Alarms - Industrial Scientific Ventis LS Product Manual

Alarms

NOTICE
→ All monitor alarms and warnings should be taken seriously and responded to as stated in company safety
standards.
It is practical for the monitor user to be aware of the possible alarms prior to monitor set-up and use. The Ventis LS
has multiple alarm and warning signals. A "system level" alarm generates the highest frequency tone and highest
level visual and vibration signals. It is used to indicate such events as a sensor failure. Compared to the system
alarm, gas alarms are of lower intensity, and a quick repetitive burst of signals is used to indicate a panic or motion
alarm. The lowest level indicator is a warning with low-level beep patterns to indicate service needs (e.g., low battery
or calibration due). The beep is also used as a confidence indicator when enabled.
Alarm types and their alarm generating conditions are described below.
Display
Over-range Alarm Screen
The "Or" message indicates which sensor(s) is reading an over-range
condition(s). All other sensors show their current gas concentration
readings on a numeric display (left) or gas names on a text display (right).
The high level alarms turn on and the alarm icon displays.
Negative Over-range Alarm Screen
The "-Or" message indicates which sensor is reading a negative over-
range condition. All other sensors display their current gas concentration
readings*. The high level alarms turn on and the alarm icon displays.
High Alarm Screen
A flashing gas concentration value* indicates which sensor(s) reading(s) is
the cause for alarm. The high level alarms turn on and the up arrow icon
displays.
Low 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 down arrow icon
displays.
Ventis LS Product Manual
Description
An over-range condition occurs when
the gas concentration value sensed is
above the sensor's measuring range.
After any over-range alarm, the
monitor should be calibrated.
NOTE: The O and toxic sensor values normally
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reset when the gas sensed reaches an acceptable
range. If the LEL sensor reads over-range, the
alarm "latches" or remains on until the monitor is
powered-off.
A negative over-range condition occurs
when the gas concentration value
sensed is less than the sensor's
measuring range.
After any negative over-range alarm,
the monitor should be calibrated.
A high alarm condition occurs when
the concentration of gas sensed
reaches a level greater than the
monitor's high alarm value setting for a
sensor(s).
A low alarm condition occurs when the
concentration of gas sensed reaches
the monitor's low alarm value setting
for a sensor(s).
© Industrial Scientific Corporation
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