Sentry Industries Sentry 2.0 Ready to Begin, Lid is Open, Program Lock, Cone Offset, Pre-Heat

Message	Definition	Page Reference
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.

LOCK Program Lock 20

With this option activated, a stored program cannot be altered or removed from memory.

LTdE Low Temperature Deviation 22

This message appears when the kiln is below the Temperature Deviation setting in the TEDE option.

OFST Cone Offset 17

Adjust a Cone-Fire program to bend the matching witness cone on the kiln shelf.

PF 2 Power Failure 22, 23

The power failed. When power came back on, the temperature was below 212￿F/100￿C.

PF 3 Power Failure 22, 23

The power failed near the end of a firing.

PF Power Failure 22, 23

There was a power failure during firing. The kiln continued firing after power came back on.

PLOG	Diagnostic Test Failure 23
PRHT	Pre-Heat	9, 10

In a Cone-Fire program, Pre-Heat heats the ware slowly to 200￿F/93￿C for the length of time you specify. Pre-Heat is de- signed to remove moisture safely from greenware.

RA 1 Rate 13

RA 1, RA 2, RA 3, etc., appears in Ramp-Hold programming, Pro- gram Review, and Present Status. When RA 1, 2, 3, etc. appear during programming, the controller is asking you for firing rate for each segment. Rate means how fast the firing progresses, in de- grees of temperature per hour. Every segment must have a firing rate. The number after RA is the segment number. Each segment in a Ramp-Hold firing is numbered, starting with 1. Program Re- view shows firing rate after RA 1, 2, 3, etc. In Present Status, RA 1, 2, 3, etc. means the segment that the firing is in at that moment.

RST Reset 21

The RST option erases cone and thermocouple offsets, selects ￿F operation, erases stored programs in Ramp-Hold, and se- lects Type-S thermocouple. Note that if you use Reset, and your kiln is equipped with a Type-K thermocouple, you must use the TC option to select Type-K. (Reset selects Type-S as a safety precaution. If you had a Type-S thermocouple and Reset se- lected Type-K, your kiln would overfire. On the other hand, if you have a Type-K thermocouple, Type-S selected would underfire your kiln. The type K thermocouple is standard on most kilns.)

S 20 Slow Speed 17

Cone-Fire slow speed shows in Program Review as S 20. This is also how slow speed is listed in the SPd Speed option.

SFTY Safety 20

This is the maximum temperature the Sentry is programmed for your kiln. It can be altered only at the factory.

Message	Definition	Page Reference
SKIP	Skip Segment	7

If you press the Skip Segment key during a firing, SKIP will ap- pear. If you press the key again, the firing will skip to the next seg- ment.In Cone-Fire, Skip Segment takes you only out of Pre-Heat or Hold.

SLOW Slow Speed 10

In Cone-Fire programming, if you press ENTER when SLOW ap- pears, the kiln will program to fire at slow speed.

SOFT Software Version 21

This option gives the version of software loaded into your Sentry.

SPd Speed 10, 17

The SPd message appears during Cone-Fire programming and in Options. In the SPd option, accessed through the option key, change the speed of a Cone-Fire program beyond the standard fast, medium or slow. While programming a firing for Cone-Fire, choose slow, medium or fast speed at the SPd prompt.

STd Standard Speed 17

Cone-Fire medium speed appears in the Sentry as STd, or Stan- dard. This is because medium speed is the standard firing pro- gram used in Cone-Fire. Fast and Slow speeds alter the stan- dard firing program.

STRT Firing Started 10, 13

This appears when firing begins. Do not be concerned if it takes a moment for the relays to turn on. The Sentry is processing data.

T123 Zone Temperatures 21

This option shows temperatures in each zone.

TC Thermocouple Type 19

Choose between types K, S, or R thermocouple. It is important to select the correct type, or the controller will not read temperature accurately.

TcdE Uneven Temperature 23

This is an error message for multiple zone kilns. It means the tem- peratures of the zones are out of balance. This is usually caused by a miswired kiln or by a defective relay.

TCOS Thermocouple Offset 18

Calibrate the controller’s temperature. This compensates for temperature drift, or aging, of a thermocouple.

TCR	Thermocouple Reversed	23
The thermocouple wires are reversed.
TEDE	Temperature Deviation	20

The Sentry includes error messages to warn you that the kiln is not maintaining the programmed temperature. The sensitivity of the error messages is based on a temperature entered in the TEDE option.

TEST Element Test 21

This option is for testing the elements and thermocouples. If you test a thermocouple with a lighter, the temperature display re- sponds faster during Test than during IdLE display.

USER User Program 13, 14

In Ramp-Hold programming, the USER prompt is asking you where you want to place the program in memory. The Sentry has four spaces in memory: 1, 2, 3, 4. Keep a record, on paper, of the programs in memory.

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