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Shelf location
1. The side walls of the chamber contain twenty four holes (.250 inch dia.) which allow adjustment
of the two perforated shelves at various heights within the chamber.
2. Using the eight, .250 inch diam. porcelain pegs, insert four pegs in the bottom row of holes.
3. Next insert the remaining four pegs in fourth row of holes and insert the two perforated shelves .
4. Check for proper fit at this point by inserting the crucible trays.
Operation
1. Insert crucible trays. One tray per shelf.
2. Close the furnace door.
3. Insure the exhaust system is operating.
4. Set flow control valve so flow indicator reads between 40 and 45 liters per minute. (Check
regulator to insure 20 psi pressure).
5. Switch power switch to "ON".
6. Depress run button. Controller will automatically step the program through the various steps
outlined earlier.
7. When the program has ended, the controller will maintain the chamber temperature at a value
equal to the last programmed level (PL) until the program is cancelled. It will not automatically
cool to ambient unless last programmed level (PL) is set at ambient. When a program is
cancelled the controller will maintain the chamber temperature at a value equal to the main
setpoint (SP1 or SP). To cancel a program depress and release the "UP" and "DOWN"
pushbuttons simultaneously. Be sure single set point mode is set to 20 degrees as described
earlier in this manual.
8. At the end of the program, turn the flow control valve fully clockwise to the closed position.
Furnace Loading
For best results, use only the center two-thirds of the furnace chamber.
CAUTION
Do not overload your furnace chamber. If the load is to be heated uniformly, it should not
occupy more than two-thirds of the furnace chamber. Failure to observe this caution
could result in damage to furnace components.
1. If you are heating a number of small parts, spread them throughout the center of the
furnace chamber.
2. Keep objects away from thermocouple.
3. Use insulated tongs and mittens when loading and unloading furnace.
4. Always wear safety glasses.
5. Use Thermolyne hearth plates if you place load on bottom of chamber. Part #PHX2
(three are required).
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