23
Problem
Possible Causes
Corrective Action
Repeated element burnout.
Overheating furnace.
Keep furnace under maximum
temperature. Closer supervision
of control setting.
Control malfunction.
Replace control.
Incorrect element.
Install proper element.
Oxidized thermocouple leading
Replace thermocouple.
to inaccurate reading.
Wired improperly.
Check wiring diagram for correct
wiring of your furnace.
Inaccurate temperature readout.
Oxidized or contaminated
Replace thermocouple.
thermocouple.
Poor thermocouple connection.
Tighten connections.
Improper loading procedures.
Use proper loading procedures.
Poor ventilation of base.
Clear area around furnace base.
Thermocouple connections
Reconnect thermocouple
reversed.
correctly.
*Static charge on pyrometer case.
Dispel static charge by
breathing on cover,
treat for static charge.
Control out of calibration.
Contact Barnstead International
P.I.D. values invalid.
Re-tune control.
Control malfunction.
Verify and correct all parameter
and configuration values.
If “malfunction” persists,
replace control.
*Applies to the manual temperature control models.
T
ROUBLESHOOTING
