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Stafford Instruments ST215C, Handbook, Page: 2 / 32

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ST215C User Handbook

 

2

 

At a Glance

 

temperature icon
ramp rate icon
time icon

radio icon

mimic display

segment display

main display

start/stop key

running LED

up key

right key

down key

left key

event LED

event key

fuse

cable

on/off switch

USB ready LED

USB socket

Segment

Summary of Contents for ST215C

Page 1: ...ST215C User Handbook Page 1 Temperature Programmer Handbook Issue 6 053 Date 25 May 2021 Copyright 2020 2021 Stafford Instruments Ltd www staffordinstruments co uk TAFFOR S D ST215C ...

Page 2: ...ce temperature icon ramp rate icon time icon radio icon mimic display segment display main display start stop key running LED up key right key down key left key event LED event key fuse cable on off switch USB ready LED USB socket Segment ...

Page 3: ...o 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 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 mode either wait 20 seconds or press the key to start firing If the keyboard is locked then press the keys togethe...

Page 4: ... Features 5 Turning On 6 Programming 7 Control Relay Option 9 Firing 12 Cooling 13 Operating Notes 14 Adjusting While Firing 15 Error Messages 16 Sample Glass Programs 18 Sample Ceramics Programs 19 Other Features 20 WiFi USB Datalogging Option 21 Installation 26 Characteristics 32 ...

Page 5: ...m 1 to 999 hour FULL Ideal for glass or 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 Event damper fan control relay option WiFi USB datalogger option C F operation Features ...

Page 6: ...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 keyboard is UN LOCKED To re lock the keyboard press the keys together hold down for 5 seconds If any mimic panel lamps are on then the ST215C is fir...

Page 7: ... runs the next segment until the end of the program is reached The ST215C 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 hour to 999 hour or FULL full power or End end of program The soak target temperature is settable over the ran...

Page 8: ...hours minutes This can be altered in the range 00 00 to 99 59 with the keys The soak period indicator on the mimic panel will flash The next push of the key increments the segment number digit and firing data for the next segment can be entered Program data entry is terminated if End is selected for a ramp rate with the key Program data entry is also automatically ter minated if the maximum number...

Page 9: ...m The ST215C has an optional control relay that can be configured see installation section as not used an event output a damper control output or a fan control output Control Relay Option Event Output The event output can be programmed to change state at the start of a ramp and also at the start of a soak period Thus both ramp and soak events are possible The event output is ON relay contacts are ...

Page 10: ...temperature prompt is now shown Press the key The damper open temperature is now shown Adjust with the keys hold down for acceleration Press the key The ST215C 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 changes will not be saved Damper Output Damper Operation Prior to firing the da...

Page 11: ...ature prompt is now shown Press the key The fan stop temperature is now shown Adjust with the keys hold down for acceleration Press the key The ST215C 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 changes will not be saved Fan Output Fan Operation Prior to firing the fan will be off Duri...

Page 12: ...cular soak temperature then the ST215C will apply heating power to the kiln for 12 seconds every 30 seconds The kiln heating indicator will light for 12 seconds every 30 seconds If the kiln has a contactor then a loud click will be heard both when the kiln heating indicator lights up and when it goes out If full heating power is required then the kiln heating indicator will remain lit If full cool...

Page 13: ...ile the kiln temperature is above 40 C the display alternates every 5 seconds be tween the kiln temperature and HOt When the kiln has cooled to less than 40 C the display alternates every 5 seconds between the kiln temperature and End To return the ST215C back to idle condition ready for the next firing press the key or turn off the power to the instrument ...

Page 14: ...aused Pressing the key again will cause the ST215C to restart the firing from the begin ning The ST215C will look at the current kiln temperature and if this is greater than the required soak temperature then the ST215C will automatically cool from current temperature to the soak temperature This may not be what is desired so the key should only be used to halt the firing in an emergency The progr...

Page 15: ... changes are being made The ST215C 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 advance function The ST215C will sound a short beep and the executing pr...

Page 16: ... wiring checked Replace thermocouple if neces sary Thermocouple reversed kiln temperature apparently less than 40 C This is an instal lation 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 tem...

Page 17: ... limit Possible causes kiln room vent 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 dis played if a potential error is detected within the firing program when the key is pressed to start a firing The alarm buzzer will sound 3 times and the segment display will show the suspect segment num...

Page 18: ...15 182 427 00 00 End 3 6mm Bullseye Fuse 222 677 00 30 333 795 00 10 FULL 482 01 00 83 371 00 01 End 4 6mm Bullseye Slump 167 640 00 10 FULL 482 01 00 56 371 00 01 End 5 6mm Spectrum System 96 Fuse 200 500 00 00 FULL 804 00 12 FULL 540 00 40 150 510 00 20 End 6 6mm Spectrum System 96 Slump 155 704 00 20 FULL 540 01 30 FULL 510 00 10 26 371 00 00 End 7 Bottle Firing Cycle 170 510 00 00 250 780 00 1...

Page 19: ...20 Lustre 750 C 100 400 FULL 750 00 00 00 00 End 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 ...

Page 20: ...mper feature used to ensure that the operation of the ST215C or the program data cannot be altered by un authorised people The ST215C 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 ST215C recovers as follows For power failure during start delay the ST215C times off the rema...

Page 21: ...ed green Drive Mounted LED are mounted on the top panel of the controller A dust plug is provided for when a USB drive is not fitted FLASH Memory Drive Specification These can be either USB1 USB2 or USB3 drives USB3 drives have a blue insulator The drives must be formatted as FAT32 or FAT16 not NTFS or ExFAT The module has been tested with several makes of drive up to size 256Gbytes If the green L...

Page 22: ...en the firing is complete and when the kiln has cooled to 100 C A file LOGnnn CSV is created on the FLASH drive The first file to be created will be LOG000 CSV Subsequent firings will generate LOG001 CSV up to LOG999 CSV Only 1000 log files are allowed It is best to move the LOG files to another storage disk after just a few firings because it takes about 1 second to index each existing file on di...

Page 23: ...he event LED above the event key on the front panel will be off Year Month Day Hour Min Sec Kiln Temp Setpoint Ambient Temp Program Segment Event Status 2020 6 20 13 17 45 148 4 150 1 22 6 1 1 0 HEATING RAMP 2020 6 20 13 18 45 148 2 152 6 22 9 1 1 0 HEATING RAMP 2020 6 20 13 19 45 148 2 155 1 23 2 1 1 0 HEATING RAMP 2020 6 20 13 20 45 148 2 157 6 23 5 1 1 0 HEATING RAMP 2020 6 20 13 21 45 148 3 16...

Page 24: ...0 C hr to 600 C then soak 0 minutes Segment 3 FULL to 1250 C then soak 15 minutes Segment 4 End The contents of PROGRAMS TXT would be 7 1 50 120 60 0 7 2 150 600 0 0 7 3 1000 1250 15 0 7 4 0 0 0 0 Notes 1 Out of range values will not be stored 2 The last line of the program should have 0 0 0 0 as shown above to mark the end of the program 3 The event flag item on the end of each program line shoul...

Page 25: ...rature of 1050 C and with a kiln power rating of 3 0kW The contents of CONFIG TXT would be 50 60 0 0 2 1050 14 30 Note out of range values will not be stored ignored Note refer to the Installation Section for a full list of configuration parameters It is best to store this file on a separate drive and remove it from the controller after use In this way unnecessary re configuring is avoided the nex...

Page 26: ...15A Anti surge 20mm ceramic HRC IP50 To meet Electromagnetic Compatibility requirements the controller lead should not exceed 3 0m in length This instrument is designed for use mainly in Domestic Commercial Light Industrial environments where electromagnetic interference may cause a loss of accuracy of the displayed temperature reading of up to 3 C Specified accuracy will be restored when the inte...

Page 27: ...t can be removed from this bracket for in hand programming if required Spare wall brackets are available from Stafford Instruments Ltd our part number X00224 The coil of the each kiln contactor should be suppressed with an RC suppressor The RC suppressor must be connected directly across the coil terminals on the contactor Suitable proprietary RC suppressors are often available from contactor manu...

Page 28: ...utput L Event Damper Fan Control Output L Control Output Neutral N Earth 8 9 14 12 13 11 5 6 1 2 3 7 E A1 B1 A3 C3 B2 Shell B3 FUSE 3 15AT K1 K2 K3 90 264VAC CONTROLLER ORANGE WHITE BROWN BLUE WHITE BLACK YELLOW BLACK 7 GREY View on pins Note The wiring of the CPC14 connector varies between kiln manufacturers ROHDE wiring is shown Connecting Lead The ST215C is fitted as standard with a connecting ...

Page 29: ...lete If an error message is generated the firing is terminated the alarm buzzer sounds and the alarm output contact opens This output is usually used to drive a secondary policeman contactor to isolate power to the kiln elements 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 temper...

Page 30: ...fset 99 99 0 C 11 Proportional band 1 999 55 C 12 Integral time seconds 0 9999 200 0 disabled 13 Differential time seconds 0 999 10 0 disabled 14 Kiln element power 0 9999 0 1 unit 0 1kW 43 Engineer lockup on error 0 1 0 0 disabled 1 enabled 44 Control cycle time 5 120 30 Seconds 45 Event Damper Fan RL3 Function 0 3 0 0 off 1 event 2 damper 3 fan 46 Remember start delay 0 1 0 0 forget 1 remember 4...

Page 31: ...roller remembers the user entered start delay from the previous firing useful for repetitive overnight firings In either case the actual start delay can be edited by the user 47 Skip start delay after power failure By default this feature is disabled and in the event of a power failure while executing the start delay the controller times off the remainder of the start delay when power is restored ...

Page 32: ...nclosure Material ABS flame retardant UL 94V 0 Sealing IP51 Size 80 68mm W 165mm L 28mm D Colour Black Dark Grey RAL9011 RAL7012 Error Handling Thermocouple failure detection Thermocouple reversal detection Heater failure detection Kiln over temperature detection Room over temperature detection Lock up on error facility Firing run time hours limiter User program check Alarm buzzer Keyboard lock fa...

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