Gebruiksaanwijzing /service van het product Sentry 2.0 van de fabrikant Sentry Industries
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1 Sentry 2.0 Digital Temperature Controller Complete Operating Instructions See pages 28-29 for instructions on upgrading your DTC 100, 600, 800 or 1000 series board to the Sentry. Delay (pg 6) From IdLE, press 3. Enter time in hours:minutes. Delays the start of firing.
2 Introduction Thank you for purchasing the Sentry micro processor, our most advanced generation of digi - tal temperature controllers. The easiest way to learn to operate the Sentry is to sit down in front of it with these instructions and play with it.
3 Contents Basic Pointers . . . . . . . . . . 4 Which Instructions Apply to Your Controller . . . . . . . . . . 4 Room Temperature and Humidity . . . 4 Thunder Storms and Power Surges . 4 Display Lights . . . . . . . . . . . . . . . . . . 5 How to Get IdLE to Display .
Safety The warranty on your Sentry 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 end of the firing. Follow these safety rules in addition to the ones in your kiln or furnace manual.
Display Lights Single Center Light: Time A lower center dot appears during time display. It sepa - rates hours from minutes (i.e. 1 hour, 30 minutes displays as 01.30). During temperature display, the dot disappears. Power Output Lights The Sentry turns on the heating elements intermittently through relays.
Chapter 2 The Keys Correcting Entries If you enter the wrong temperature, cone, time, etc., while programming, enter 0000. Then enter the correct numbers before pressing ENTER . See also the Stop/Back Key, page 7. 1 / Cone Fire Cone-Fire is a method of firing ceramics to a pyrometric cone.
Setting Alarm From Idle 1 From IdLE , press 7 . ALAR will appear alternating with the last alarm temperature entered. 2 Enter alarm temperature. Press ENTER . IdLE will appear. (Enter 0000 to turn alarm off.) Note: 9999 , as an alarm temperature, automati - cally changes to the maximum temperature rating of your controller.
Chapter 3 Cone-Fire Cone-Fire mode is based on pyrometric cones. It is not designed for heat treating, glass fusing and enameling. For these firings, see “Ramp-Hold,” page 12. Use Ramp-Hold to fire ceramic pieces that require a custom firing schedule, such as some types of stone - ware sculpture or crystalline glaze.
Low Fire Cones 022 - 011 This range includes decals, over-decorations, lusters, and golds. The firing can be fast. Good venting is important, because oils and other organics burn off. Do not close the lid from the vented position until all odor has disappeared.
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.
Watch the pyrometric witness cones through the peep - hole. Press STOP when the correct witness cone bends, not - ing how much Hold time was needed. Program that much Hold time the next time you fire the same type of ware loaded to the same capacity. Note: During Hold, the display temperature will alternate with time left in Hold.
Chapter 4 Ramp-Hold Definition of a Segment Ramp-Hold fires in segments. Every segment must have a target temperature and a heating rate to reach that temper - ature. Shown in diagram A is a segment with a temperature of 750°. Rate is figured in degrees per hour.
User Programs (USER) When you enter Ramp-Hold mode, the first prompt to ap - pear is USER , meaning, “Select one of your programs.” You, the user, can make your own firing schedules and store them in memory. A firing schedule, or program, is the seg - ments needed for a firing.
Firing a Stored User Program To use a stored program, press 4 from IdLE. Enter the program number at the USER prompt. Press ENTER .I f there are no changes to the program, press STOP . IdLE will appear. The controller is ready to fire your selected program.
If you are not using a kiln vent, leave peephole plugs out and vent the lid. Set the alarm to 1000°F. When the alarm sounds, close the lid from venting position. Set the alarm again, this time to 1850° F. When it sounds, check the witness cone through the peephole.
Chapter 5 Multiple Zone Kilns Note: See also Multiple Zone Options, page 21. An Overview of Multiple Zone Firing If you are not sure how many zones your kiln has, look into the firing chamber. The number of thermocouple tips indi - cates the number of zones.
Chapter 6 Options The Options key gives you access to a list of features. With each press of the Options key, you will see the display code for the next option. 1 When you find the option you want to use, press ENTER . 2 Use the 1 and 2 keys to select changes within the op - tion.
I Place witness cones in several locations in the kiln. How to Use Cone Offset Cone Offset changes the shut-off point of the cone by the degrees of temperature shown in the chart below. 1 From IdLE , press OPTIONS until OFST appears. 2 Press ENTER . The current Cone Offset adjustment number will appear.
Calibrating Thermocouple Offset With a Digital Pyrometer You can calibrate Thermocouple Offset using a cali - brated digital pyrometer. One way to calibrate your pyrome - ter is to take it to a heat treater or other location that has a cal - ibrated controller you can trust.
AOP Outlet (AOP) Select Vent Fan or Alarm for the Auxiliary Output The optional “AOP” (Auxiliary Output) is an electrical receptacle mounted in the kiln’s switch box. This outlet can power a kiln vent or an external alarm, such as a bell. The AOP is a special-order option that might not be on your kiln.
Configuration Code (CFG) Information for Technicians From IdLE , press OPTIONS repeatedly until CFG ap - pears. Press ENTER . The factory configuration code will ap - pear. Press ENTER . Press STOP to return to IdLE . The configuration code can be changed only at the factory.
Chapter 7 Error Messages I Error messages are accompanied by an alarm. I Non-interrupting messages do not stop the firing. Ter - minating error messages do. I FTC, FTH, LTdE, and HTdE error messages are based upon the setting in the Temperature Deviation (TEdE) option.
How the Sentry Handles Power Failures The Sentry handles a power failure in two ways: 1 After a brief power failure, the controller continues firing as before. It shows a normal temperature dis - play alternating with PF . 2 After an extended power failure, PF 2 or PF 3 will appear.
24 Appendix A: Display Messages AbRT Abort 6 The firing was stopped. ALAR Alarm 6, 10, 13 - 15, 20, 22 ALAR appears either when you are entering an alarm tempera - ture or when the alarm is sounding during a firing. To stop an alarm, press any key except STOP.
25 IdLE Ready to Begin 5 The Sentry must display the IdLE message before you can begin firing or programming. LId Lid is Open 5 When LId appears, the kiln is equipped with a lid safety switch, and the lid (or door) is open during firing. Or a two-pin connector on the back of the board is missing.
26 Appendix B: Preset Standard Cone-Fire Schedules - °F These are the firing schedules programmed in Cone-Fire mode. To customize a schedule, write down your changes. Then load your new schedule into Ramp-Hold. Low Fire Cones °F Segment 1 Segment 2 Cone Rate 1 Temp.
27 Appendix B: Preset Standard Cone-Fire Schedules - °C These are the firing schedules programmed in Cone-Fire mode. To customize a schedule, write down your changes. Then load your new schedule into Ramp-Hold. Low Fire Cones °C Segment 1 Segment 2 Cone Rate 1 Temp.
1 Unplug the kiln or disconnect the power. Remove the 4 screws holding the controller faceplate to the switch box. Gently remove the old controller. 2 Disconnect the wires from the old controller.
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30 Appendix D: Temperature Equivalents For Orton Self-Supporting Pyrometric Cones °F Cone Self-Supporting Cones Pre-Fire Number Color Heated at: 27° F 108° F 270° F Per Hour* Per Hour* Per Hour* 0.
31 Sentry Ramp-Hold Shorthand Instructions After you press the keys in the left column, the message to the right will appear. KEYS TO PRESS DISPLAY COMMENTS PROGRAM AND FIRE THE KILN. Apply power to kiln IdLE Press Enter if IdLE does not appear. 4 USER Enter program number.
32 Sentry Cone-Fire Shorthand Programming After you press the key(s) in the left column, the message to the right will appear. Press 1 from IdLE .I ft h e 1 key does not re - spond, your controller does not have Cone-Fire. KEYS TO PRESS DISPLAY COMMENTS Apply power to kiln IdLE Press Enter if IdLE doesn’t appear.
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