Sample Programs Sample Programs User Handbook
Contents
1. amp keys The RAMP 1 O hr min lamp on the mimic display will flash Continue entering program data as required Terminate the linked program sequence with L OFF Page 8 ST326 User Handbook Program Pause Facility While firing press and hold down the green fn function key then press the l pause key The ST326 will pause the executing program To un pause the program repeat the above key press sequence The effects of pausing are as follows If paused during ramping the kiln temperature will be held soaked indefi nitely at the current kiln temperature The ramp will continue when un pause is selected If paused during soaking then the soak time will be extended indefinitely The remainder of the soak period will be resumed when un pause is se lected Segment advance gt gt can also be used to terminate the pause This will advance the segment and will immediately terminate a paused soak ad vancing to the next segment if any Changes made to the operation of the ST326 in this way are temporary and are not stored O O C As a warning during pause a double beep is sounded every 10 seconds I O C hr and the display scrolls PAUSEd The O O hr min PAUSED lamp to the bottom left of the main display is lit WARNING PROGRAM PAUSE The program pause facility should be used with care Program execution is suspended and the kiln will be held at its current temperature indefinitely If left too long a2. keys The RAMP 3 lamp on the mimic display will flash Page 7 Programming O C then displays temperature t3 in the range 0 to 1320 C This can be altered O C hr with the amp keys The T3 lamp on the P mimic display will flash O hr min The next push of the key exits programming mode if program linking is not enabled The ST326 is returned to the idle display showing kiln temperature Program linking is not enabled by default but can be enabled if required by reference to the Installation Manual Program linking enables programs to be joined together to form a sequence e g 1 2 3 or 42 43 etc All of the linked programs are run consecutively Up to 99 programs could be linked together If program linking is enabled then the next push of the key shows the following O C The display will either show LoFF link off P or Lon link on and can be changed with O Cihr the amp keys O hr min If LoFF is shown then this is the end of the linked program sequence The next push of the key will exit programming mode and the ST326 will return to the idle display showing kiln temperature 8 i mu O C If Lon is shown then the next push of the key causes the program number to be O Clhr increased by 1 and the display prompts for O hr min ramp 1 data as shown below 8 J O C Displayed ramp 1 rate in the range 1 to 999 C hr or FULL or End This can be Clhr altered with the
3. C To change the displayed zone channel press either the or keys again Ch O C hr amp fh 2 will be shown for 2 zone kilns and 3 Ch J will be shown for 3 zone kilns O hr min O C To display the zone temperature either wait 5 seconds or press the or keys O Chhr O hr min Temperature Dispaly Page 10 ST326 User Handbook Operating Notes Kiln too slow If the ST326 is programmed to heat the kiln at a faster rate than the kiln is capable of then the ST326 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 ST326 is programmed to cool the kiln at a faster rate than the kiln is capable of then the ST326 will apply zero power then wait until the kiln has cooled to the correct temperature before proceeding to the next ramp or soak segment Heating amp Cooling Ramps The ST326 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 T326 to restart the firing from the beginning The ST326 will look at the current kiln temperature and if this is greater than the required soak
4. O C If the left hand decimal point in the display is lit then the ST326 is locked O C hr Press and hold in both the amp O hr min keys for 5 seconds to unlock the ST326 C If the left hand decimal point in the i display is not lit then the ST326 is not O C hr locked Press and hold in both the O hr min amp keys for 5 seconds to lock the ST326 Power Failure Recovery If power fails during firing then the ST326 recovers as follows For power failure during start delay then by default the ST326 times off the remaining start delay when power returns configurable can be set to fire immediately when power returns see installation handbook For power failure during ramping the ST326 continues the ramp it was pre viously executing For power failure during soaking the ST326 ramps back up to soak tem perature at the correct ramp rate then applies the remaining soak period Power failure recovery can be disabled if required see installation hand book the ST326 will then lock up with FAI L displayed and kiln off in the event of power failure Page 18 ST326 User Handbook Changing entering a program When not firing no lamps lit on the mimic panel the firing lamp is off and the display shows the kiln temperature with the C indicator lit The currently selected program number is shown c O Clhr O hr min PROGRAM ru Note holding down the or keys causes rapid change of the d
5. same time while the controller is not running a program FIRING LAMP not lit Note in the sequence below if no key presses are detected within 15 seconds the instrument will exit configuration mode and configu ration changes will not be saved O C The fan start temperature prompt is shown Release the amp keys O C hr Press the key O hr min O C The fan start temperature is now shown Adjust with the amp keys hold down O Chhr for acceleration O hr min Press the key O C The fan stop temperature prompt is now shown C hr Press the key O hr min O C The fan stop temperature is now shown Adjust with the amp keys hold down O Cihr for acceleration O hr min Press the key Control Relay The instrument will now reset and the new fan control temperatures will be stored Note in the sequence above it is important that the key is pressed a total of 4 times else configuration changes will not be saved Fan Operation At the start of the firing the fan remains off while the kiln temperature is below the fan start temperature The fan starts when the kiln temperature has risen to the fan start temperature and remains on until the kiln tem perature has risen to the fan stop temperature The fan then turns off and stays off until the end of the program ST326 User Handbook Page 21 Control Relay Damper Output To enter damper temperature configuration mode pr
6. the firing and when the kiln has cooled naturally to the damper open temperature the damper will open Page 20 ST326 User Handbook Ov The version number of the embedded software is now displayed If you O C hr need technical support you may be O hr min asked for this code together with the ST326 s serial number Next displayed is the thermocouple type to which the ST326 is set This thermocouple type setting should match the type of thermocouple fitted to the kiln and can be R S K or N type R type thermo couple K type thermo couple c O Clhr O hr min c O Clhr O hr min c O Chr O hr min ST326 User Handbook S type thermo couple N type thermo couple Turning On The final display should show the kiln temperature 20 C shown here with the C indicator on All other lamps should be off If the left hand decimal point is on then the keyboard is locked This is an anti tamper feature Press the amp keys together amp hold down for 5 seconds to unlock If any mimic panel lamps are on then the ST326 is firing Press the START STOP key to stop the firing During firing the right hand decimal point will light to show when the kiln is heating Page 5 O Programmin Programming A Program Soak time 2 b gt A Ramp 3 i s An ST326 program comprises of a ramp to an intermediate tempera ture t1 followed by another ra
7. GM CIE li ele arene ore reree tren eterna rere tren reer eer Conner re crret 2 Quick Star GUC esgerin n nr E R 3 COMON arra N 4 EEE A E O A ET A E A eaten 4 UIT ne LE Aa E A E E T A 5 PROG MANINUING e eaa EE anes 6 9 Temperature Display cccccceeeeeeeeeeececeeeeeeesecsacaeeeeeeeees 10 FRU EE E E E T A E A neuaales 11 Program Record Sheet cccceccecececeeeeeeeneeeeseeneeeeeeeenaees 12 13 COONING EE E land Alaiel ile laddi dled 14 Operating NoteS t iaiiil ea E E 15 Adjusting While Firing secncsssncccnnircenicnarninanirn 16 17 Other Features srirnrnninni r rerna knne T EEEE RE 18 Card Reade ennenen naa a ET 19 Control Relay teicccccsscceecleteteceediee ea eetaiiedel aves cea 19 21 Error M ssageswis iiciiede Wiehe lela 22 23 Sample Programs encendi nia n ENER 24 Features e Multi zone e 99 programs e Program linking option e Soak times up to nearly 100 hours e Ramp rates from 1 to 999 C hour full e Ideal for ceramics use e Programs can be altered while firing e Program pause advance facilities e Event Damper Relay Output e Keyboard lockable e Delayed start facility up to nearly 100 hours e Power failure recovery e Info key for energy used and set point display e Alarm Buzzer amp Alarm Relay Output e Mains power switch e Micro SD memory card reader Page 4 ST326 User Handbook Fan Output To enter damper temperature configuration mode press and hold down the amp keys at the
8. Sample Programs The ST326 is provided pre programmed with the ceramic firing programs below These programs may be modified as required Program Program Name t2 Soak Time Number Soak Temp cae ee Eee Ee al eae aa 00 Normal Bisque 100 C hr 600 C 1000 C 00 00 4 High Bisque 100 C hr 600 C 1140 C 00 00 T 4 Brush on 100 C hr 300 C FULL 1000 C 00 00 End Earthenware Glaze 1000 C Cone 6 Standard 100 C hr 300 C FULL 1100 C 00 00 End Earthenware Glaze 1100 C Earthenware High 100 C hr 300 C FULL 1140 C 00 00 End Temperature Glaze 1140 C T Mid Range 100 C hr 300 C FULL 1200 C 00 00 End Stoneware Glaze 1200 C Standard 100 C hr 300 C FULL 1235 C 00 00 End Stoneware Glaze 1260 C see note Onglaze 780 C 100 C hr 400 C 780 C 00 00 Lustre 750 C 100 C hr 400 C 750 C 00 00 Note 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 extreme variations in the end result This is known within ceramics as heatwork Cones are measures of heatwork and it is strongly recommended that cones are always used in conjunction with a kiln controll
9. and End O c O c Cooling To return the ST326 back to idle condition ready for the next firing press the START STOP key or turn off the power to the instrument Page 14 ST326 User Handbook Firing Hint it is good practice to check that the program is correct by pressing the key amp checking the program number amp program contents before starting a firing To start a firing press the START STOP O C key The start delay time will be displayed O C hr The FIRING LAMP will flash prompting you to change the start delay using the O hr min amp keys If the delay is 00 00 the firing will start in 5 seconds or immediately if the STOP START key is pressed again O To During firing the right hand decimal point will periodically light this shows when O C hr heating power is being applied to the kiln elements O hr min O C When the kiln has ramped to the pro grammed soak temperature soaking com O C hr mences for the programmed soak time The display alternates between showing O hr min kiln temperature O c O Chr hr min and showing the soak time remaining Information The ST326 operates by calculating the amount of energy required by the kiln every 30 seconds If for example 40 of full energy is required to maintain a particular ramp rate or a particular soak temperature then the ST326 will apply heating power to the kiln for 12 seconds every 30 seconds The right hand decima
10. e switched on or off by hold I C hr ing in the fn function key then pressing O O I O ST326 User Handbook Page 19 the X event key The event relay will hr min be closed when the event lamp is on o While displaying a soak time the event C relay can be switched on or off by hold C hr ing in the fn function key then pressing the X event key The event relay will hr min be closed when the event lamp is on 00 O O Card Reader Control Relay Other Features Other Features Info Key Hold down the green fn key and then press the i key to display the energy used in kW hours If pressed during a firing it shows the energy used so far After a firing it shows the total energy used for that firing This infor mation is stored while power is off and is only reset to zero when a new firing is started If the value displayed is always 3 0 then the kiln power rating has not been configured into the ST326 see installation handbook Keeping the green fn key pressed down and then press the i key again to display the current set point target temperature Keyboard Lock Facility The keys on the ST326 can be locked so that pressing them has no effect This is an anti tamper feature used to ensure that the operation of the ST326 or the program data cannot be altered by un authorised people The ST326 can be locked when it is idle not firing or while it is firing It cannot be locked while it is being programmed
11. enter soak at the current kiln tempera ture Adjusting While Firing If currently soaking then the soak will be terminated and the ST326 will advance to ramp 3 ramping towards t3 at ramp rate 3 Changes made to the operation of the ST326 in this way are temporary and are not stored Page 16 ST326 User Handbook Programming Notes Available ramp rate displays are End i 999 amp FULL If full power is required push the key until FULL is displayed To declare the end of a program while prompted for a ramp rate push the key until End is displayed To exit programming mode at any time wait 10 seconds without pressing any keys the ST326 will then revert to the idle display Alternatively press the START STOP key to exit programming and to begin firing immediately The key can be used to reverse through the programming steps to cor rect errors or to exit programming mode Programming ST326 User Handbook Page 9 Temperature Display 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 C For multi zone kilns the temperature of each zone can be displayed Zone 1 is O C hr displayed by default when the ST326 is powered on O hr min O C To check which zone channel is currently displayed press the or keys The O C hr Zone temperature will be displayed again after 5 seconds or if the or keys are O hr min pressed O
12. er to appreciate the differences between heatwork and temperature indicated by the controller Stoneware firings will also demonstrate the greatest potential differences between heatwork and indicated temperature Sample EER All of the information on this page was kindly provided by Reg Griggs of Clayman Supplies Limited www claymansupplies co uk Further copies of this handbook may be found at www staffordinstruments co uk docs st32x user326 pdf Page 24 ST326 User Handbook TAEEOR ST326 User Handbook TAFFOR INSTRUMENTS ST326 Temperature Programmer Stafford Instruments Ltd www staffordinstruments co uk C Tel 44 0 1785 255588 email support stafford inst co uk Fax 44 0 1785 255589 See separate handbook for User Instructions Issue 1 02 Copyright 2011 Stafford Instruments Ltd Date 15 Feb 2011 At A Glance DISPLAY MAIN DISPLAY INDICATORS SEINE LAME EVENT LAMP PAUSED LAMP SUN DISPLAY CONTROL KEYS 6 CARD READER Sirie ON SIDE INSTRUMENTS POWER SOAK TIME LAMP SWITCH ON BASE SOAK TEMPERATURE LAMP RAMP 2 LAMP RAMP 3 LAMP t3 LAMP t1 LAMP RAMP 1 LAMP Page 2 ST326 User Handbook O C Error 7 Maximum room temperature exceeded The internal temperature of O C hr the ST325 has exceeded an installer z selectable 30 70 C limit O hr min Possible causes are room vent fan failure ventilation grills blocked kiln room too small damper or b
13. ess and hold down Turning On Turn on the mains supply to the controller using the switch on the base the amp keys at the same time while the controller is not running a program FIRING LAMP not lit Note in the sequence below if no key presses are detected within 15 seconds the instrument will exit configuration mode and configu ration changes will not be saved c crr hr min When turned on the ST326 performs a display test by briefly illuminating all of the display digits and all of the front panel lamps O c O Chr O nhr min c O Clhr O bhr min O c O Clhr O hr min c O Clhr O hr min The damper close temperature prompt is shown Release the amp keys Press the key The damper close temperature is now shown Adjust with the amp keys hold down for acceleration Press the key The damper open temperature prompt is now shown Press the key The damper open temperature is now shown Adjust with the amp keys hold down for acceleration Press the key The instrument will now reset and the new damper control temperatures will be stored Note in the sequence above it is important that the key is pressed a total of 4 times else configuration changes will not be saved Damper Operation Prior to firing the damper will be open During firing when the kiln reaches the damper close temperature the damper will closed At the end of
14. f the controller Card files can also be used to update the operating firmware software of the controller if necessary for bug fixes or to add extra features or options You could request a pre programmed card be sent through the post Alternatively the files may be sent via email or downloaded from our website and then copied on to a suitable card The controller has been tested with several makes of 1G amp 2G micro SD cards Suitable cards are available from Stafford Instruments Note to copy files to the card your computer will need either an SD memory card slot or a USB card programmer You may also need an SD to micro SD card adapter often sold with the micro SD card Your computer will recognise the card as aremovable disk The files should reside in the root directory of the card disk Only FAT16 is supported To update the controller first turn it off Insert the card into the controller s slot Press and hold down the green fn key while turning the controller on The C C hr amp hr min lamps will now flash showing an update is in progress Release the fn key Wait for the update to finish might take up to 2 minutes then remove the card Control Relay Control Relay Configuration The ST326 has a relay output that can be configured see installation instructions as not used a damper control output a fan control output or an event output Event Output O 4 While displaying a ramp rate the event C relay can b
15. gh The kiln has been on zero power for 30 O C hr minutes but the kiln temperature has not fallen by at least 1 C O hr min Error Messages Possible causes are contactor failure or thermocouple connection intermittent or high resistance O C Error 5 Kiln temperature overshoot The kiln temperature exceeds the desired O C hr temperature by at least 10 C 50 C installer selectable O hr min O C Error 6 Maximum firing time exceeded The length of the current firing has O C hr exceeded an installer selectable 10 999 i hours limit O hr min Page 22 ST326 User Handbook Quick Start Guide Switch on amp wait for kiln temperature display To run a firing program set up previously press the START STOP key To stop the firing at any time press the START STOP key again To review firing data press the key to enter the programming menu To change firing data press the amp keys to change the displayed value Use the key again as necessary to index to the next firing value or segment to be reviewed or changed To mark the end of a program set a ramp rate to End with the key To exit the programming menu either wait 10 seconds or press the START STOP key to start firing If the keyboard is locked then press the t amp keys together amp hold down for 5 seconds to unlock ST326 User Handbook Page 3 Quick Start Guide Contents Features Contents A
16. isplayed value Ovc chrr O hr min c O Chr O hr min O c Chhr O hr min c O Chhr O hr min O c O Chhr hr min O c Clhr O hr min ST326 User Handbook If the left hand decimal point is on then the keyboard is locked Press the amp keys together amp hold down for 5 seconds to unlock Press the key to select a flashing pro gram number This can be changed as required with the amp keys There are 99 programs available then displays ramp 1 rate in the range 1 to 999 C hr or FULL or End This can be altered with the amp keys The RAMP 1 lamp on the mimic display will flash then displays temperature t1 in the range 0 to 1320 C This can be altered with the amp keys The T1 lamp on the mimic display will flash then displays ramp 2 rate in the range 1 to 999 C hr or FULL or End This can be altered with the amp keys The RAMP 2 lamp on the mimic display will flash Programming then displays temperature t2 soak temp in the range 0 to 1320 C This can be altered with the amp keys The T2 lamp on the mimic display will flash The next push of the key displays the soak time in the range 00 00 to 99 59 99 hours 59 mins This can be altered with the t amp keys The SOAK TIME lamp on the mimic display will flash then displays ramp 3 rate in the range 1 to 999 C hr or FULL or End This can be altered with the amp
17. l point in the display will light for 12 seconds every 30 seconds If the kiln has a contactor then a loud click will be heard both when the decimal point lights up and when it goes out If full heating power is required then the decimal point will remain lit If full cooling is required then the decimal point will remain off ST326 User Handbook Page 11 iring F Program Record Sheet jaw Adoosojoud aseajg lt b Ec EE x amp of h C hr rogram Ramp 1 O jaw Adooojoud se jd P N ST326 User Handbook ST326 User Handbook Page 13 12 Page
18. mp to the soak temperature t2 The ST326 then soaks dwells at the soak temperature for the soak time An optional final ramp to t3 is also provided On the mimic panel ramps 1 amp 2 are depicted as heating ramps and ramp 3 is depicted as a cooling ramp but actually the ST326 is capable of both positive heating ramps and negative cooling ramps and any of the ramps can be set to be either heating or cooling Each ramp rate is settable in the range 1 C hour to 999 C hour or FULL full power full cool or End end of program The soak temperature is settable over the range 0 to 1320 C The soak time is settable over the range 00 00 no soak to 99 hours 59 mins Ramp 3 can be disabled if not required setting the ramp rate to End or by setting the ramp rate to FULL and setting t3 to anything less than t2 A program linking feature is available for complex firings This feature is disabled by default but can be enabled by reference to the Installa tion Handbook Note during soaking the ST326 display alternates every 15 seconds between kiln temperature and soak time remaining Page 6 ST326 User Handbook Card Reader This controller has a card slot for a micro SD mem ory card the same type of card as used on many mobile phones The card can only be inserted one way around with the gold contacts facing away from you towards the back of the controller Files on the card can be used to modify the configuration o
19. t high temperatures kiln damage could result ST326 User Handbook Page 17 O hm n Adjusting While Adjusting While Firing Firing values can be adjusted while the ST326 is firing Also there are pro gram pause un pause and segment advance features that are particulary useful for glass work Adjusting Firing Values While firing operate the key to select the required parameter as shown by a flashing lamp on the mimic display The firing value is shown on the main display and can now be adjusted with the amp keys in the usual way The contents of the current segment or any segment still to be executed can be changed Firing will still carry on as normal while these changes are being made The ST326 will return to its normal running display 10 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 green fn function key then press the gt Pb advance key The ST326 will sound a short beep and the executing program will immediately advance one step as indicated by lamps on the mimic panel The effect of this is as follows If a start delay is currently executing then the ST326 will terminate this and start firing immediately If ramping to t1 the ST326 will advance to ramp 2 ramping towards t2 at ramp rate 2 If ramping to t2 then the ST326 will
20. tem perature then the ST326 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 Operating Notes 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 amp necessary data are remembered when the ST326 is turned off In the event of power failure during firing the ST326 will automatically resume firing when power is returned this feature can be disabled see installation handbook Delayed Start The delayed start time period is by default set to 00 00 when the ST326 is turned on This zeroing feature can be changed to allow a previously en tered delayed start time to be remembered see installation handbook ST326 User Handbook Page 15 Cooling Upon completion of firing the ST326 lights all lamps on the mimic display and the kiln is allowed to cool naturally c O Chr O Chr O hr min O hr min While the kiln temperature is above 40 C the display alternates every 5 seconds between the kiln temperature and Hot c O Chr O Chr O hr min O hr min When the kiln has cooled to less than 40 C the display alternates every 5 seconds between the kiln temperature
21. ung left open All error messages cause the ST326 to terminate the firing with all the keys locked An alarm buzzer sounds once per second SWITCH KILN OFF To reset the ST326 turn off the power to the instrument and have the fault investigated and rectified by your installer or kiln service engineer 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 recom mended such as the Stafford Instruments ST121 Technical note any error message will cause the alarm relay to open see installation handbook for details ST326 User Handbook Page 23 Error Messages Error Messages O C Error 1 The kiln temperature is not increasing as required The kiln has been O C hr on full power for 1 hour but the kiln O himii temperature has not risen by at least 8 C Possible causes are kiln door or lid not closed properly heater element failure elements too old power phase failure contactor failure or thermocouple short circuit O C Error 2 Thermocouple or thermocouple wiring open circuit Get thermocouple and O C hr wiring checked Have thermocouple replaced if necessary O hr min O C Error 3 Thermocouple reversed kiln temperature apparently less than 40 C O C hr This is an installation fault Get wiring 3 checked O hr min O C Error 4 Kiln temperature too hi
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