Single-Speed / Ramp-Hold Version Sentry Xpress Digital Temperature Controller °F °C °C Display Dot Temperature Display Temperature display is in °F. Tem- perature display is in °C. See page 13 for instructions on selecting °F or °C. START/STOP Key Time Display : Sepa- programming step.
The easiest way to learn to operate your controller is to read this manual while you are sitting in front of your kiln. Press the keys as you read the instructions. Do not worry if you hear a clicking noise during operation.
The warranty on your Sentry Xpress 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. When the kiln is not in use, disconnect the power.
A Rapid Way to Scroll Numbers During programming, hold an arrow key down several seconds, and numbers will begin to scroll rapidly. Ordi- narily, you would press 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.
Operation The temperature you are firing to is called the target temperature. After the controller reaches the target tem- perature, 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°.
Mode You can make your own firing programs and store them in the controller’s memory. A firing program tells the kiln how fast to fire, and to what temperature. The simplest pro- gram is one segment. You can use up to 8 segments with your controller in Ramp-Hold mode.
Ramp-Hold Programming Instructions Note: You have up to 8 segments available in Ramp-Hold. If you don’t need all 8, zero out the unused segments. (See step 6 below.) From , press Press the key (not the Ramp-Hold programs. When the one you want appears, press will appear.
Editing the Target Temperature While the kiln is firing, you can change the target tem- perature of the current segment. (Ramp-Hold: You can edit only the segment that is firing. So if the first segment 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...
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.
are Ramp-Hold programs stored in memory. etc. (Rate) (page 8) This appears in Ramp-Hold programming for each segment. 1, 2, etc. are segment numbers. Enter the rate of temper- ature change for that segment. Rate is figured in de- grees of temperature change per hour. Example: A temperature rise of 100°...
FE Error Messages FE 1 Memory Read/Write Failure FE 2 RAM Failure FE 3 OEM Factory Data Corruption FE 4 Thermocouple “Noise” FE 5 Software Error To return to from an FE code Try pressing any key. If that doesn’t work, turn the power off for 10 seconds.
°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.
(in AC mode) to both INPUT connections (the white and orange wires). (See photo on previous page.) 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 connections. Controller Power Input Test Result: No voltage UNPLUG kiln.
Problem: Kiln switch box ½ amp fuses keep blowing. What size fuse are you using? Correct fuse: AGC ½ A 250V AC If the fuse is the correct size, perform the following test: Kiln Switch Box ½ Amp Fuse Power Test UNPLUG the kiln/disconnect the power.
These instructions may be confusing until you have read more detailed instructions on Single-Speed, page 6, or Ramp-Hold, page 8. Read the safety guidelines, page 3. After pressing the keys in left column, the center message will appear. Keys to Press (Not Down Arrow) Select rate Enter temperature Enter hold time...