troxlerlabs.com: NTO FAQs

•	Why is my NTO is not heating up?
•	Why is my NTO smoking?
•	Why am I getting unburned material in my sample trays?
•	Why am I experiencing a high aggregate loss in my samples?
•	During the burn process the scale shows erratic readings?

* For additional information, refer to the troubleshooting section of the NTO Operator's Manual.

Why is my NTO is not heating up?
Ensure that the door latch is making good contact with the door interlock switch. Adjust the door latch if needed.

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Why is my NTO smoking?
Inspect and clean the easy access side plenum of the NTO (refer to instructions in the manual). Check the exhaust system and ensure it is clean and there is nothing restricting the airflow, such as a mesh screen. Ensure that the exhaust duct is 4" in diameter and not 3" duct, which will slow the airflow considerably. Try to eliminate any 90-degree elbows in the exhaust duct that can slow the airflow considerably. Inspect and verify that the NTO fan is turning.

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Why am I getting unburned material in my sample trays?

•	Ensure that you have evenly spread the sample in the sample trays.
•	Ensure the NTO is preheated properly before using. Recommended preheat temperature for 4730 (120V unit) is 400C and for 4731 (240V unit), 370C.
•	Ensure that the auto-control cut off is set at 0.01%.
•	Change the burn profile from Default to Option 2 (more aggressive burn profile).
•	Ensure the exhaust system is operating properly.

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Why am I experiencing a high aggregate loss in my samples?
Verify the chamber temperature at the end of the burn. It should be below 400C. If higher, inspect and clean the NTO and the exhaust system. Change the burn profile from Default to Option 1 (less aggressive burn profile).

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During the burn process the scale shows erratic readings?
Ensure that the basket assembly is centered in the furnace and not touching one of the sides.

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