Operator`s manual

6
RAMP RATES (R) (0 - 40°C/minute)
1. Pressing the Rate
R
key display's the current value of the R1 parameter followed by 3 blanks for a new
value.
• For example: R1 8.0°C/M ->_ _ _
• The corresponding LED will also light to indicate the selected stage and parameter.
2. Use the digit keys (0,1,2,...,9) to enter the desired parameter value followed by the ENTER key. The
new parameter is now stored in memory.
• If a value is entered that is out of the acceptable range, the furnace will beep and display the acceptable
range.
• Programming a Rate to 0 will cause the furnace to terminate the remainder of the program stages. For
example, if R2 is set to 0 then at the end of the first hold time (H1) the furnace will end the program,
making the program a single stage.
3. Pressing the Rate
R
key additional times gives access to the Rate parameters for the other two stages.
The 4th time the key is pressed the display circulates back to the beginning and the R1 parameter will be
displayed again.
• The Rate
R
key operates the same if pressed during the operation of a program with the following
exception. The new Rate entered is used only for that one program or cycle and not stored in memory.
• Negative ramp rates are also possible if slower than natural cooling.
TEMPERATURES (T) (50 - 1100°C or Tmax)
1. Pressing the Temp
T
key makes the display show the current value of the T1 parameter followed by 4
blanks for a new value.
• For example: T1 160°C ->_ _ _ _
• The corresponding LED will also light to indicate the selected stage and parameter.
2. Use the digit keys (0,1,2,...,9) to enter the desired parameter value followed by the ENTER key. The
new parameter is now stored in memory.
• If a value is entered that is out of the acceptable range the furnace will beep and display the acceptable
range.
3. Pressing the Temp
T
key additional times will display and give access to the Temp parameters for the
other two stages. The 4th time the key is pressed the display circulates back to the beginning and the T1
parameter will be displayed again.
• The Temp
T
key operates the same if pressed during the operation of a program with the following
exception. Any new parameter entered is used only for that one program or cycle and not stored in
memory.
HOLD TIMES (H) (0 - 99:59 mm:ss)
1. Pressing the Hold
H
key display's the current value of the H1 parameter followed by 4 blanks for a new
value.
• For example: H1 1:00H ->_ _ : _ _ (1 hours and 00 minutes)
• The corresponding LED will also light to indicate the selected stage and parameter.
2. Use the digit keys (0,1,2,...,9) to enter the desired parameter value up to 99 minutes and 59 seconds
followed by the ENTER key. The new parameter is now stored in memory.
3. Pressing the Hold
H
key additional times gives access to the Hold parameters for the other two stages.
The 4th time the key is pressed the display circulates back to the beginning and the H1 parameter will be
displayed again.
• The Hold
H
key operates the same if pressed during the operation of a program with the following
exception. Any new parameter entered is used only for that one program or cycle and not stored in
memory.
AIR EXCHANGE OPERATION
1. The air exchange operation is accomplished by using the venturi principle to draw air out of the muffle and into
an exhaust air flow. The hot muffle air does not pass through the fan. Make up air for the muffle is introduced
behind the muffle heating plates. This indirect air path causes the make up air to preheat before it reaches
the muffle cavity to assure temperature uniformity.
A