Page
ST312A
User
Handbook
4
Contents
Contents
At A Glance.................................................. 2
Quick Start Guide......................................... 3
Contents........................................................ 4
Features ........................................................ 4
Turning On ................................................... 5
Programming................................................ 6
Firing ............................................................ 9
Cooling ....................................................... 13
Adjusting While Firing............................... 14
Error Messages ........................................... 16
Other Features ............................................ 18
Sample Programs........................................ 19
•
Single program
•
2 controlled heating / cooling ramps + soak
•
Soak time up to 99 hours 59 mins
•
Ramp rates from 1 to 999°C/hour + full
•
Suitable for ceramics and glass use
•
Program can be altered while firing
•
Program pause/un-pause + segment advance facilities
•
Keyboard lockable
•
Delayed start facility - up to 99 hours 59 mins
•
Power failure recovery
•
Energy used display
•
Alarm buzzer & alarm output
Featur
es
Features
ST312A User Handbook
Page 17
These error messages cause the ST312A to terminate the firing with all the
keys locked.
An alarm buzzer sounds once per second.
SWITCH KILN OFF!
To reset the ST312A turn off the power to the instrument and have the
fault investigated by your installer or kiln service engineer to rectify the
fault.
Technical note: any error message will cause the auxiliary alarm relay
(if fitted) to open - see installation handbook for details.
Note: these error messages are provided to detect kiln faults and so offer
some protection to the kiln. For increased protection the use of a heat fuse
or other independent over-temperature trip is recommended - such as the
Stafford Instruments ST121.
Error 7. Maximum room temperature
exceeded. The internal temperature of the
ST312A has exceeded an installer
selectable (30 - 70°C) limit.
Err7
°C
°C/hr
hr.min
Possible causes are: room vent fan failure, ventilation grills blocked, kiln room
too small, damper or bung left open
