Operation of Controller
880 Operation Manual Issue 7 EMC INDUSTRIAL GROUP LTD Page 12 of 25
• When firing and small display shows … press to show how much time re-
mains to the end of the current ramp.
• When firing and small display shows … press to show how much time re-
mains to the end of the current hold period.
• When firing and small display shows … pressing this key will show in
the large display.
… indicates the Control Temperature has reached the set temperature and
the kiln temperature is lagging behind because there is not enough power go-
ing in to the kiln to keep its temperature up with the ramp rate setting.
Alarm Cancel (Exit) Key
This key performs two functions, alarm cancel and exit programming.
• When an alarm has occurred press to acknowledge the alarm and mute the
internal beeper and display the alarm number. See Alarm List, page 15 for
alarm numbers.
• Press to return to normal operation after programming.
Indicator Lights
Heat Light
Turns on when heat is being applied to the kiln.
Vent Light
Turns on when kiln is venting. The Vent output is available only if option OP-1 relay
card has been fitted. If the Close Vent and Open Vent settings are both set
to , see Set Vent, page 8, the vent light will remain off.
Run Stop Light
Turns on when controller is running a program. If the controller has been set for a
delayed start, the Run Stop light will flash slowly during the delay countdown.
Menu Light
Turns on when controller is in programming mode and indicates keys marked with
blue captions are used to select and change settings.
Alarm Light
The Alarm light flashes’ indicating the controller has detected a problem. When the
ALARM CANCEL key is pressed, the internal beeper is muted, and, if the problem
is still present, the Alarm light becomes steady, or goes off if the problem has
gone.
°C/h Ramp Light
Turns on when large display is showing a ramp rate.
°C Temp Light
Turns on when large display is showing a temperature.
h.m Hold Light
Turns on when large display is showing time in hours and minutes.
Display
Both Displays
• After a power failure both displays flash indicating firing has not resumed. See
Firing Does Not Resume When Power Returns, page 14.
Large Display
• In normal operation it shows the kiln temperature.
• When programming, it shows the value of the selected setting.
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