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ST315B User Handbook

Error Messages

Err

Mess

ages

Error 1. The kiln temperature is not

increasing as required. The kiln has been

on full power for 1 hour but the kiln

temperature has not risen by at least 8°C.

Error 2. Thermocouple or thermocouple

wiring open circuit. Get thermocouple

and wiring checked. Have thermocouple

replaced if necessary.

Error 3. Thermocouple reversed (kiln

temperature apparently less than

40°C).

This is an installation fault. Get wiring

checked.

Error 4. Kiln temperature too high. The

kiln has been on zero power for 30

minutes but the kiln temperature has not

fallen by at least 1°C



°C
°C/hr
hr.min



°C
°C/hr
hr.min



°C
°C/hr
hr.min



°C
°C/hr
hr.min

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.

Error 5. Kiln temperature overshoot. The

kiln temperature exceeds the desired

temperature by at least 10°C / 20°C

(installer selectable).



°C
°C/hr
hr.min

Error 6. Maximum firing time exceeded.

The length of the current firing has

exceeded an installer selectable (10

999

hours) limit.



°C
°C/hr
hr.min

Possible causes are: contactor failure or thermocouple connection intermittent

or high resistance.

Summary of Contents for ST315B

Page 1: ... User Handbook Page 1 ST315B User Handbook ST315B Temperature Programmer TAFFOR S D Issue 3 00 Date 05 Jan 2021 See separate handbook for Installation Instructions Copyright 2009 2021 Stafford Instruments Ltd ...

Page 2: ...2 MAIN DISPLAY SEGMENT MIMIC DISPLAY DISPLAY INDICATORS CONTROL KEYS 5 At A Glance DELAYED START LAMP SOAK TIME LAMP SOAK TEMPERATURE LAMP COOLING RAMP LAMP At A Glance FIRING LAMP Delay Cooling Heating Soaking HEATING RAMP LAMP ...

Page 3: ... press the key to enter the programming menu To change firing data press the 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 with the key To exit the programming menu either wait 10 sec onds or press the START STOP key to start firing If the keyboard is locked th...

Page 4: ... 9 programs each with up to 9 segments 1 controlled heating cooling ramp soak per segment Soak times up to 99 hours 59 mins Ramp rates from 1 to 999 C hour full Ideal for glass or ceramics use Programs 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 ...

Page 5: ...the type of thermocouple fitted to the kiln and can be R S K or N type R type thermo couple S type thermo couple K type thermo couple N type thermo couple C C hr hr min C C hr hr min C C hr hr min The final display should show the kiln temperature 20 C shown here with the C indicator on All oth er lamps should be off If the left hand decimal point is on then the keyboard is locked This is an anti ...

Page 6: ... the next segment until the end of the program is reached The ST315B 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 power or end of program The soak temperature is settable over the range 0 to 1400 C Th...

Page 7: ...the start delay time in the range 00 00 to 99 59 99 hours 59 mins This can be altered with the keys The DELAYED START lamp on the mimic display will flash C C hr hr min then displays the ramp rate in the range 1 to 999 C hr or or This can be altered with the keys The HEATING RAMP or COOLING RAMP lamp on the mimic display will flash C C hr hr min then displays the soak temperature in the range 0 to...

Page 8: ...hr hr min Data entry is terminated if is selected for a ramp rate with the key Data entry is also automatically terminated if 9 segments have been entered Note the key can be used to reverse through the programming steps to correct errors or to exit programming mode Note available ramp rate displays are If is shown but another segment is required then push the key to obtain the required ramp rate ...

Page 9: ...c panel will light If kiln heating is required then the right hand decimal point on the display will light while heating power is being applied to the kiln Information The ST315B operates by calculating the amount of energy required by the kiln every 30 seconds installer adjustable If for example 40 of full energy is required to maintain a particular ramp rate or a particular soak temperature then...

Page 10: ...Page ST315B User Handbook 10 Program Record Sheet Segment No Ramp C hr Soak Temp C Soak Time hr min Please photocopy me ...

Page 11: ...ST315B User Handbook Page 11 Notes Please photocopy me Program No ...

Page 12: ...ssed during a firing then the firing will be halted not paused Pressing the START STOP key again will cause the ST315B to restart the firing from the beginning The ST315B will look at the current kiln temperature and if this is greater than the required soak temperature then the ST315B will automatically cool from current temper ature to the soak temperature This may not be what is desired so the ...

Page 13: ...hr min C C hr hr min While the kiln temperature is above 40 C the display alternates every 5 seconds between the kiln temperature and When the kiln has cooled to less than 40 C the display alternates every 5 seconds between the kiln temperature and To return the ST315B back to idle condition ready for the next firing press the START STOP key or turn off the power to the instrument Cooling ...

Page 14: ...l running display 10 seconds after key presses cease or immediately after 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 key for about 4 seconds The ST315B will sound a short beep and the executing program will immedi ately advance one step as indicated by lamps on the mimic panel The ef...

Page 15: ...e resumed when un pause is se lected Segment advance key held down for about 4 seconds can also be used to terminate the pause This will advance the segment and will immedi ately terminate a paused soak advancing to the next segment if any Changes made to the operation of the ST315B in this way are temporary and are not stored C C hr hr min As a warning during pause a double beep is sounded every ...

Page 16: ... The kiln has been on zero power for 30 minutes but the kiln temperature has not fallen by at least 1 C C C hr hr min C C hr hr min C C hr hr min C C hr hr min 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 Error 5 Kiln temperature overshoot The kiln temperature exceeds the desired...

Page 17: ...ary 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 ST315B ...

Page 18: ...ot firing or while it is firing It cannot be locked while it is being programmed If the left hand decimal point in the dis play is lit then the ST315B is locked Press and hold in both the keys for 5 seconds to unlock the ST315B C C hr hr min If the left hand decimal point in the dis play is not lit then the ST315B is not locked Press and hold in both the keys for 5 seconds to lock the ST315B Power...

Page 19: ... C 00 30 FULL 1040 C Earthenware High Temperature Glaze 90 C hr 600 C 00 30 FULL 1140 C Stoneware Glaze 90 C hr 600 C 00 30 FULL 1250 C On Glaze Enamel 90 C hr 600 C 00 30 FULL 780 C Heavy Sculpture 50 C hr 300 C 00 30 70 C hr 1000 C Lustre 90 C hr 600 C 00 00 FULL 750 C Sample Programs Notes Earthenware High Temperature Glaze is also suitable for Stoneware Low Temperature Glaze Stoneware Glaze is...

Page 20: ...Page ST315B User Handbook 20 www staffordinstruments co uk Supplied by ...

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