After calibration, read all messages on the LCD display and correct any
errors. Change the sensor immediately if the following messages occur:
• "SENSOR WARNING"
• "REPLACE SENSOR".
Refer to the "Limitations Associated with Toxic Gas and Combustible
Gas Monitoring" section later in this chapter.
Periodic Sensor Replacement for
Oxygen, Toxic, and Catalytic Combustible sensors
These sensors have a limited lifetime and must be replaced periodically
to ensure proper operation. Unless historical calibration records show
that sensors consistently last longer:
• replace oxygen and toxic sensors once per year
• replace catalytic combustible sensors every 18 months.
Due to environmental conditions, these sensors may require
replacement more or less frequently. If supported by calibration records:
• toxic sensors can be replaced as infrequently as every two years
• combustible sensors can be replaced as infrequently as every
three years.
• Do not exceed this replacement schedule.
Immediately replace sensors if the "SENSOR WARNING" or "REPLACE
SENSOR" messages occur after calibration.
Cleaning Monitor Windows on the XIR Sensor
NOTE: This does not apply to sensors other than the XIR sensor.
If the monitor windows on this sensor are dirty, the sensor may produce
erroneous readings. Whereas diagnostics detect this condition, the user
should also perform a periodic visual inspection of the windows. The
window is easily inspected after removing the environmental guard.
Frequency of required inspection is environmentally dependent.
In typical environments, windows never require cleaning due to the:
• environmental guard protection
• heating elements that prevent water condensation.
2-6
To Next Page
Loading...
Need help?
General
