Operator`s manual

12
SETUP:
The Vulcan furnace goes through a self test that lasts approx. 6 seconds each time power is applied. After this test,
the display will show the word "Setup?" for approximately 5 seconds. In the Setup mode, several different options are
available for the user to select.
The first is the END OF PROGRAM operation which allows the user to select how the furnace should operate at the end
of the program. The second is the Tmax parameter, a temperature alarm that can be programmed into the furnace.
The last is TEMPERATURE ADJUSTMENT CALIBRATION (Tcal) which allows the user to alter the furnace temperature
calibration.
1) Turn on power to the furnace. Press the ENTER key after the word "Setup?" is displayed and access to
the Setup mode is gained.
The END OF PROGRAM option is now displayed as "Hold = (1), (2),(3)". The (1) option is the factory default.
It instructs the furnace to control the last programmed temperature, display "Hold" and beep every 3 seconds
until the red Stop
S
key is pressed. Pressing the Escape
ESC
key will only stop the beeping.
The (2) option instructs the furnace to control the last programmed temperature, and display "Hold" but without
beeping until the red Stop
S
key is pressed.
The (3) option instructs the furnace to turn the control off and let the muffle cool to room temperature. The
display shows "End". The Stop key does not have to be pressed.
Use the digit keys (1,2,3) to change the END OF PROGRAM option.
2) Pressing the ENTER key when the desired END OF PROGRAM is selected will store the entry into
memory and then advance to Tmax the next option. The Tmax value limits the maximum temperatures that
the furnace may be programmed to. The factory setting for Tmax is 1100°C. Use the digit keys (0,1,2,...,9) to
enter the desired Tmax value followed by the ENTER key. The new Maximum Temperature is now
stored in memory and the next option is displayed.
3) The final option is the temperature adjustment calibration displayed as "Tcal 1000°C->_ _:_ _". The factory
setting for Tcal is 1000°C. Use the digit keys (0,1,2,...,9) to enter the desired Tcal value followed by the
ENTER key. The new Temperature Calibration is now stored in memory. Entering a 1000 will return
the furnace to the factory calibration. See the next section on Temperature Adjustment Calibration for
specifics on how to determine a new adjustment number.
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.
Example 1:
A program is operating at a steady temperature of 875°C and a separate thermocouple is inserted in the furnace
and a digital thermometer is used to measure the muffle temperature. The display shows 875°C (the programmed
temperature) but the digital thermometer reads 868°C. A new calibration value is calculated by dividing the
displayed temperature (furnace) by the measured temperature (digital thermometer), the result is multiplied by the
current Tcal value (factory default is 1000°C). In this case (875/868 = 1.008; 1.008 * 1000 = 1008). 1008 is now
entered in as the Tcal value. With this method a furnace calibration can be done at any operating temperature.
Example 2:
Programmed temperature is 1050°C and the digital thermometer reads 1065°C. The previous 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.
SETUP & MAINTENANCE