Program No: User Handbook
Contents
1. Clhr hr min At the end of the soak period the next required segment will be run If no more segments are required the kiln is allowed to cool naturally see page 14 and showing the soak time remaining Information The ST325 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 ST325 will apply heating power to the kiln for 12 seconds every 30 seconds The right hand decimal 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 ST325 User Handbook Page 11 Sample Glass Programs Sample Glass Programs Program Seg 3 Seg 3 Seg 3 Seg 4 Seg 4 Seg 4 Description Ramp Soak Soak Rate Temp Time en eo Float Glass Fuse 150 1538 4 6mm Float Glass Slump A 3 6mm Bullseye Fuse 204 538 00 00 6mm Bullseye Slump 704 00 20 6mm Spectrum System 96 Fuse 200 500 6mm Spectrum System 96 Slump 704 Bottle Firing Cycle 170 00 10 End Sz oO o oO f oO Q e oa m m Qa a oO oO e f High Stain E a O O oa oO gt CI oO oO The ST2. Event Output o While displaying a ramp rate 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 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 lt O x O 00O O O ST325 User Handbook Page 19 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 ST325 see installation handbook Keeping the green fn key pressed down press the i key again to display the current set point target temperature Keyboard Lock Facility The keys on the ST325 can be locked so that pressing them has no effect This is an anti tamper feature used to ensure that the operation of the T325 or the program data cannot be altered by un authorised people The ST325 can be locked when it is idle not firing or while it is
3. Programming A firing segment cooling ramp gt soak period soak temperature heating ramp An ST325 firing segment comprises a ramp followed by a soak period Two segments can be used for simple firing bisque firing for example or up to 32 segments can be used per program for complex firing crystal glazing or glass making for example The ST325 ramps the kiln temperature at the required ramp rate until the kiln reaches the soak temperature It then soaks dwells at the soak temperature for the soak time It then runs subsequent seg ments until the end of the program is reached The ST325 is capable of both positive heating ramps and negative cooling ramps as used in glassmaking for annealing The type of ramp is clearly shown on the mimic display during firing The ramp rate is settable in the range 1 C hour to 999 C hour or FULL full power 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 Note during soaking the ST325 display alternates every 15 seconds between kiln temperature and soak time remaining Page 6 ST325 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 co
4. 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 ST325 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 high 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 tempera
5. Notes Available ramp rate displays are End 999 amp FULL If End is shown but another segment is required then push the t key to obtain the required ramp rate in the range 1 C hr to 999 C hr If full power is required then push the t 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 ST325 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 correct errors or to exit programming mode FAQ Frequently Asked Questions Q During programming the COOLING lamp sometimes flashes when want the kiln to heat why is this A The ST325 asks you to input the ramp rate before it asks for the soak temperature so if the still to be set soak temperature in the current segment is less than the soak temperature in the previous segment the ST325 will assume cooling is required This anomaly will be rectified when all of the program has been entered This can be confirmed by stepping through the completed program with the key Q During programming the HEATING lamp sometimes flashes when want the kiln to cool why is this A The ST325 asks you to input the ramp rate before it asks for the soak temperature so if the still t
6. 300 C 00 00 FULL 1140 C Temperature Glaze 1140 C Mid Range 00 C hr 300 C 00 00 FULE 1200 C Stoneware Glaze 1200 C Standard 00 C hr 300 C 00 00 FULL 1235 C Stoneware Glaze 1260 C see note Onglaze 780 C 00 C hr 400 C 00 00 FULL 780 C Lustre 750 C 00 C hr 400 C 00 00 FULL 750 C 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 controller 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 All of the information on this page was kindly provided by Reg Griggs of Clayman Supplies Limited www claymansupplies co uk ST325 User Handbook Page 9 Sample Ceramics AE Temperature Display This section only applies to multi zone 2 or 3 zones kilns A single zone kiln will always show the temperature of
7. 325 is provided pre programmed with the sample Bullseye is a registered trademark of the Bullseye Glass programs shown above which may be modified as required Company www bullseyeglass com These programs were kindly provided by Kilncare Ltd www kilncare co uk and The Creative Glass Guild System 96 is a registered trademark of the Spectrum Glass www creativeglassguild co uk Company Inc www system96 com Page 12 ST325 User Handbook ST325 User Handbook Page 13
8. Mains power switch e Micro SD memory card reader Page 4 ST325 User Handbook Fan Output To enter damper temperature configuration mode press and hold down 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 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 temper
9. Please photocopy me Program No Further copies of this handbook may be found at www staffordinstruments co uk docs st32x user325 pdf Page 24 ST325 User Handbook Please photocopy me TAFFOR INSTRUMENTS ST32 5 User Handbook TAFFOR INSTRUMENTS ST325 Temperature Programmer Stafford Instruments Ltd Tel 44 0 1785 255588 Fax 44 0 1785 255589 www staffordinstruments co uk C email support stafford inst co uk See separate handbook for User Instructions Issue 1 02 Copyright 2011 Stafford Instruments Ltd Date 21 Feb 2011 At A Glance DISPLAY MAIN DISPLAY INDICATORS SE LANE EVENT LAMP PAUSED LAMP a DISPLAY CONTROL KEYS 6 CARD READER GTAFEOR ON SIDE INSTRUMENTS POWER SWITCH COOLING ON BASE RAMP LAMP SOAK TIME LAMP SOAK TEMPERATURE LAMP HEATING RAMP LAMP Page 2 ST325 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 bung left open All error messages cause the ST325 to terminate the firing with all the keys locked An alarm buzzer sounds once per second SWITCH KILN OFF To reset the ST325 turn off the power to the instrument and have the fault investigated and rectified by your installer or kiln service engineer
10. ature The fan then turns off and stays off until the end of the program ST325 User Handbook Page 21 Control Relay Damper Output To enter damper temperature configuration mode press and hold down 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 O C The damper close temperature prompt is shown Release the amp keys O C hr Press the key O bhr min O C The damper close temperature is now shown Adjust with the amp keys O C hr hold down for acceleration O hr min Press the key O C The damper open temperature prompt is now shown O C hr Press the key O hr min O C The damper open temperature is now shown Adjust with the amp keys O C hr hold down for acceleration O hr min 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 the firing and when the kiln has cooled naturally to the damper open temper
11. ature the damper will open Page 20 ST325 User Handbook Turning On Turn on the mains supply to the controller using the switch on the base c crr hr min Orc O chhr O hr min When turned on the ST325 performs a display test by briefly illuminating all of the display digits and all of the front panel lamps The version number of the embedded software is now displayed If you need technical support you may be asked for this code together with the ST325 s serial number Next displayed is the thermocouple type to which the ST325 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 ST325 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 ST325 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 Programming
12. ed 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 ST325 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 at high temperatures kiln damage could result ST325 User Handbook Page 17 O hm n Adjusting While Adjusting While Firing Adjusting While Firing Firing values can be adjusted while the ST325 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 ST325 will return to its normal runni
13. eeeceeeeeeesaeeeeeenaeeeseeeeeeeenaeeeenenaes 6 8 Sample Ceramics Programs cscceeesceceseneeeseeneeeeeneeeeeeenaeeeeeeaeees 9 Temperature Display ccccecceceeeeeeeeeeceeeeeeeeeeceeeaeeeeeeeseeeeaeeeeeeeees 10 FINNO seien enee E rere rer street tetera rer E 11 Sample Glass Programs cceseeeeeeceeeeneeeeeeneeeenneeeeeeneeeeeenaes 12 13 COOMING PETETA E PEET EA A E ined sansadneacea tenga sani 14 Operating NOLS tai soeesichscceescduiiesscccecies Stbeesialebbeacedepivgcceeneta coeseae eke iooee 15 Adjusting While Firing ccccccecceceeeceeeececeeeeeeeeeeeeneaeeeeeeeeeeeeea 16 17 Other Feature Sieiro op argian ie iaoe nin ar asa a E A 18 Card REAGEM ssi ico cecesesss ces ieoez cesses cheats ceceasteiesestscecesesstenesavatvosdeuetinaricese 19 Control REIAY siiret e aE EERE 19 21 Error M SSAG S iniisa Anaa 22 23 Program RECOrd Sheets soiien arcnak renine aaa 24 Features e Multi zone e 32 programs each with up to 32 segments e 1 controlled heating cooling ramp soak per segment e Soak times up to nearly 100 hours e Ramp rates from 1 to 999 C hour full e Ideal for glass or ceramics use e Programs can be altered while firing e Program pause segment 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 amp set point display e Alarm Buzzer amp Alarm Relay Output e
14. firing It cannot be locked while it is being programmed C If the left hand decimal point in the display is lit then the ST325 is locked O Cihr Press and hold in both the amp O hr min keys for 5 seconds to unlock the T325 O C If the left hand decimal point in the i display is not lit then the ST325 is not O C hr locked Press and hold in both the O hr min amp keys for S seconds to lock the T325 Power Failure Recovery If power fails during firing then the ST325 recovers as follows For power failure during start delay then by default the ST325 times off the remaining start delay when power returns configurable can be set to fire immediately when power returns see installation manual For power failure during ramping the ST325 continues the ramp it was pre viously executing For power failure during soaking the ST325 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 ST325 will then lock up with FAI L displayed and kiln off in the event of power failure Page 18 ST325 User Handbook Changing entering a program SEGMENT oe nee z 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 Segment 1 is displayed O C If the left hand decimal point is on then the keyboard
15. is locked Press the amp keys O C hr together amp hold down for 5 seconds to _ unlock O hr min 5 Press the key to display the currently O C selected flashing program number This O C hr can be changed as required with the amp keys There are 32 programs available O hr min Note holding down the or keys causes rapid change of the displayed value O C then displays the ramp rate in the range 1 to 999 C hr or FULL or End This can be C hr altered with the amp keys The HEATING RAMP or COOLING RAMP O hr min lamp on the mimic display will flash O C then displays the soak temperature in the range 0 to 1320 C This can be altered O C hr with the amp keys The SOAK TEMPERATURE lamp on the mimic O hr min display will flash O C The next push of the key displays the soak time in the range 00 00 to 99 59 99 O C hr hours 59 mins This can be altered with the t amp keys The SOAK TIME lamp on hr min the mimic display will flash SEGMENT 7 A further push of the key increments the segment display digit and m firing data for the next segment can be entered Continue programming susequent segments as required 5 Data entry is terminated if End is selected O C for a ramp rate with the key Data entry O C hr is also automatically terminated if 32 segments have been entered O hr min ST325 User Handbook Page 7 Programming Programming Programming
16. mic 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 and End O c O c Cooling To return the ST325 back to idle condition ready for the next firing press the START STOP key or turn off the power to the instrument Page 14 ST325 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 c During firing the right hand decimal point O will periodically light this shows when O C hr heating power is being applied to the kiln Cc elements O hr min F 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
17. ng 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 Segment Advance Facility While firing press and hold down the green fn function key then press the gt gt advance key The ST325 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 ST325 will terminate this and start firing immediately If ramping is currently executing then the ST325 will switch to soak at the current kiln temperature If currently soaking then the ST325 will advance to the next segment if any or else it will end the firing Changes made to the operation of the ST325 in this way are temporary and are not stored Page 16 ST325 User Handbook Sample Ceramics Programs Program Name Segment 1 Segment 1 Segment 1 Segment 2 Segment 2 Segment 2 Segment 3 Ramp Rate Soak Temp Soak Time Ramp Rate Soak Temp Soak Time Ramp Rate Slow ees Pere C hr eel C 00 00 FULL E C aa 00 Normal eee 00 C hr 600 c 00 00 FULL 1000 C 00 00 CREN High Bisque 00 C hr 600 C 00 00 FULE 1140 C 00 00 Brush on 00 C hr 300 C 00 00 FULL 1000 C Earthenware Glaze 1000 C Cone 6 Standard 00 C hr 300 C 00 00 FULE 1100 C Earthenware Glaze 1100 C Earthenware High 00 C hr
18. ntroller Files on the card can be used to modify the configuration of 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 ST325 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
19. o be set soak temperature in the current segment is more than the soak temperature in the previous segment the ST325 will assume heating is required This anomaly will be rectified when all of the program has been entered This can be confirmed by stepping through the completed program with the key Q During programming End is displayed when want to enter another segment why is this A Available ramp rate displays are End 999 amp FULL If End is shown but another segment is required then push the t key to obtain the required ramp rate in the range 1 C hr to 999 C hr If full power is required then push the amp key until FULL is displayed Q How do declare the end of the program Press the key to advance to the next segment Push the key until End is displayed Press the key again to exit programming mode Page 8 ST325 User Handbook Program Pause Facility While firing press and hold down the green fn function key then press the l pause key The ST325 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 lect
20. ture 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 ST325 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 ST325 User Handbook Page 3 Quick Start Guide Contents Features Contents At amp GlANCE E E T 2 Quick Start GuIdG is is 0c5 ecco ecpesienaeeaiehayeniceedstaeentd eeascecreaneeseenaeeed 3 COMMIS oreinaren ena pe nice ees A a e eee rence eerie 4 FO atures E T E ieee 4 TRI UIN O scat ese Petron cteer cede ceneanates a ae e OaE 5 PrOQrAMMing ccceeeeeeeeeceeeeeeeeeeeeeeeea
21. ure 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 ST325 to restart the firing from the beginning The ST325 will look at the current kiln temperature and if this is greater than the required soak tem perature then the ST325 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 ST325 is turned off In the event of power failure during firing the ST325 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 ST325 is turned on This zeroing feature can be changed to allow a previously en tered delayed start time to be remembered see installation handbook ST325 User Handbook Page 15 Cooling Upon completion of firing the ST325 lights all lamps on the mi
22. 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 ST325 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 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 ST325 User Handbook Operating Notes Kiln too slow If the ST325 is programmed to heat the kiln at a faster rate than the kiln is capable of then the ST325 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 ST325 is programmed to cool the kiln at a faster rate than the kiln is capable of then the ST325 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 ST325 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 temperat
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