Scattered around the Oven are lots of Thermocouples, or TCs, which read temperature. TCs are thin metal tubes with two special metal wires inside that are joined at the tip of the tube. It is filled with an insulating powder. Each TC has a color-coded connector on the end with three pins. Our normal type-N TCs are orange. Each TC is plugged into a special gold or orange TC Connector Cable which is designated by a four-digit DNTX number. DNTX stands for DCU (0-5), DCU card Number (0-5), TIC select number (0-3), and channel (X) on the TIC (0-4). Not every possible DNTX (or PFE) number is currently in use. The Connector Cable connects each TC to its Isothermal Junction Box, or IJB. Each IJB is a copper block with ten TC junctions and two thermistors attached to it, thermally isolated in a foam-rubber filled box. Each IJB is serviced by two TICs, whose DNT numbers are emblazoned on the cover of the box. The TICs live in seven Temperature Instrumentation Panels, or TIPs. Information from the TICs is directed through six Data Conversion Units, DCU 0-5, to the on-board computers.
The Oven is propelled around by two independent Drive systems, Drive 1 and Drive 2. Each Drive consists of a 40 horsepower motor, the electrical system to start and protect them, a gearbox, and pinion gear. Both Drives are controlled by the Rotation Control Panel
There are three computers which live aboard the oven to read and process temperature information, and to control the heaters. They are CPU0, CPU1, and CPU2. Besides sending instructions to the Power Panels to switch Heaters on and off, they also check to see what the Voltage (adcV), and Current draw (adcC), are for each Fase, and the current on the Neutral (adcN), of each Power Panel. In addition, the CPU sisters communicate with the two Control Room Computers, Crater and Dorado, which store data and serve as interface with you, the Oven Pilot.
There are ports for four Video Cameras in the Cone at 70, 100, 215, and 340 degrees (not all cameras may be installed at any given time). Lights for the Video are mounted in the walls at 85, 175, 265, and 355 degrees. Each of the Shells Heaters Twistlock cable drops from its Junction Box to one of the main beams where they plug into their assigned Twistlock receptacles. These are numbered for our convenience, so a Heater has a Beam and Twistlock number to describe where it plugs in. For example: our friend Heater 108 has Beam 090, Twistlock 19 as a home. In the Hearth, each Heater circuit may connect to either the Primary (PRI) heater coil, or the Anneal (ANL) coil. This choice is made by changing the Twistlock cable which comes from the beam receptacle to one of two marked receptacles on the appropriate transition box. These boxes are hung on unistrut rails between the beams.
All of the information from the Shell IJBs and the Heater RCSs comes down the thick black cables with braided sheaths to plug into their appropriate transition boxes, and hence to the TICs and PPs.
The Oven electronics are arrayed around the carousel at ground level (Z=-60), with the Power Panels from Theta = 40 to 160 degrees, the access door into the pedestal at 180 deg., Rotation Control Panel at 200 deg., Temperature Instrumentation Panels from Theta = 220 to 310 deg., Interface Panel at 320 deg., CPU2 at 340 deg., CPU1 at 350 deg., and CPU0 at 10 degrees. All of these Panels shall be clearly marked.
Inside the access door there is the Pedestal, upon which is borne the entire Oven structure. There is a large crossed-roller bearing atop the Pedestal, the bottom race of which is toothed on the outside. The Drives turn their Pinion Gears around this ring. Emerging from the floor outside the Pedestal are nine large conduits which carry the power through the Pedestal walls to the nine sets of Sliprings, which are stacked on a shaft along the Ovens rotation axis. Below the large Power Sliprings (deep in the pit) are two sets of much smaller sliprings which carry low voltage housekeeping power, and information. At the bottom of the pit there is also a sump pump... just in case.