20
Adjusting Cone Offset and Thermocouple (T/C) Offset.
CONE Offset
CNOS
T/C Offset
TCOS
To Correct Under-firing
Set positive (00) cone
offset
Set negative (90) t/c offset
To Correct Over-firing
Set negative (90) cone
offset
Set positive (00) t/c offset
CNOS (Cone Offset)
- Used to raise or lower the final cone temperature. The final cone temperature can be
raised or lowered a maximum of 50
o
F (28
o
C).
When entering the offset temperature the following convention is used: the left two digits designate whether to
raise (00) or lower (90) the cone temperature, that is, “00” means plus (+) and “90” means minus (-). The right
two digits are the number of degrees the cone temperature will be raised or lowered.
Examples:
Number
Meaning
0020
Raise the final cone temperature by 20
o
F increases heat work
0040
Raise the final cone temperature by 40
o
F increases heat work
0015
Raise the final cone temperature by 15
o
F increases heat work
9030
Lower the final cone temperature by 30
o
F decreases heat work
9005
Lower the final cone temperature by 5
o
F decreases heat work
9045
Lower the final cone temperature by 45
o
F decreases heat work
The following apply to cone offsets:
The final temperature is affected only for the cone number that you change and no other cone numbers.
The cone offset will remain for that specific cone number until it is changed again.
Typing just the offset amount will raise the final temperature and INCREASE the amount of heat work.
Typing “90” before the desired offset amount will lower the final temperature and DECREASE the amount of
heat work.
The maximum number of degrees that can be raised or lowered is 50
o
F (28
o
C)
Cone offsets do not affect the VARY-FIRE mode.
Cone Offset Example: Adjust cone 6 to shut off the kiln at 30
o
F below the prescribed cone temperature.
Step
Press
Display
Comment
1
Menu,
Menu
CNOS
If CNOS does not show on the display, press the Menu key until CNOS
displays.
2
ENTER
Alternately flashing:
ConE & #
Cone Offset has been selected; the word CONE and the last entered cone
number will alternately flash on the display. Now enter the cone number which
you want to adjust (in this example cone 6)
3
6
6
“6” will be displayed. If you type a wrong number, press zero 3 times, press
ENTER, then type the correct number.
4
ENTER
Alternately flashing:
o
F0S & number
o
FOS and the previous offset alternately flash. Enter the new offset amount
using the rules above, in this example, “9030”.
5
9, 0, 3, 0
9030
The selected offset temperature is displayed. If you type a wrong number, press
zero 4 times, then type the correct number.
6
ENTER
The display returns to
IdLE
The temperature adjustment has been accepted. The current temperature then
flashes in the display. A cone 6 program will now fire 30
o
cooler.
