Sensor Alarms - Thermo Scientific INNOVA Series Instruction Manual

2. You must replace the alkaline or recharge the NiCd batteries within
your monitor before putting it back into operation, see Chapter 6,
Maintenance, for procedures to replace or recharge your batteries.
WARNING
Always replace or recharge batteries in a "fresh air" environment
(environment known to be free of combustible and toxic gases and
of normal oxygen content).

Sensor Alarms

This section describes alarm indications, display messages, and response to
sensor failure alarms. The backlight automatically turns on during all failure
alarms.
Sensor Alarm Indications
Table 3-3 lists the indications for each type of failure alarm.
Table 3-3 Alarm Indications (Failure Alarms)
Alarm Display
Sensor Failure XXX
Responding to Sensor Alarms
A sensor failure alarm can occur during normal operation or calibration.
Alarms that occur during calibration are described in Chapter 5, Calibration.
1. Examine the display screen to determine which sensor is failing. The
failing sensor displays "XXX" instead of the gas reading for a sensor
that has failed an air adjust, Calibration, or gas missing sensor.
2. Perform an air adjust, if the sensor(s) continues to fail, perform a
calibration, see Chapter 5, Calibration.
3. If the sensor(s) continue to fail, replace the sensor(s), see Chapter 6,
Replacing Sensors.
4. You can enter the Innova user program and change the sensor status
setting to "OFF". All information for an absent sensor is removed
from the normal screen and recorded as XXX in the datalog.
WARNING
The Innova does not display gas readings, initiate alarms, compute
averages, or store data for "OFF" sensor(s).
71-6417
Light/Buzzer
Continuous
Alarms
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