Fyrite
InTech
Manual Troubleshooting
0024-9486 Rev 2 59
Section 6. Troubleshooting
6.1. Error and Warning Messages
Message Description
T-STK
The probe thermocouple is not connected to the analyzers
T-Stack connector. Plug the probe thermocouple plug into the
T-Stack connector at the bottom of the instrument.
Check Sensor
O
2
O
2
sensor output is low, but still usable. Sensor may need to be
replaced in the near future. The arrow on the O
2
Sensor Life
screen is in the “replace” segment.
Replace Sensor
O
2
O
2
sensor output is low and should be replaced. The arrow on
the O
2
Sensor Life screen is beyond the bar graph (typically 2
years for the O
2
sensor).
Bad Sensor O
2
O
2
sensor output is too low and is not usable, or sensor is missing.
Low Sensor CO CO sensor output was low but still usable. Sensor may need to be
replaced in the near future.
Low Battery Battery voltage is low. Replace the batteries.
Applied Value
High/Low
An attempt was made to calibrate a sensor outside its range—
either above (High) or below (Low) the acceptable range.
Warm-up
Sensor Error
• CO sensor was not zeroed at warm-up because of high output.
Run instrument on fresh air then restart instrument to re-zero
sensor. If the message persists, the CO sensor may need to be
replaced.
• Stack or Air temperature sensors are measuring temperature
outside the range of -4° to 212° F at warm-up. Make sure
that the Stack and Air thermocouples are sampling ambient
room air within the temperature range at warm-up.
• The Fyrite
InTech
was turned on with the probe sampling
flue gas. Move the probe to fresh air and restart the
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