Operator`s manual

13
TEMPERATURE ADJUSTMENT/CALIBRATION:
Every VULCAN furnace is calibrated in the factory at 1000°C. Under normal use the furnace should not require
calibration. The electronics used in the VULCAN furnaces are very stable and will have minimal drifts over the
life of the furnace. Thermocouple replacement could be a potential requirement for calibration if high accuracy is
required.
This calibration can be altered by entering a new Tcal value in the Setup mode listed previously. The Tcal value
has a range of 900 to 1100°C.
For example:
A program is operating at a stable temperature and a separate thermocouple is inserted in the furnace and a digital
thermometer measures the muffle temperature. The display shows 875°C which is the programmed temperature
but the digital thermometer reads 868°C. A new calibration value could be calculated by dividing the display
temperature by the actual temperature (digital thermometer) and then multiplying by the current Tcal value (factory
default is 1000°C). In this case the result is 1008 (875/868 = 1.008; 1.008 * 1000 = 1008). 1008 is entered in as
the Tcal value. With this method the furnace calibration can be done at the normal operation temperature.
Second example:
Programmed temperature is 1050°C and the digital thermometer reads 1065°C. The old Tcal value is 985°C.
(1050/1065 = 0.986 then 0.986 * 985 = 971)
971 should be entered as the new Tcal value.
CLEANING:
• Vacuum dust and dirt from the furnace rather than attempting to blow the dust off. This will minimize the amount
of air born particles.
• Use a soft damp cloth to clean the control panel. Avoid excess water or solution when cleaning the furnace. These
solutions can attack the panel or electronics and cause the furnace to malfunction.