Even high-quality instruments like tube furnaces can encounter minor issues during use, which may affect experiments or results. Here’s a guide to four common tube furnace problems and how to solve them:
1. Power on but indicator light doesn’t turn on
Cause: The fuse may have blown.
Solution: Replace the fuse.
2. Temperature decreases instead of increasing during heating
Cause: The thermocouple polarity is reversed.
Solution: Swap the positive and negative connections of the thermocouple.
3. Ammeter shows no current but voltmeter shows voltage
Cause: One or more heating elements are broken.
Solution: Open the furnace door, inspect the heating elements, and replace only the broken one(s). Full replacement is unnecessary.
4. Power supply appears normal but furnace doesn’t operate
Cause: Furnace parameters are incorrect.
Solution: Contact the manufacturer. They can guide you remotely (e.g., via video call) to reset the parameters correctly.
If these issues cannot be solved independently, you can contact Baoji Dingsheng Vacuum Thermal Technology for assistance. They provide support regardless of whether your furnace was purchased from them.