Operation of Controller
880 Operation Manual Issue 7 EMC INDUSTRIAL GROUP LTD Page 9 of 25
Set Vent Open Set Point
The Vent Open Set Point value is only shown in the display if relay option card OP-
1 is fitted.
Press and release MENU key until the small display shows .
The large display shows either the open vent set point or and the VENT light
will be flashing.
If the kiln temperature falls below the open vent set point after the firing is com-
pleted, the Vent light will turn on and the vent will open.
The vent limits do not operate when the setting is set to .
Use UP or DOWN keys to set the required open vent temperature value, which
must be between the setting limits, see Hold Temperature Setting Limits, page
23, or set to by holding down the UP key until display shows .
Alternatively, pressing the UP and DOWN keys together will cycle between half the
Maximum Hold Temperature, see Hold Temperature Setting Limits, page 23,
and the setting .
Press EXIT key to return to normal operation.
Start a Firing
Before starting a firing, either select one of the nine programs if they have been
previously entered or enter a new program as detailed in Enter a Program, page
7.
To view the total firing duration of this program press the TIME TO GO key, before
starting the firing.
There are three ways the firing can be started.
Instant Start Starts from the beginning of a program.
Delayed Start Starts automatically after a time delay.
Stage Start Starts from any stage of the program.
Each section is described in detail below.
Note When the firing has started, the HEAT light will turn on and off at dif-
ferent times to regulate the kiln temperature.
If the kiln temperature is too low the HEAT light will turn on. This indi-
cates power has been applied to the kiln's heating elements to in-
crease the temperature.
If the kiln temperature is too high the heat light will turn off. This indi-
cates power has been cut off to the kiln’s heating elements to allow
the temperature to fall.
Instant Start
This is the simplest way of starting the firing.
Press the RUN STOP key.
The small display shows and the RUN STOP light fast flashes for five seconds.
When the RUN STOP light stops flashing the small display will show the first ramp
number, the heat light will turn on, and the firing will start.
Delayed Start
A delayed start allows a firing to be started after a delay of up to 99 hours and 59
minutes from when the START/STOP key was pressed.
Press the RUN STOP key.
The small display shows and the RUN STOP light fast flashes for five seconds.
During the five seconds set the large display to the delay start time required.
At the end of the five seconds the small display comes on steady and the RUN
STOP light slow flashes to indicate there is a delayed start in progress.
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