GasAlertMicro
Quick Reference Guide
2
⇒ BW recommends to “bump test” the sensors,
before each day’s use, to confirm their ability
to respond to gas by exposing the detector to
a gas concentration that exceeds the high
alarm setpoints. Manually verify that the
audible and visual alarms are activated.
Calibrate if the readings are not within the
specified limits.
⇒ It is recommended that the combustible
sensor be checked with a known
concentration of calibration gas after any
known exposure to catalyst
contaminants/poisons (sulfur compounds,
silicon vapors, halogenated compounds, etc.).
⇒ Only the combustible gas detection portion of
this instrument has been assessed for
performance.
⇒ The combustible sensor is factory calibrated
to 50% LEL methane. If monitoring a different
combustible gas in the % LEL range, calibrate
the sensor using the appropriate gas.
⇒ Caution: High off-scale readings may indicate
an explosive concentration.
⇒ Electromagnetic interference may cause
incorrect operation under certain
circumstances.
⇒ Protect the combustible sensor from exposure
to lead compounds, silicones, and chlorinated
hydrocarbons. Although certain organic
vapors (such as leaded gasoline and
halogenated hydrocarbons) may temporarily
inhibit sensor performance, in most cases, the
sensor will recover after calibration.
⇒ Any rapid up-scaling reading followed by a
declining or erratic reading may indicate a gas
concentration beyond upper scale limit, which
may be hazardous.
⇒ Do not change or charge batteries in a
hazardous location. Doing so will impair the
Intrinsic Safety of the unit and may lead to fire
or explosion.
⇒ For use only in potentially explosive
atmospheres where oxygen concentrations do
not exceed 20.9% (v/v).
⇒ Extended exposure of the GasAlertMicro to
certain concentrations of combustible gases
and air may stress a detector element, which
can seriously affect its performance. If an
alarm occurs due to high concentration of
combustible gases, recalibration should be
performed, or if needed, the sensor replaced.
