|DCA||DCA Additional Dryer Chamber. Adds one heating chamber with lamp elements in the top row only. Adds 0.762 m (30 inches) to length of furnace. Option available on most furnaces.|
|DGO||DGO or Dual Gas Operation. Allows for dual gas operation for efficient use of primary process gas (Gas 2) in the furnace, minimizing consumption with a second gas for cooling and evacuation (Gas 1). Gas 2 is supplied only to oxygen-controlled process areas (heating chamber), while Gas 1 is supplied to entrance and exit baffles, transition tunnels, lamp plenums, eductors and cooling. Common Process Gas combinations include:|
Gas 1: N2 Gas 2: FG
Note this is similar to NO Operation except with FGO supplies GAS 2, primary gas is only supplied to the furnace chamber. Requires HC, standard on some furnaces, option available on most furnaces.
|DOCM||Furnace Owner’s Manual. Installation, startup operating, and troubleshooting instructions for a specific furnace. Includes specific customer drawings, schematics and engineering calculations. Standard on all furnaces.|
|DOCR||Furnace Reference Manual. Continuous Belt IR Furnace Reference Manual including information on IR furnace nomenclature, thermal processing; furnace control and software; maintenance, troubleshooting and calibration; and process engineering. Standard on all furnaces.|
|DSC||3-Phase Safety Disconnect: On-board circuit breaker to meet local codes or customer requirements. Disconnects furnace power distribution system (all on-board electrical components and wiring) from facility 3-phase power lines. Lockable for safety. Option available on most furnaces.|
|EH||Edge Heat: Edge heat elements allow trim of the furnace for a precise and uniform temperature profile across the belt width. EH serves to compensate for heat loss at the edges of the belt, through the chamber sides and through the ends of the lamps that would otherwise cause a drop in temperature at the outer edges of the belt. The power levels in the left and right edge heaters can be adjusted to vary the proportion of energy delivered by the left and right elements. Each side can be varied from 0% to 100% power. When properly trimmed, typical temperature deviations across the belt can be held to a minimum for profiles with modest temperature differences between adjacent zones. |
Standard on 24, 36 and 48 (nominal belt width, inches) model furnaces, option available on most furnaces.
|EM||Element Monitors: Adds circuitry and special programming to sense and alert on failed heating lamps. Signals the operator audibly and visually via the OI should a failure occur. The failure display indicates the failed lamp location, allowing the operator to quickly discern location and process affected, if any. Option available for most furnaces. Recommended on furnaces with plenum covers (see HC).|
|EME||Entrance Emergency Machine Off, Vertical Mount. Two (2) SEMI approved 40 mm diameter emergency shutoff buttons are located on either side of the entrance on the vertical face of the furnace approximately 1.27 m (50 inches) above grade. Standard on all furnaces.|
|EMT||Entrance Emergency Machine Off, Top Mount. Two (2) SEMI approved 40 mm diameter emergency shutoff buttons located at the entrance on the horizontal surface of the furnace load area approximately 0.94 m (37 inches) above grade, or on top of the furnace 1.5 m (64.5 inches) above grade, or at customer specified location. No cost option replaces EME, if specified at time of order.|
|EMX||Exit Emergency Machine Off, Vertical Mount. Two (2) SEMI approved 40 mm diameter emergency shutoff buttons are located on either side of the exit on the vertical face of the furnace approximately 1.27 m (50 inches) above grade. Standard on all furnaces.|
|ENG||English Units of Measure or US customary units. Furnace control software shall depict belt speed in inches per minute (in/min), gas flow in standard cubic feet per hour (scfh). Temperature units shall be degrees Celcius (°C). Standard on all furnaces unless SI is selected at time of order.|
|ETM||Elapsed Time Meter. Adds a mechanical meter to keep track of the cumulative time the furnace is ON. Standard on all furnaces.|