Ventis LS Product Manual
12
© Industrial Scientific Corporation
TWA Alarm Screen
A flashing gas concentration value* indicates which sensor(s) reading(s) is
the cause for alarm. The low level alarms turn on and the TWA icon
flashes.
A TWA alarm occurs when the
calculated time weighted average
reaches the monitor’s hazardous value
for the set time frame.
STEL Alarm Screen
A flashing gas concentration value* indicates which sensor(s) reading(s) is
the cause for alarm. The low level alarms turn on and the STEL icon
flashes.
The STEL alarm occurs when the short
term exposure value exceeds the
acceptable limit.
No Sensor Installed Screen
The system level alarms turn on and the error icon displays.
Alarm occurs when the monitor
registers no sensors installed.
Sensor Data Fail Screen
A flashing “F” indicates which sensor is the cause for alarm. The audio
alarm turns on and the error icon displays.
Alarm occurs when any installed
sensor’s data-related operations fail
and the sensor is not operational.
Motion 1 Alarm Screen
The panic-motion alarm signals turn on.
The Motion 1 alarm occurs when the
instrument has not moved for 1 minute
(default setting; subject to change). To
turn off the alarm, the user can move
the monitor or press the ENTER
button.
Motion 2 Alarm Screen
The panic-motion alarm signals turn on.
The Motion 2 alarm occurs when the
Motion 1 alarm has not been cleared.
The user can clear the Motion 2 alarm
by pressing the ENTER button for one
second.
