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ST312B User Handbook

Page

When the ST312B is not firing there are no lamps lit on the mimic panel,

the run lamp is off and the display shows the kiln temperature with the °C

indicator lit.

Altering the program



°C
°C/hr
hr.min

If the left

hand decimal point is on

then the keyboard is locked. Press
the





keys together & hold

down for 5 seconds to unlock.

The controller settings can be reviewed by pressing the



key.

Note: holding down the





keys causes rapid change of the displayed

value.



°C
°C/hr
hr.min

The first push of the



key displays

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 ramp rate 1 in the

range 1 to 999°C/hr or





This can be altered with the





keys. RAMP 1 lamp on the mimic

display will flash.



°C
°C/hr
hr.min



then displays temperature t1 in the

range 0 to 1400°C. This can be
altered with the





keys. The t1

lamp on the mimic display will flash.



°C
°C/hr
hr.min



then displays ramp rate 2 in the

range 1 to 999°C/hr or





This can be altered with the





keys. The RAMP 2 lamp on the

mimic display will flash.



°C
°C/hr
hr.min



then displays the soak temperature

in the range 0 to 1400°C. This can be
altered with the





keys. The

SOAK TEMPERATURE lamp on the

mimic display will flash.

ogram

ming

Содержание ST312B

Страница 1: ... User Handbook Page 1 ST312B User Handbook ST312B Temperature Programmer TAFFOR S D Issue 3 00 Date 05 Jan 2021 See separate handbook for Installation Instructions Copyright 2009 2021 Stafford Instruments Ltd ...

Страница 2: ...e ST312B User Handbook 2 MAIN DISPLAY MIMIC DISPLAY DISPLAY INDICATORS CONTROL KEYS 5 At A Glance DELAYED START LAMP t1 SOAK TIME LAMP SOAK TEMPERATURE LAMP RAMP 1 LAMP RAMP 2 LAMP At A Glance FIRING LAMP ...

Страница 3: ...TART STOP key again To review firing data 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 to be reviewed or changed To exit the programming menu either wait 10 sec onds or press the key to start firing If the keyboard is locked then press the keys together hold down for 5...

Страница 4: ...mple Programs 19 Single program 2 controlled heating cooling ramps soak Soak time up to 99 hours 59 mins Ramp rates from 1 to 999 C hour full Suitable for ceramics and glass use Program 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 alarm output Fea...

Страница 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 ...

Страница 6: ...he soak temperature for the soak time It then allows the kiln to cool naturally The ST312B is capable of both positive heating ramps and negative cooling ramps as used in glassmaking for annealing Ramp rate 1 ramp rate 2 are settable in the range 1 C hour to 999 C hour or full power or end of program t1 the soak temperature are settable over the range 0 to 1400 C The soak time is settable over the...

Страница 7: ... 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 ramp rate 1 in the range 1 to 999 C hr or or This can be altered with the keys RAMP 1 lamp on the mimic display will flash C C hr hr min then displays temperature t1 in the range 0 to 1400 C This can be altered with the keys The t1 lamp on the ...

Страница 8: ...OP key to exit programming and to begin firing immediately Programming A further push of the key completes data entry and no lamps on the mimic display will flash C C hr hr min Data entry is also completed if is selected with the key for either ramp rate 1 or ramp rate 2 Note the key can be used to reverse through the programming steps to correct errors or to exit programming mode Note available r...

Страница 9: ...anel will light If kiln heating is required then the right hand decimal point on the dis play will light while heating power is being applied to the kiln Information The ST312B operates by calculating the amount of energy required by the kiln every 30 seconds installer selectable If for example 40 of full energy is required to maintain a particular ramp rate or a particular soak temperature then t...

Страница 10: ...Page ST312B User Handbook 10 Program Record Sheet Ramp 1 C hr t1 C Ramp 2 C hr Soak Temp C Soak Time hr min Please photocopy me ...

Страница 11: ...ST312B User Handbook Page 11 Program Description Please photocopy me ...

Страница 12: ...a firing then the firing will be halted not paused Pressing the START STOP key again will cause the ST312 to restart the firing from the beginning The ST312B will look at the current kiln temperature and if this is greater than temperature t1 then the ST312B will automatically cool from current temperature to t1 at ramp rate 1 This may not be what is desired so the STOP key should only be used to ...

Страница 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 ST312B back to idle condition ready for the next firing press the START STOP key or turn off the power to the instrument Cooling ...

Страница 14: ...anges made to the program 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 ST312B will sound a short beep and the executing program will immedi ately 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 ST312B wil...

Страница 15: ...ll be 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 and end the firing program Changes made to the operation of the ST312B 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 10 sec...

Страница 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...

Страница 17: ...iary 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 ST131 Error 7 Maximum room temperature exceeded The internal temperature of the ST312B...

Страница 18: ...t 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 ST312B is locked Press and hold in both the keys for 5 seconds to unlock the ST312B C C hr hr min If the left hand decimal point in the display is not lit then the ST312B is not locked Press and hold in both the keys for 5 seconds to lock the ST312B Power F...

Страница 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...

Страница 20: ...Page ST312B User Handbook 20 www staffordinstruments co uk Supplied by ...

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