FyriteINSIGHTPlus Manual Troubleshooting0024-9487 Rev 2 96Section 6. Troubleshooting6.1. Error and Warning MessagesMessage DescriptionT-STKDisconnectedThe probe thermocouple is not connected to the analyzersT-Stack connector. Plug the probe thermocouple plug into theT-Stack connector at the bottom of the instrument.Check SensorO 2O 2 sensor output is low, but still usable. Sensor may need to bereplaced in the near future. The arrow on the O 2 Sensor Lifescreen is in the “replace” segment. Refer to page 56.Replace SensorO 2O 2 sensor output is low and should be replaced. The arrow onthe O 2 Sensor Life screen is beyond the bar graph (typically 2years for standard O 2 sensors and 3 years for long-life O 2sensors). Refer to page 56.Bad Sensor O 2 O 2 sensor output is too low and is not usable.Low Sensor CO CO sensor output was low but still usable. Sensor may need to bereplaced in the near future.Low Battery Battery voltage is low. Replace the batteries.Applied ValueHigh/LowAn attempt was made to calibrate a sensor outside its range—either above (High) or below (Low) the acceptable range.Warmup SensorError• CO sensor was not zeroed at warmup because of high output.Run instrument on fresh air then restart instrument to re-zerosensor. If the message persists, the CO sensor may need to bereplaced.• Stack or Air temperature sensors are measuring temperatureoutside the range of -4° to 212° F at warmup. Make sure thatthe Stack and Air thermocouples are sampling ambient roomair within the temperature range at warmup.• The Fyrite INSIGHT Plus was turned on with the probesampling flue gas. Move the probe to fresh air and restart theinstrument.• Messages will indicate which sensors are in error.www. GlobalTestSupply .comFind Quality Products Online at: sales@GlobalTestSupply.com