2-14
USER HANDBOOK
2.8 ALARMS RESET OR ACKNOWLEDGE
When the instrument detects an alarm set point has been
reached, the audible and visual alarms will be activated to
alert the user.
The alarms are individually programmable to be either:
• Latching - alarms will stay on until the user resets by a
press an hold of the button, when the gas reading has
returned within the pre-set alarm limits.
• Non-Latching - the audible and visual alarms will reset
automatically when the reading returns within the pre-set
alarm limits.
Caution: The PS500 can be supplied with a ammable
gas sensor. This sensor is designed for use in
concentrations of gas not exceeding the Lower
Explosive Limit (LEL). An inbuilt alarm feature
will be activated if the instrument is exposed to
high concentrations of ammable gas.
See ”3.3 HIGH FLAMMABLE GAS OVER-RANGE
ALARM” on page 3-5.
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