28
Setting the calibration offset function
This function can be activated when the controller is in the condition of accepting the MODE key.
EX.
Bring the oven to the target set temperature 100
℃
and allow it to reach the steady state.
After then, measure the temperature at a point in the chamber. If it shows 97
℃
when the
main display shows 100
℃
, you can conform your measuring value to the one on the
display by using calibration offset function.
Calibration
offset
△
D
b
is obtained from the Equation 1 (page27) as shown below.
△
D
b
：
97
℃－
100
℃
=
-
3
℃
procedures to set the calibration offset
△
D
b
to the controller are shown as below.
Procedure and Display
Explanation
→
Push the MODE key
Push the
▲
or
▼
key
↓
z
Push the Mode key, and then push the
▲
key or
the
▼
key several times to display “cAL” on the
main display. The sub display shows the
calibration offset value that has been set the last
time. In this examples, the calibration offset is
shown for 0.
※
When the unit is shipped from the factory, the
sub-display shows 0 as the calibration offset
value.
Push the ENTER key
z
If you change the calibration offset, push the
ENTER key when the main display shows “cAL”.
Then the sub display shows “cAL”, and the main
display flashes the present calibration offset
value.
Push the
▲
key or
▼
key
z
push either the
▲
key or the
▼
key to change
the value on the main display to your desired
value (calibration offset value to be set newly).
In this example, the main display shoes-3.
Push the ENTER key
z
When the changing is completed, push the ENTER
key.
z
The changed value is entered and both the main
and the sub displays return to the display mode just
before pushing MODE key. The controller starts the
temperature controlling operation in order to make
the difference zero, since the difference is
generated between the target set temperature and
the temperature in the chamber by the changing of
the calibration offset value.
