Rio Grande Digital Temperature Controller Manuale utente

START/STOP Key

Starts and

stops a firing.

Press

after each programming

step.

Up Arrow Key

From press .Press

to select a program.

During a User Defined firing, press the

.will appear. Press . The current segment

ramp or hold number will appear. To skip, press again.

Page 6

At the display, press

.will appear. Use arrow keys to calibrate the con-

troller to fire hotter or cooler. Press to return to .

Page 9

During a User Defined firing, press

repeatedly until appears. Press .Eachtime

you press the , the hold time for the current segment

will increase by 5 minutes. Then press .Page6

During a User Defined firing,

press repeatedly until appears. Press .

Use the arrow keys to change the target temperature for the cur-

rent segment. Then press .Page6

During a firing, press repeatedly

until appears. Press . Use the arrow keys to change

the alarm temperature. Press .Tosilencethealarm,press

any key. Page 7

Down Arrow Key

From press

. The program you have

selected will appear one step

at a time. When ap-

pears, press .Page3

From

press .

Enter delay time. Press

.Page3

During firing, press

. The program you

entered will appear one step

at a time. Page 3

On during

programming.

On during

program review.

Blinks dur-

ing firing.

Indicator

Lights

Rio Grande

Digital Temperature Controller

Temperature Display

Tempera-

ture display is in °F.

Temper-

ature display is in °C.

See page 9 for instructions on

selecting °F and °C.

°F

°C Time Display : Separates

hours from minutes. Example:

Display shown above is 1 hour

and 2 minutes

Display Dot

Safety

The warranty on your Rio Grande

controller does not cover damage from

overfiring, regardless of the

circumstances. It is the operator’s

responsibility to make sure the kiln turns

off at the proper time.

GWhen the kiln is not in use, disconnect the

power.

GDo not leave the kiln unattended, especially near

the expected shut-off time.

GWear firing safety glasses when looking into the

firing chamber of a hot kiln.

GDo not touch hot sides of kiln. Keep unsuper-

vised children away.

GInstall your kiln at least 12 inches from any wall

or combustible surface.

GDo not open lid or door until kiln has cooled and

all switches are off.

GFire only in a well-ventilated, covered and pro-

tected area away from combustible materials.

GKeep cordset away from hot sides of kiln or fur-

nace.

GDANGEROUSVOLTAGE!Donottouchheat-

ing elements with anything. Disconnect before

servicing.

Which Instructions Apply to

Your Controller

When you first connect the power, the controller will dis-

play these messages, one after the other:

or a software code

If your controller shows instead of a software code

before appears, then the controller includes only Skip

Segment from "Advanced Features" on pages 6 - 7. If your

controller shows a software code before appears, then

the controller has all the features in this manual.

Contents

General Guidelines . . . . . . . . . . . . . . . . . . . . 3

Time and Temperature Display . . . . . . . . . . . . . . . . . . 3

Operation Begins from the

Display . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3

Thermocouple Inspection . . . . . . . . . . . . . . . . . . . . . . . 3

A Rapid Way to Scroll Numbers . . . . . . . . . . . . . . . . . . 3

Program Review & Repeat Firing . . . . . . . . . . . . . . . . . 3

Delay . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3

Power Failures . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3

Selecting and Firing a PMC Program . . . . . . 4

Message: Firing Completed . . . . . . . . . . . . . . . 4

Thunder Storms and Power Surges . . . . . . . . . . . . . . . 4

Selecting a Program . . . . . . . . . . . . . . . . . . . 4

PMC Programs Stored in Memory . . . . . . . . . . . . . . . . 4

Rate . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5

Hold . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5

Temperature Over-Shoot . . . . . . . . . . . . . . . . . . . . . . . 5

User Defined Programs . . . . . . . . . . . . . . . . 5

Theory of Operation. . . . . . . . . . . . . . . . . . . . . . . . . . . . 5

Advanced Features . . . . . . . . . . . . . . . . . . . . 6

Skip Segment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6

Add Hold Time. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6

Editing the Current Segment Target Temperature

During Firing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6

The Alarm . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

Lost Wax Burnout . . . . . . . . . . . . . . . . . . . . . 7

Error Messages. . . . . . . . . . . . . . . . . . . . . . . 8

/ Bad Programming . . . . . . . . . . . . . . . . . . . . . . 8

/ Electronics Too Hot. . . . . . . . . . . . . . . . . . . . . 8

/ Thermocouple Failure. . . . . . . . . . . . . . . . . . . 8

/ Thermocouple Reversed . . . . . . . . . . . . . . . . . 8

/ Fired Too Long . . . . . . . . . . . . . . . . . . . . . . . . 8

/ Power Failure. . . . . . . . . . . . . . . . . . . . . . . . . . . 8

/ Power Failure. . . . . . . . . . . . . . . . . . . . . . . . . . . 9

/ Thermocouple Failure . . . . . . . . . . . . . . . . . . . 9

/ Thermocouple Lag. . . . . . . . . . . . . . . . . . . . . . 9

Calibrating the Controller . . . . . . . . . . . . . . . 9

Selecting °F or °C Display . . . . . . . . . . . . . . . 9

Display Messages. . . . . . . . . . . . . . . . . . . . 10

Trouble Shooter . . . . . . . . . . . . . . . . . . . . . 10

Problem: Controller display is blank. No heat in kiln.

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10

Problem: Controller display turns on.

No heat in kiln. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11

Problem: Kiln switch box ½ amp fuses keep blowing.

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11

Shorthand Instructions . . . . . . . . . . . . . . . . 12

General Guidelines

Time and

Temperature

Display

Center Dot: Time

A center dot appears during

time display. It separates

hours from minutes. (Example: 1 hour, 30 minutes displays

as 01.30.) During temperature display, the dot disappears.

Single Right-Hand

Dot: °C

When temperature is

displayed in °C, a dot

appears in the lower

right. In °F display, it

disappears. You can

choose between Fahr-

enheit and Celsius dis-

play. See page 9.

Operation Begins from the

IdLE Display

must appear before you can fire the kiln.

IIf , , or other message appears instead of

when the kiln is first turned on, press the

key (the key with the circular arrow). will appear.

IIf you press during a firing, will appear. To

get back to , press again.

IIf the display shows an error message such as in-

stead of , see page 8.

I(firing completed) appears at the end of a firing.

To make appear, press .

Thermocouple Inspection

The small rod protruding into the firing chamber is the

temperature sensor, or thermocouple.

Caution: Bumping the thermocouple can push it

out of the firing chamber. This could cause an

overfire!

IA 1/8” diameter thermocouple should extend into the fir-

ing chamber ½” - 58”.

IA ¼” diameter thermocouple should extend into the fir-

ing chamber 1” or more.

IKeep shelves, posts and ware 1” - 1 ½” away from the

thermocouple.

A Rapid Way to Scroll Numbers

During programming, hold an arrow key down several

seconds, and numbers willbegin to scroll rapidly. Ordinarily,

you would press to raise a number and

to lower it. But sometimes it is faster to press the

opposite key. This is because the numbers scroll below 0000

to the highest number, and vice versa. Examples:

ITo program a 99.59 hour Hold when the display shows

00.00, press the once.

ITo program a FULL rate when the display shows 0000,

press the once.

ITo program a temperature of 200°F when the display

shows 1800°F, press the . That is faster than

pressing the .

Program Review & Repeat Firing

Program Review lets you check that the information pro-

grammed into the controller is correct. Program Review

shows the values for the program in active memory. Use Pro-

gram Review from to repeat the last program you

fired.

IPress the

key. The rate, temperature, hold, etc.

will display one after the other. Firing will continue.

Press the key. After rate, temper-

ature, hold, etc., will appear. Press .

will appear, and the kiln will begin firing the program just

reviewed.

Delay

Delay is a count-down timer. The kiln begins firing when

the timer runs out of time. Use Delay to fit a firing into your

schedule.

Caution: For safety, do not leave the kiln alone dur-

ing a delay or a firing. We cannot guarantee your kiln

against overfiring even though the controller is au-

tomatic.

After you have selected a program and the controller

is ready to begin firing, will appear.

Press the key once. will ap-

pear, alternating with .

Use the arrow keys to enter delay time. (The decimal

separates hours and minutes. Example: 1 hour 10

minutes = 01.10) Then press twice.

will appear, alternating with time left until the firing

begins.

Note: Press during delay to end the delay

and begin the firing. The maximum delay is 99

hours and 59 minutes.

Power Failures

After a power failure, the controller will continue firing

provided that:

IThe kiln temperature is above 212°F/100°C when the

power comes back on.

IThe temperature dropped no more than 180°F/100°C

while the power was off.

°F

°C

Program 4: PMC Original

Heating rate per hour: Full

Temperature: 1650°F

Hold: 2 hours

Program 5: PMC Gold

Heating rate per hour: Full

Temperature: 1830°F

Hold: 2 hours

Program 6: User Defined program

Program custom rates, temperatures, and hold times.

Selecting and

Firing a PMC

Program

From , press .

Press the key (not the

). Each time you press the , a dif-

ferent program will appear:

PMC Plus Fast

PMC Plus Slow

PMC3 Slow

PMC Original

PMC Gold

User Defined custom programming

When the PMC program you want appears, press

. will appear. Press to begin

firing. will appear and the Run indicator light

with begin blinking. The kiln is now firing.

To stop a firing before completion, press .

will appear, alternating with kiln temperature.

Note: Do not be concerned if your kiln makes a

clicking sound during firing. Kilns use relays to

power the elements. The relays click each time their

electrical contacts come together.

Note: The kiln’s actual firing rate may be less than

the rate you programmed, depending on the kiln

model, available voltage, and density of load you are

firing.

When the kiln fires to completion, it will beep for 30 sec-

onds. The display will show the following:

IFiring time

IPresent temperature

I(fired to completion)

To return to , press .

Power Failure Messages

The power failed during a cooling segment, and

the kiln cooled past the target temperature while the power

was off.

The power failed during firing and kiln tempera-

turewas below212°F/ 100°Cwhenthe powercameback on.

The power failed during firing and temperature

dropped more than 180°F / 100°C by the time the power

came back on.

CPLT Message:

Firing Completed

When the firing has success-

fully completed, the controller

will shut off power to the elements and sound an alarm for 30

seconds.Then threemessages willcycle oneafter theother:

(complete)

Firing time in hours and minutes

The current kiln temperature

Thunder Storms and Power Surges

Unplug the kiln or disconnect the power when the kiln is

not in use, especially during thunder storms and in areas

with frequent power surges. If the kiln is part way through a

firing when a storm begins, it is probably okay to continue

the firing with close supervision. Do not leave the kiln unat-

tended.

Selecting a

Program

PMC Programs Stored in Memory

Five PMC programs are stored in memory. You can also

program custom firings. Shown below are the heating rate,

temperature, and temperature hold time for each stored

program. (See “Theory of Operation,” next page, to learn

more about rate, temperature, and hold.)

Program 1: PMC Plus Fast

Heating rate per hour: Full

Temperature: 1650°F

Hold: 10 minutes

Program 2: PMC Plus Slow

Heating rate per hour: 1500°F

Temperature: 1470°F

Hold: 30 minutes

Program 3: PMC3 Slow

Heating rate per hour: 1500°F

Temperature: 1110°F

Hold: 45 minutes

Rate

Each segment must include a rate, which is degrees of

temperature change per hour.

Thekilnwillfireatfullpowerwhentherateis

1799°F/999°C. Full power displays as .

Note: To enter full power from , press the

key once.

Hold

Hold is the length of time that you want the kiln to remain

at the target temperature. Hold is also called soak or dwell

time. Hold maintains a steady temperature for the length of

time you specify. You can use Hold in both heating up and

cooling down segments.

When Hold is set to 99.59 hours, the controller will re-

main at that temperature indefinitely, until you press .

To enter a 99.59 hour Hold, press the once

from 00.00 during programming.

Note: During firing, the display shows Hold tem-

perature and time left in Hold.

Temperature Over-Shoot

When a kiln is heated too fast, it may over-shoot the target

temperature, especially in small kilns at lower temperatures.

To avoid this, add an extra segment in a User Defined pro-

gram to slow the firing.

User Defined

Programs

Theory of Operation

The temperature you are firing to is called the target tem-

perature. After the controller reaches the target tempera-

ture, it can also hold that temperature.

The controller fires at a controlled heating rate. The rate

is figured in degrees per hour. If you selected a rate of 100°

per hour, it would take 10 hours for the kiln to reach 1000°.

Rate is similar to “miles per hour.”

In summary, the controller does three basic tasks:

1) It fires at a controlled heating rate, or speed, measured

in degrees of temperature change per hour.

2) It fires to a target temperature.

3) It can hold the target temperature.

The controller fires in segments, or stages. A segment is a

given heating rate to a target temperature. Shown above is a

segment with a target temperature of 1250° and a rate of

625°, with a hold of one hour.

Heating rate is figured in degrees per hour. The recom-

mended heating rate for the material you are firing is usually

available from your supplier. It also varies depending on the

thickness of the material.

To figure how long a firing segment will take, subtract the

current temperature from the target temperature and divide

the resultant temperature by the heating rate. In the diagram

above, the firing time is 1250° - 80° (room temperature) =

1170 ÷625 = 1.87 hours.

The controller can fire up to 8 segments per firing in a

User Defined program. One segment is often all that is

needed, though.

After the controller has finished firing the last segment of

a User Defined program, it will turn off power to the kiln.

Note: If you enter a rate of 0000 in segment 1, or if

the target temperature in segment 1 is lower than

the current temperature, will appear in the

display.

User Defined

Programming

Instructions

Note: You have up to 8 segments available in a User

Defined program. If you don’t need all 8, zero out

the unused segments. See step 6 below.

From , press .

Press the key (not the

). When appears, press . (Ig-

nore - .)

will appear. Enter firing rate (temperature

change per hour) for segment 1. (1° = slowest rate.

1799°F/999°C = full power.) Then press .

or and the target temperature from the

last firing will appear. Use the arrow keys to change

the temperature. Then press .

andthe hold timefrom thelast firing willap-

pear (Example: 1 hour 10 minutes = 01.10). Use

the arrow keys to change the hold time. Then press

. (No hold = 00.00.)

Continue entering values for the segments needed.

When appears for the next segment that you

don’t need, select 0000. Then press . This

will zero out the remaining segments. (Example:

You need only 1 segment. When appears, en-

ter 0000.)

will appear. Press to begin firing.

will appear and the Run indicator light with

begin blinking. The kiln is now firing.

To stop a firing before completion, press .

will appear, alternating with kiln temperature.

Note: Do not be concerned if your kiln makes a

clicking sound during firing. Kilns use relays to

power the elements. The relays click each time their

electrical contacts come together.

Note: The kiln’s actual firing rate may be less than

the rate you programmed, depending on the kiln

model, available voltage, and density of load you are

firing.

When the kiln fires to completion, it will beep for 30 sec-

onds. The display will show the following:

IFiring time

IPresent temperature

I= Fired to completion

To return to , press .

Advanced

Features

Note: All the features in this section are available in

a User Defined program. The alarm is the only fea-

ture in this section that is available in a PMC pro-

gram. This is because PMC programs cannot be

altered.

Skip Segment

Skip Segment works only during a User Defined firing. It

jumps the firing from the current segment to the next one.

During firing, press the .

will appear.

Press . The current segment ramp or hold

number will appear.

Press again. (If you change your mind and

don’t want to skip that segment, don’t press

after appears. The firing will continue in the

same segment and the temperature will appear af-

ter one minute.)

Skip Segment skips to the ramp of the next segment from

either a ramp or hold of the current segment. (Skip Segment

does nothing during the final segment. To end the final seg-

ment, press .)

Skip Segment Example

You have pro-

grammed 1425°F for glass fusing, followed by a segment for

controlledcooling. Watchingthe glass throughthe peephole,

you notice that the glass edges have rounded nicely at 1315°.

Use Skip Segment to end the firing segment and to begin the

one for slow cooling.

Note: Make a note of the temperature at which the

glass fused. Program that temperature for the next

firing of that type of glass.

AddHoldTime

Add Hold Time works only during a User Defined firing.

It adds 5 minutes to a hold. It is designed for ceramists who

watch witness cones and for glass artists who inspect the

glass near the end of firing.

During a firing, press the repeatedly

until appears.

Press . The hold time for the current seg-

ment will appear.

Press the . Each time you press the

, the hold time will increase by 5 minutes.

Press .Thenormal temperaturewillappear.

Note: Add Time will add 5 minutes to a hold even if

no hold had been programmed.

Editing the Current Segment Target

Temperature During Firing

While the kiln is firing a User Defined program, you can

change the target temperature of the current segment. You

can edit only the segment that is firing. So if the first seg-

ment is the current one, you can edit only the first segment.

To edit other segments, wait until the firing has progressed

to those segments.

Even if the current segment has already started its hold

time, you can still edit the segment's target temperature. You

can raise or lower the target temperature. The controller will

go back out of hold and fire to the new target temperature at

the original rate. (You cannot edit the rate, however.)

During a firing, press the repeatedly un-

til appears.

Press . The target temperature for the current

segment will appear.

Use the arrow keys to changethe target temperature.

Press . The normal kiln temperature will ap-

pear.

The Alarm

The alarm works in both PMC and User Defined pro-

grams.

While the kiln is firing, you can set the alarm, which

sounds when the kiln reaches the alarm temperature. Use

the alarm to alert you to check the fusing or slumping of

glass.

You can enter only one alarm temperature at a time. How-

ever, after the alarm beeps, you can set the alarm for another

temperature, as many times as you want, during the firing.

Entering an alarm temperature automatically erases the pre-

vious alarm temperature.

Note: The alarm temperature that you set during a

firing must be higher than the current display

temperature.

During a firing, press the repeatedly un-

til appears.

Press . The current alarm temperature will

appear.

Use the arrow keys to changethe alarm temperature.

Press . The normal kiln temperature will ap-

pear.

To silence the alarm, press any key.

Analarm temperatureof32°F /0°C willturnoff thealarm.

Lost Wax Burnout

Caution: Only kilns with vent holes are designed

for lost wax burnout. However, you can use a kiln

without the vent hole provided that you open the

door ½” during venting.

Caution: Always use a wax tray.

Note: These instructions apply to injection wax that

melts at 200°F, not pattern waxes and plastics that

melt at higher temperatures. If smoke appears dur-

ing wax elimination, turn off the kiln. Smoking wax

means the kiln fired hotter than 300°/148°C.

Overview

Lost wax casting is the process of carving a shape in wax,

making a mold, and then casting that shape in metal. After

the wax has been carved, a mold is made of the wax shape.

The mold is a negative image of the wax. The wax is later

melted out of the mold through hollow channels called

sprues.

Lost wax burnout is the process of preparing a casting

mold for the melted metal that will be poured into it. The

steps in lost wax burnout:

Melt the wax from the mold.

Remove wax from the kiln before raising the temper-

ature higher than 300°F/148°C.

Harden the mold at high temperature.

Maintain the mold at the casting temperature recom-

mended for the type of metal that will be poured into

the mold.

Caution: Prevent wax or carbon from contacting

the kiln’s walls and elements. Carbon build-up in-

side a kiln ruins the interior. Carbon conducts elec-

tricity and causes elements to short circuit. Damage

to elements from contact with foreign materials is

not covered by warranty.

A Sample Program

Rate Temp.

Segment °F/°C °F/°C Hold

1 500/277 300/148 01.00

2 500/277 1350/732 01.00

3 450/250 800/426 02.00

Segment 1 heats the wax to 300°F/148°C and holds it for

one hour, allowing it to drip from the mold.

Segment 2 hardens the mold.

Segment 3 lowers temperature to 800°F/426°C, the typi-

cal casting temperature for silver. (Most types of gold cast at

900°F/482°C.)

Note: Casting temperature depends on the size of

the mold. The temperatures above are only a guide.

See your jewelry supply dealer for temperature

recommendations.

Burnout Instructions

Place a metal tray inside the kiln on three ½” posts.

Place the mold on a wire mesh screen on top of the

tray. The mold’s sprue hole should be down. The

tray will catch melting wax as it drips from the sprue

hole.

Keep the kiln’s vent hole(s), if any, open during wax

elimination. If the kiln has no vent hole, leave the

door open ½”. This allows fumes to escape from the

kiln. Heat the kiln to 300°F/148°C and hold it at that

temperature for at least one hour.

Note: Do NOT heat the wax above 300°F/148°C.

Hold at 300°F/148°C for at least one hour. During

this hour, the wax will melt from the mold and drip

into the tray. If the kiln gets hotter than

300°F/148°C, the wax may smoke and deposit car-

bon inside your kiln, causing expensive damage.

After one hour at 300°F/148°C, open the kiln. Re-

move the mold and wax tray. Pour the wax from the

tray and leave the tray out of the kiln until your next

wax elimination. (Do notleave the tray in thekiln!)

Heat the mold to the temperature recommended by

your jewelers’ supply house where you purchased

the mold material. This is usually around

1350°F/732°C.

Lower the temperature to the casting temperature

of the metal. Hold at that temperature until you are

ready to begin casting. Remove the mold with tongs.

Wear protective gloves and safety glasses.

Saving a Carbon-Damaged Kiln

If you follow the above directions, your kiln should be safe

from wax damage. In some cases, a small amount of carbon

may form on the walls over a period of time. This is due to the

burning of wax residue that was left in the mold. For this rea-

son we recommend that you periodically fire the kiln to

1500°F/815°C as follows:

Open the vent cover(s) or leave the door ajar ½”.

Fire the kiln empty to 1500°F/815°C at a rate of

300°F/166°C with a one hour hold (01.00).

Error Messages

bAdP / Bad Programming

The kiln will not fire the because the User Defined pro-

gram just entered has 1) a rate of 0000 in segment 1, or 2) the

target temperature in segment 1 is lower than the current

temperature.

EtH / Electronics Too Hot

The temperature of the electronic circuit board is above

185°F/85°C. This could damage the controller, so the firing

has been stopped. To prevent this, keep the firing room

cooler. Use better ventilation.

FaIL / Thermocouple Failure

The thermocouple, or temperature sensor, failed during

firing. Causes:

IDefective thermocouple or disconnected/loose wires

IDefective controller

IElectrical noise

Thermocouple Paperclip Test

Check the thermocouple wire

connections. (See your kiln in-

struction manual.) If connections

are tight, perform this test:

UNPLUG the kiln or disconnect the power. Re-

move the controller. Remove the two thermocouple

wires from the back of the controller.

Cut a thin paperclip in half. Insert a U-shaped

paperclip piece, or other piece of thin wire, where

you removed the thermocouple wires.

Plug in the kiln. If the controller displays room tem-

perature, replace the thermocouple. If it shows

, replace the controller.

tCR / Thermocouple Reversed

Thermocouple lead wires are reversed. Check that the

thermocouple lead wires are connected to the correct termi-

nals. See your kiln's wiring diagram.

FtL / Fired Too Long

This message appears when both of the following condi-

tions are met:

IThe temperature rise is less than 27°F/15°C per hour

IThe firing is 2 hours longer than programmed

See “Controller turns on. No heat in kiln,” page 11.

PF 1 / Power Failure

The power failed during a cooling segment, and the kiln

cooled past the target temperature while the power was off.

The kiln will not resume firing. To return to the dis-

play, press any key.

PF 2 / Power Failure

The power failed during firing and kiln temperature was

below 72°F / 40°C when the power came back on. The kiln

will not resume firing. To return to the display, press

any key.

PF 3 / Power Failure

The power failed during firing and temperature dropped

more than 180°F / 100°C by the time the powercame back on.

The kiln will not resume firing. To return to the dis-

play, press any key.

tC / Thermocouple Failure

The thermocouple failed during the display. See

the "paperclip" test under "FaIL," page 8.

tCL / Thermocouple Lag

The heating rate is slower than 9°F / 5°C per hour and the

kiln temperature is more than 100°F / 56°C away from the

programmed temperature. To return to the display,

press any key. Causes:

IOn kilns that use a portable controller, the thermocouple

fell out of the firing chamber.

IA bare spot on the thermocouple lead wires has touched a

grounded object inside the kiln switch box causing the

thermocouple to short out.

Iwill flash if you program a cooling segment tem-

perature that is below room temperature.

Check for worn or burned out elements, defective relays,

low voltage and defective thermocouple.

Calibrating the

Controller

You can calibrate the controller to fire up to 20°F/11°C

hotter or cooler than the zero factory setting.

From , press the key. After

rate, temperature, hold, etc., will appear.

With shown in the display, press the

key.

will appear. Press the arrow keys to change the

controller temperature. (Lower numbers include a

"-".)

Press the key to return to the display.

To fire the controller, press . will ap-

pear. Or to return to , press two more

times.

Selecting °F or °C

Display

The controller can display temperature in either °F or °C.

If your controller shows a small display dot in the lower right

corner of the display, the temperature shown is °C. No dot

means °F. To change temperature display:

UNPLUG kiln or disconnect power.

Remove the four screws that hold the controller to the

frontofthe kiln.Carefully removethecontroller from

the kiln. Leave wires attached to the controller.

Look at the back of the controller. You will find a set

of connector pins near the bottom labeled “C/F.”

When a jumper is placed on the C/F pins, the display

reads °F. When the jumper is removed, display reads

°C. Remove or insert the jumper as desired. (You can

purchase the jumper from a computer supply store if

necessary.)

Install the controller being careful not to jar compo-

nents on the back of the controller against the kiln

case.

The C/F jumper terminal is on the back of the controller, circled above.

Display Messages

The firing was stopped.

(Page 7) Ready for you to enter an alarm temperature.

When the kiln reaches that temperature, the alarm will sound.

During a User Defined firing, you can change the tar-

get temperature of a segment without having to first stop the

firing.

Fired to completion. If the kiln is already hotter than the

programmed target temperature when you begin firing,

will appear immediately after you begin firing.

(page 3) Delay is a count-down timer that starts the

kiln when the time runs out.

or (and temperature) (page 6) The target

temperature (the temperature that the kiln will fire to). Each seg-

ment in a User Defined program has a target temperature.

Full power firing rate. At this setting the kiln will fire at

its fastest rate. To select Full power, select a rate of

1799°F/999°C at the prompt in a User Defined program. A

fast way to do this is to press the key once from

. will appear.

(pages 5 & 6) Hold time of a segment, shown in hours

and minutes. (i.e. 2 hours 15 minutes = 02.15.)

(Page 7) During a User Defined firing, you can extend

the hold time to a segment without having to first stop the firing.

(page 3) The controller is ready for you to enter a pro-

gram or to begin a repeat firing.

Firing has begun. A moment after appears, you

will hear the relay(s) clicking.

, , , , (page 4)

These are PMC programs stored in memory.

(User Defined Program) (page 5) Select this option to

program a custom firing.

, , etc. (Rate) (page 6) This appears in User

Defined programming for each segment. 1, 2, etc. are segment

numbers. Enter the rate of temperature change for that seg-

ment. Rate is figured in degrees of temperature change per

hour. Example:

A temperature rise of 100° in two hours = 50° rate.

A temperature drop of 200° in one hour = 200° rate.

(Skip Step) (page 5) This message appears when you

press the key during a User Defined firing. If you press

the key again, the firing will skip to the next segment.

The firing was stopped by pressing .

The "Ready to Start" message appears after program-

ming a firing. Press to begin firing. Controller Calibration

(press the ) and Delay (press the )

are accessed from the message.

(Page 9) Calibrate the controller to fire hotter or

cooler.

Trouble Shooter

Problem: Controller display is blank.

No heat in kiln.

IIs the kiln connected to the power?

IHas the circuit breaker tripped or fuse blown?

IIs power reaching the wall receptacle?

Test with a voltmeter or test light if you are not sure.

IHas the kiln switch box ½ amp fuse blown?

The kiln’s ½ amp fuse is lo-

cated in the kiln switch box. Re-

move by pressing the fuse holder

and turning counter-clockwise

half a turn. Check the fuse by

placing the probes of an ohmme-

ter on the ends of the fuse. If the

ohmmeter reads less than an

ohm (digital meter) or reads 0

ohms (analog meter), the fuse is

okay. If the reading is OPEN (digital meter) or infinity/no

needle movement (analog meter), the fuse is bad. Replace-

ment fuse:

AGC 1/2 A 250V AC

IIs the controller receiving power? Test the power IN-

PUT connections on the back of the controller with a

voltmeter.

Controller Power Input Test

Unplug the kiln. Remove the 4

screws holding the controller

faceplate to the switch box. Lift

faceplate out of box and let the

board hang on the box with the

back of the board facing you.

Plug the kiln back in. Touch volt-

meter probes (in AC mode) to

both INPUT connections (the

white and orange wires).

Caution: Do not let the back of the board touch a

grounded object. Make sure the voltmeter is in the

AC mode when placing the probes on INPUT con-

nections.

Controller Power Input Test Result: No voltage

UNPLUG kiln. Check the switch box for disconnected

wires between the cord, transformer, and controller. If wir-

ing is okay, replace the transformer.

Controller Power Input Test Result: 20 - 24 volts AC

Correct current is reaching the board from the trans-

former. But since the board is not lighting up, it is probably

defective. Return the controller for repair or replacement.

Controller Power Input Test Result: less than 20 volts

Did you recently replace the transformer? It may be the

wrong voltage. The voltage is below 20, which is not enough

Indice

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