Sentry Industries Sentry 2.0 operating instructions Cone-Fire Programming, Hold HOLd, Mirror Test

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Vent the kiln until moisture no lon- ger fogs a mirror.

Cone-Fire Programming

Use these instructions for your first firings. Later you may prefer “Cone-Fire Shorthand Pro- gramming,” page 32.

As the Sentry prompts for cone, speed, pre-heat, hold, and slow cooling, values entered for the last firing will appear. To use these values again, press ENTER.

To fire without Delay or Alarm: Follow steps 1 through 7 below. Then from IdLE press START. To use Delay or Alarm, see also page 6.

1 Apply power to the kiln. 8888 then IdLE will appear. (Press ENTER if IdLE does not appear.)

2Press 1. CONE will appear. Enter cone num- ber. (If the 1 key does not respond, your con- troller uses Ramp-Hold only.)

3Press ENTER. SPd will appear. Enter speed: FAST (1), MEDIUM (2), SLOW (3). (Me- dium speed will display as Std .)

4Press ENTER. PRHT will appear. To use Pre-Heat, enter time. Otherwise enter 0.

5Press ENTER. HOLd will appear. To soak the ware at the end of firing, enter a hold time. Otherwise enter 0.

6Press ENTER. COOL will appear. To use Slow Cooling, enter cooling rate as degrees per hour. (180°F/82°C is maximum rate. Press 0 to turn Slow Cooling off.)

7Press ENTER. IdLE will appear.

8TosetAlarm: Press 7. ALAR will appear. En- ter alarm temperature. (Press 0to turn alarm off.) Then press ENTER.

9To set Delay:Press 3. dELA will appear. En- ter delay time. Press ENTER. (Delay zeroes out after each firing.)

10To start program, press ENTER once. STRT will appear, then temperature. If

Delay was programmed, DELA will appear, then time remaining until start. To stop the program during firing, press STOP.

When program fires to completion, CPLT will ap- pear. Press ENTER. IdLE will appear. To shut off the alarm when it sounds during a firing, press ENTER.

Mirror Test

This test will help you de- termine how much Pre-Heat to use. Occasionally during Pre-Heat, hold a mirror near the top peephole. (Be careful to avoid burns.) The mirror must be at room tempera- ture, not hot, so hold it near the peephole for only several seconds.

If the mirror fogs, mois- ture is still escaping from the

ware. When the mirror no longer fogs, you can exit Pre-Heat and begin the firing.

To interrupt Pre-Heat and begin firing to the cone in Cone-Fire, press 9(Skip Segment). SKIP , alternating with

1, will appear. Press ENTER. Segment 1 of the firing will now begin. (See Cone-Fire firing schedules, page 9.)

Note: If you are using a vent fan, such as the Orton KilnVent, turn the fan on during Pre-Heat. The fan will help to remove moisture. (AOP Fan users: see the Fan option, page 18.)

How to Use Pre-Heat When Kiln is Above 200°F/93°C at Beginning of Firing

If you begin firing with Pre-Heat in a kiln that is already hotter than Pre-Heat temperature, the kiln will skip Pre-Heat and begin firing to the cone. There are two ways to use Pre-Heat in this situation:

■Wait until the kiln cools below 200°F before starting the firing. This is the preferred method.

■Load the kiln and start the firing, but include enough time in Delay for the kiln to cool below 200°F before Pre-Heat begins.

Hold (HOLd)

Cone-Fire Hold heat-soaks the ware at the cone tempera- ture at the end of the firing. Without Hold, the kiln shuts off after it reaches the cone temperature. Hold maintains the cone temperature for the period you specify. Hold helps even out the temperature throughout the kiln. It also helps the heat to penetrate completely into the clay. (Rapid firing is like cooking: the turkey will be done on the outside but not on the inside.) Hold helps glaze absorb china paint. It helps to heal glaze defects such as bubbles. A little hold time can yield dramatic results.

CAUTION: Too much hold time can overfire your ware and burn out colors.

One way to add Hold time without over-firing is to fire to one cone cooler than needed. Then add enough hold time to bend the next hotter cone. Hold time needed to bend the next cone will vary. As a rule of thumb, 45 - 60 minutes of hold = one cone of heat work.

Example: to fire to cone 05, program Cone-Fire for 06 and add 45-60 minutes of hold time.

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Contents Standard Options Multiple Zone OptionsIntroduction Contents Thunder Storms and Power Surges SafetyRoom Temperature and Humidity Basic PointersFiring Completion Message How to Get IdLE to DisplayDisplay Lights Repeat FiringsKeys Options Key Cone Numbers Skip SegmentEnter/Start Stop/Back KeyPyrometric Witness Cones How to Position Cones on the ShelfCone-Fire Firing SchedulesSpeed SPd Cone-Fire FeaturesPre-Heat Prht Hold HOLd Cone-Fire ProgrammingMirror Test For Kilns with AOP Outlet When the Kiln Shuts Off Too SoonSlow Cooling Cool Wrong Thermocouple TypeRamp-Hold Definition of a SegmentRamp-Hold Programming User Programs UserAOP Fan Firing a Stored User ProgramRate Segments for Controlled CoolingGlass Slumping Firing Schedule Glass Fusing Firing ScheduleStarting a Firing in a Hot Kiln Ceramic FiringsMultiple Zone Kilns Cone-Fire Speed Spd OptionsCone-Fire Options Cone Offset OfstFan FAN General OptionsThermocouple Offset Tcos Selecting F or C CHG Thermocouple Type TCElectronics Temperature Elec Temperature Deviation TedeMaximum Temperature Sfty AOP Outlet AOPMultiple Zone Options Non-Interrupting Error Messages Error MessagesTerminating Error Messages TCdE / Uneven Multiple Zone Temperatures How the Sentry Handles Power FailuresPlog Error Codes TCR / Thermocouple Leads ReversedAppendix a Display Messages Reset Power FailureDiagnostic Test Failure SafetySegment Low Fire Cones FCone Rate 1 Temp Rate 2 Temp Appendix B Preset Standard Cone-Fire Schedules C Low Fire Cones CAppendix C Upgrading Instructions Upgrading the DTC 100, 600, 800 & 1000 to the SentryPage 010 Cone Self-Supporting Cones Pre-Fire Number Color022 05 1/2Sentry Ramp-Hold Shorthand Instructions Appendix EKiln is now firing. Use Program Review by pressing Sentry Cone-Fire Shorthand Programming Appendix FKiln is now firing to the cone you selected

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