33
GasAlertQuattro
Sensor Configuration
Calibration Interval
Define how often a sensor should be calibrated in the
Calibration Inter-
val (days)
field. A different calibration interval can be defined for each
sensor.
1. Enter the value (
0
-
365
days) for each sensor.
2. Enter
0
to disable the calibration interval option. Entering
0
automatically deactivates the
Force Calibration
option. The
detector is shipped with the factory default setting of
180
days.
a
Caution
BW recommends that the sensors be calibrated at least
once every 180 days (6 months).
Bump Interval
Define how often a bump test should be performed for each sensor in the
Bump Interval (days)
field. A different bump interval can be defined for
each sensor.
1. Enter the value (
1
-
365
days) for each sensor.
2. Enter
0
to disable the bump interval option. Entering
0
auto-
matically deactivates the
Force Bump
user option.
The detector is shipped with the
Bump Interval
default setting
of
0
days.
Note
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 alarm setpoints. Verify that
the audible and visual alarms activate. Calibrate if the readings are
not within the specified limits.
Low Alarm
Define the low alarm setpoints for each sensor. Refer to
for factory defined alarm setpoints.
High Alarm
Define the high alarm setpoints for each sensor. Refer to
for factory defined alarm setpoints.
TWA Alarm
The time-weighted average (TWA) is a safety measure used to calculate
accumulated averages of gases. Using the US Occupational Safety and
Health Administration (OSHA) method or the American Conference of
Governmental Hygienists (ACGIH) method, an average is calculated to
ensure the detector alarms when the TWA has accumulated.
OSHA:
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.
ACGIH:
The ACGIH method is defined as the infinite (total) accumulated
average, whether it is 2 hours or 8 hours.
for sample factory
alarm setpoints.
2. Enter the TWA alarm setpoint for the H
2
S and CO sensor in the
TWA Alarm (ppm)
field (not applicable to O
2
and LEL sen-
sors).
