Page
ST312A
User
Handbook
14
Adjusting While Firing
Firing values can be adjusted while the ST312A is firing. Also there are
program pause/un-pause and segment advance features that are particulary
useful for glass work.
Adjusting Firing Values
While firing operate the
¨
key to select the required parameter as shown by
a flashing lamp on the mimic display. The firing value is shown on the main
display and can now be adjusted with the
©
&
ª
keys in the usual way.
Firing will still carry on as normal while these changes are being made. The
ST312A will return to its normal running display 10 seconds after key
presses cease (or immediately after
End
is displayed).
Changes made to the program in this way are stored and are used for
subsequent firings.
Segment Advance Facility
While firing press and hold down the
©
key for about 4 seconds. The
ST312A will sound a short beep and the executing program will immedi-
ately advance one step as indicated by lamps on the mimic panel. The
effect of this is as follows:-
If a start delay is currently executing then the ST312A will terminate this
and start firing immediately.
If ramp 1 segment is currently executing then the ST312A will switch to
ramp 2 using ramp rate 2 from the current kiln temperature.
If ramp 2 segment is currently executing then the ST312A will switch to
soak at the current kiln temperature.
If currently soaking then the ST312A will end the firing.
Changes made to the operation of the ST312A in this way are temporary
and are not stored.
Adjusting While
Firing
ST312A User Handbook
Page 7
When the ST312A is not firing there are no lamps lit on the mimic panel,
the run lamp is off and the display shows the kiln temperature with the °C
indicator lit.
Altering the program
.
20
°C
°C/hr
hr.min
If the left-hand decimal point is on
then the keyboard is locked. Press
the
©
&
ª
keys together & hold
down for 5 seconds to unlock.
The controller settings can be reviewed by pressing the
¨
key.
Note: holding down the
©
or
ª
keys causes rapid change of the displayed
value.
00
.
00
°C
°C/hr
hr.min
The first push of the
¨
key displays
the start delay time in the range 00.00
to 99.59 (99 hours 59 mins). This
can be altered with the
©
&
ª
keys.
The DELAYED START lamp on the
mimic display will flash.
50
°C
°C/hr
hr.min
¨
then displays ramp rate 1 in the
range 1 to 999°C/hr or
FULL
or
End
.
This can be altered with the
©
&
ª
keys. RAMP 1 lamp on the mimic
display will flash.
600
°C
°C/hr
hr.min
¨
then displays temperature t1 in the
range 0 to 1320°C. This can be
altered with the
©
&
ª
keys. The t1
lamp on the mimic display will flash.
250
°C
°C/hr
hr.min
¨
then displays ramp rate 2 in the
range 1 to 999°C/hr or
FULL
or
End
.
This can be altered with the
©
&
ª
keys. The RAMP 2 lamp on the
mimic display will flash.
1250
°C
°C/hr
hr.min
¨
then displays the soak temperature
in the range 0 to 1320°C. This can be
altered with the
©
&
ª
keys. The
SOAK TEMPERATURE lamp on the
mimic display will flash.
Pr
ogramming
