background image

Page 

     ST312A 

User 

Handbook 

MAIN DISPLAY 

SEGMENT 
MIMIC 
DISPLAY 

DISPLAY 
INDICATORS 

CONTROL 

KEYS 

(5) 

At A Glance 

DELAYED 
START LAMP 

t1 LAMP 

SOAK TIME LAMP 

SOAK TEMPERATURE LAMP 

RAMP 1 LAMP 

RAMP 2 LAMP 

At A

 Glance 

FIRING LAMP 

ºC

t

ST312A User Handbook 

 

 

 

 

       Page   19 

Sample Programs 

Name

 

Ramp 1

 

t1 

Soak time

 

Low Biscuit 

70°C/hr 
 

600°C 

00:15 

Normal Biscuit 

70°C/hr 
 

600°C 

00:15 

High Biscuit 

70°C/hr 
 

600°C 

00:15 

Earthenware Low 
Temperature Glaze 

90°C/hr 
 

600°C 

00:30 

Earthenware Mid 
Temperature Glaze 

90°C/hr 
 

600°C 

00:30 

Earthenware High 
Temperature Glaze 

90°C/hr 
 

600°C 

00:30 

Stoneware Glaze 

90°C/hr 
 

600°C 

00:30 

On Glaze Enamel 

90°C/hr 
 

600°C 

00:30 

Heavy Sculpture 

50°C/hr 
 

300°C 

00:30 

Lustre 

90°C/hr 
 

600°C 

00:00 

Ramp 2 

FULL 

FULL 

FULL 

FULL 

FULL 

FULL 

FULL 

FULL 

70°C/hr 

FULL 

Soak temp 

960°C 

1000°C 

1160°C 

960°C 

1040°C 

1140°C 

1250°C 

780°C 

1000°C 

750°C 

Sample Pr

ograms 

Notes

 

Earthenware High Temperature Glaze is also suitable for Stoneware Low 
Temperature Glaze. 
Stoneware Glaze is also suitable for Porcelain. 
On Glaze Enamel is also suitable for some enamelling work. 
Heavy Sculpture is also suitable for Terracotta. 

Summary of Contents for ST312A

Page 1: ...df ST312A User Handbook Page 1 ST312A User Handbook ST312A Temperature Programmer TAFFOR S D Stafford Instruments Ltd Tel 44 0 1785 255588 Fax 44 0 1785 255589 www staffordinstruments co uk email support stafford inst co uk Issue 2 00 Date 01 June 2009 See separate handbook for User Instructions Copyright 2009 Stafford Instruments Ltd ...

Page 2: ...0 30 Earthenware Mid Temperature Glaze 90 C hr 600 C 00 30 Earthenware High Temperature Glaze 90 C hr 600 C 00 30 Stoneware Glaze 90 C hr 600 C 00 30 On Glaze Enamel 90 C hr 600 C 00 30 Heavy Sculpture 50 C hr 300 C 00 30 Lustre 90 C hr 600 C 00 00 Ramp 2 FULL FULL FULL FULL FULL FULL FULL FULL 70 C hr FULL Soak temp 960 C 1000 C 1160 C 960 C 1040 C 1140 C 1250 C 780 C 1000 C 750 C Sample Programs...

Page 3: ...t locked Press and hold in both the ª keys for 5 seconds to lock the ST312A Power Failure Recovery If power fails during firing then the ST312A recovers as follows For power failure during start delay the ST312A commences firing immedi ately when power returns For power failure during ramp 1 or ramp 2 the ST312A goes back into the ramp it was previously executing For power failure during soaking t...

Page 4: ... to terminate the firing with all the keys locked An alarm buzzer sounds once per second SWITCH KILN OFF To reset the ST312A turn off the power to the instrument and have the fault investigated by your installer or kiln service engineer to rectify the fault Technical note any error message will cause the auxiliary alarm relay if fitted to open see installation handbook for details Note these error...

Page 5: ...hours limit Err6 C C hr hr min Possible causes are contactor failure or thermocouple connection intermittent or high resistance ST312A User Handbook Page 5 Turning On F1 04 tC r tC S tC n tC K 8 8 8 8 When turned on the ST312A performs a display test by briefly illuminating all of the display digits and all of the front panel lamps The version number of the software embedded within the ST312A is n...

Page 6: ...ogram Pause Facility While firing press and hold down the ª key for about 4 seconds The ST312A will pause the executing program To un pause the program press and hold down the ª key again for about 4 seconds The effects of pausing are as follows If paused during a ramp the kiln temperature will be held soaked indefi nitely at the current kiln temperature The ramp will continue when un pause is sel...

Page 7: ...re If currently soaking then the ST312A will end the firing Changes made to the operation of the ST312A in this way are temporary and are not stored Adjusting While Firing ST312A User Handbook Page 7 When the ST312A 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 20 C C hr hr min If...

Page 8: ...se through the programming steps to correct errors or to exit programming mode Note available ramp rate displays are End 1 999 FULL If End is shown but another segment is required then push the 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 key until FULL is diplayed ST312A User Handbook Page 13 Cooling Upon completion of firing the ST3...

Page 9: ...feature can be disabled see installation handbook Firing Delayed Start The delayed start time period is set to 00 00 when the ST312A is turned on ST312A User Handbook Page 9 Firing To start a firing press the START STOP key The RUN lamp will light To stop the firing prematurely press the START STOP key again 20 C C hr hr min If the left hand decimal point is on then the keyboard is locked the ST31...

Page 10: ...Page ST312A 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 ST312A User Handbook Page 11 Program Description Please photocopy me ...

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