Page
ST325 User Handbook
10
T
e
mperature Disp
aly
Temperature Display
1020
°C
°C/hr
hr.min
For multi-zone kilns the temperature of
each zone can be displayed. Zone 1 is
displayed by default when the ST325 is
powered on.
Ch 1
°C
°C/hr
hr.min
To check which zone / channel is currently
displayed press the
©
or
ª
keys. The
zone temperature will be displayed again
after 5 seconds or if the
¨
or
§
keys are
pressed.
Ch 2
°C
°C/hr
hr.min
To change the displayed zone / channel
press either the
©
or
ª
keys again.
Ch 1
&
Ch 2
will be shown for 2-zone kilns and
Ch 3
will be shown for 3-zone kilns.
1023
°C
°C/hr
hr.min
To display the zone temperature either
wait 5 seconds or press the
¨
or
§
keys.
This section only applies to multi-zone (2 or 3 zones) kilns. A single zone
kiln will always show the temperature of zone 1 only.
ST325 User Handbook
Page
15
If the ST325 is programmed to heat the kiln at a faster rate than the kiln is
capable of then the ST325 will turn on full power then wait until the kiln
temperature has risen to the correct temperature before proceeding to the
next ramp or soak segment.
Likewise if the ST325 is programmed to cool the kiln at a faster rate than
the kiln is capable of then the ST325 will apply zero power then wait until
the kiln has cooled to the correct temperature before proceeding to the
next ramp or soak segment.
Kiln too slow
Heating & Cooling Ramps
The ST325 is capable of controlled ramps for both heating and cooling.
The type of ramp required is determined by comparing the required soak
temperature to the soak temperature in the previous segment and is shown
on the mimic display.
STOP key operation
If the START/STOP key is pressed during a firing then the firing will be
halted (not paused). Pressing the START/STOP key again will cause the
ST325 to restart the firing from the beginning. The ST325 will look at the
current kiln temperature and if this is greater than the required soak tem-
perature then the ST325 will automatically
cool
from current temperature to
the soak temperature. This may not be what is desired so the STOP key
should only be used to halt the firing in an emergency.
The program can be paused or program data can be changed while the
controller is firing (see page 14). This is a better option than using the
STOP key. The segment advance feature (see page 16) is however avail-
able to recover quickly from STOP key operation if required.
Memory
All programs & necessary data are remembered when the ST325 is turned
off. In the event of power failure during firing the ST325 will automatically
resume firing when power is returned (this feature can be disabled: see
installation handbook).
Operating Notes
Delayed Start
The delayed start time period is by default set to
00
.
00
when the ST325 is
turned on. This zeroing feature can be changed to allow a previously en-
tered delayed start time to be remembered: see installation handbook.
Operating Notes
