoint, or
• 100% LEL (Lower Explosive Limit), or
• 5% CH
4
(Methane by volume)
When the combustible gas indication
reaches the Alarm Setpoint:
• Alarm sounds
• Alarm lights flash
• Press the RESET button to
silence the alarm. (The alarm
will stay silent if the alarm
condition has cleared.)
• Concentration of gas flashes in the
display (FIGURE 2-26).
When the combustible gas indication reaches 100% LEL or 5%
CH4 of the combustible gas:
• Alarm sounds
• Alarm lights flash
• This alarm cannot be reset with the RESET button.
The LockAlarm circuit locks the combustible gas reading and
alarm if the gas reading exceeds 100% LEL or 5% methane.
• OVER appears on the display.
"
WARNING
If the OVER alarm condition is reached, you may be in a
life-threatening situation; there may be enough gas in the
atmosphere for an explosion to occur. In addition, any rapid
up-scale reading followed by a declining or erratic reading can
also be an indication that there is enough gas for an explosion.
If either of these indications occur, leave and move away from
Figure 2-26.
Combustible Gas Alarm
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Instruction Manual Chapter 2, Using the FiveStar Alarm
FiveStar Alarm 2-13