GasAlertMicroClip
User Manual
22
Low Alarm
Enter the low alarm setpoints for each sensor. Refer to Factory Gas
Alarm Setpoints for factory defined alarm setpoints.
Applicable to all sensors.
High Alarm
Enter the high alarm setpoints for each sensor. Refer to Factory Gas
Alarm Setpoints for factory defined alarm setpoints.
Applicable to all sensors.
TWA Alarm
The time-weighted average (TWA) is a safety measure used to
determine accumulated average exposure to gases. An average is
determined using the US Occupational Safety and Health Administration
(OSHA) method to ensure the worker is warned when the maximum
average is accumulated.
The US OSHA method is defined as a moving average that accumulates
over an 8-hour average. If the worker is in the field longer, the oldest
accumulated values (first hour) are replaced by the newest values (ninth
hour). This continues for the duration of the work shift until the detector is
deactivated.
TWA Alarm applies to CO and H
2
S sensors only.
1. Refer to Factory Gas Alarm Setpoints
for the factory alarm
setpoints.
2. Enter the setpoint in the TWA Alarm field.
STEL Alarm
The short-term exposure limit (STEL) is the maximum permissible gas
concentration a worker can safely be exposed to for short periods of time
(5-15 minutes maximum).
STEL Alarm applies to CO and H
2
S sensors only.
Note
Standard factory Alarm Setpoints vary by region. Refer to
Factory Gas Alarm Setpoints
for OSHA factory settings.
1. Refer to the applicable regulatory requirements in your area for
defining STEL alarm setpoints.
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