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ST216 User Handbook

 

Programming 

A firing program 

An ST216 firing program comprises of a ramp to an intermediate temperature 
t1 followed by another ramp to the soak temperature followed by a soak period. 
 
The ST216 ramps the kiln temperature at the required ramp rate 1 until the kiln 
reaches temperature t1.  It then ramps the kiln temperature to the soak temper-
ature where it dwells for the required soak period. 
 
Each ramp rate is independently settable in the range 1°/hour to 999°/hour or 
FULL (full power) or End (end of program). 
 
The soak / target temperature is settable over the range 0 to 1400°C (2552°F). 
 
The soak period is settable over the range 00.00 (no soak) to 99 hours 59 
mins. 
 
A program linking feature is available for complex firings.  This feature is disa-
bled by default but can be enabled by reference to the Installation Handbook. 
 

Only heating ramps are depicted on the mimic display but the ST216 is capa-

ble of both positive (heating) ramps and negative (cooling) ramps. 

Note: during soaking the ST216 display alternates every 15 seconds 

between kiln temperature and soak period remaining. 

Soak period lamp

Ramp 2 lamp

Ramp 1 lamp

Soak temperature lamp

t1 lamp

Summary of Contents for ST216

Page 1: ...Page 1 ST216 Temperature Programmer User Handbook Issue 2 00 Date 12 Dec 2016 See separate handbook for Installation Instructions Copyright 2014 2016 Stafford Instruments Ltd www staffordinstruments co uk TAFFOR S D ST216 ...

Page 2: ...216 User Handbook 2 At a Glance FUSE CONTROLKEYS START STOP KEY FIRING INDICATOR TEMPERATURE ICON RAMP RATE ICON TIME ICON KILN HEATING INDICATOR MIMIC DISPLAY MAIN DISPLAY PROGRAM DISPLAY POWER ON OFF SWITCH ...

Page 3: ... To review firing data press the key to enter the programming mode To change firing data press the keys to change the displayed value Use the key again as necessary to step to the next firing value to be reviewed or changed To exit the programming mode either wait 20 seconds or press the n key to start firing If the keyboard is locked then press the keys together hold down for 5 seconds to un lock...

Page 4: ...her Features 14 Sample Ceramics Programs 15 80 programs Program linking available Soak periods up to 99 hours 59 mins Ramp rates from 1 to 999 hour FULL Ideal for ceramics use Programs can be altered while firing Program pause and advance facilities Keyboard lockable Delayed start facility up to 99 hours 59 mins Power failure recovery Energy used display Setpoint display Alarm buzzer alarm output ...

Page 5: ...or N type r S H n The final display will show the kiln tempera ture All other lamps should be off If pressing any key causes LOC to appear then the keyboard has been locked This is an anti tamper feature Press the keys together hold down for 5 seconds to unlock During firing the right hand decimal point will light to show when heating power is being applied to the kiln This now shows that the keyb...

Page 6: ...999 hour or FULL full power or End end of program The soak target temperature is settable over the range 0 to 1400 C 2552 F The soak period is settable over the range 00 00 no soak to 99 hours 59 mins A program linking feature is available for complex firings This feature is disa bled by default but can be enabled by reference to the Installation Handbook Only heating ramps are depicted on the mim...

Page 7: ...tor on the mimic panel will flash Note 2 to exit programming without cycling through all of the above steps wait 20 seconds without pressing any keys the ST216 will revert to the idle display Alternatively press the n key to exit programming and to begin firing immediately Note 3 the key can be used to reverse through the programming steps to correct errors or to exit pro gramming mode Note 1 avai...

Page 8: ...tor will remain off Program Linking If linking to another program is required then select Lon Linking On with the keys The next push of the key will cause the program number display to be increased by 1 The display now prompts for ramp 1 data as shown below Continue entering program data as required Terminate the linked program sequence with LoFF Program linking is useful for complex firing such a...

Page 9: ...n lit To stop the firing prematurely at any time press the n key again The fir ing indicator lamp will go out Note during ramping to the soak temperature the ST216 will perform con trolled heating if t1 soak temperature and it will perform controlled cooling if t1 soak temperature During soaking the ST216 display alternates every 5 seconds between kiln temperature and soak period remaining Cooling...

Page 10: ...will be halted not paused Pressing the n key again will cause the ST216 to restart the firing from the beginning The ST216 will look at the current kiln temperature and if this is greater than t1 then the ST216 will automatically cool from the current temperature to t1 This may not be what is desired so the n key should only be used to halt the firing in an emergency The program can be paused or p...

Page 11: ... ST216 will return to its normal running display 20 seconds after key presses cease or immediately after End is displayed Changes made to programs in this way are stored and are used for subsequent firings Program Advance Facility While firing press and hold down the key for 3 seconds to obtain the 8 advance function The ST216 will sound a short beep and the executing pro gram will immediately adv...

Page 12: ... wiring checked Replace thermocouple if necessary Thermocouple reversed kiln temperature appar ently less than 40 C This is an installation fault Get wiring checked Cooling error The kiln has been on zero power for 30 minutes but the kiln temperature has not fallen by at least 1 C Possible causes contactor failure contacts welded or thermocouple connection intermittent or high resistance Kiln temp...

Page 13: ...ent fan failure kiln room too small ventilation grills blocked damper or bung left open controller mounted too close to kiln Program Error This error message is displayed if a potential error is detected within the firing program when the n key is pressed to start a firing The alarm buzzer will sound 3 times and the PROGRAM display with flash with either the current program number or the number of...

Page 14: ... is an anti tamper feature used to ensure that the operation of the ST216 or the program data cannot be altered by un authorised people The ST216 can be locked when it is idle not firing or while it is firing It cannot be locked while it is being programmed Power Failure Recovery If power fails during firing then the ST216 recovers as follows For power failure during start delay the ST216 times of...

Page 15: ...te It has been found that a kiln controller will give greater heat work as the temperature increases Therefore to achieve a stoneware firing of cone 8 9 we suggest setting the final soak temperature to 1235 C A slight adjustment can then be made after the first firing It should be remembered that kiln controllers are indicators of temperature and the effects of faster or slower firings may cause e...

Page 16: ...Page ST216 User Handbook 16 Notes ...

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