IR-2000 System

This vacuum system bakeout unit was developed to replace or eliminate cumbersome ovens and heater tapes used in high vacuum system bakeouts.

The heaters are small, high-power quartz lamps that operate on the inside of the vacuum system. These heaters utilize 100% of the radiant heat emitted by the lamps and can reach bakeout temperatures much faster than ovens or tapes. The internal heat sources reduce the bakeout time required to reach base pressure. The heater elements are securely mounted on standard conflat flanges. Care should be taken not to touch, damage, or coat the lamp, as this could reduce its high heating efficiency.

The IR-2000 system INTERNAL HEATER employs two separately mounted quartz lamps, each on a separate flange, designed for use inside a vacuum chamber to outgas the system. WARNING: When in operation for long periods, enough heat is generated inside the vacuum chamber that it can cause painful burns if touched. Care must be exercised to prevent anyone from touching the chamber and causing burns or discomfort.

Setup:

The IR-2000 INTERNAL HEATER is shipped ready for immediate use. However, the lamp itself is demounted and separately packaged to prevent damage during shipment.

1. Carefully unwrap the quartz bulb. Do not touch the glass portion of the bulb when installing it, as fingerprints can cause early bulb failure or diminished heating, and lead to unwanted outgassing.
2. Deflect the upper bulb holder to insert the bulb and prevent the ceramic ends of the quartz bulb from chipping.
3. Install the bulb and holder in a 2-3/4″ OD (CF38) flange on the system. Ensure it clears and does not interfere with any equipment inside the vacuum system.
4. Install the control unit in a rack panel or place it in an unobstructed location.
5. Connect the two power leads to the feedthroughs for the heater unit.
6. The IR-2000 INTERNAL HEATER unit is now ready to operate. It requires ~12 amperes when both bulbs are in use.
7. With the vacuum pumping system in operation, turn the “Time” knob to the desired time for heating the system. The exact time depends on the outgassing required for system operation. The timer can be set for 1-12 hours. For periods less than 2 hours, turn the timer past 2, then back to the desired time.
8. Turn the power knob well past the desired intensity, then adjust the power for heating. Full power will reduce the time required to outgas the vacuum system. As the system warms up and outgasses, the base pressure of the system will increase.
9. After the timer shuts off, continue pumping as the system cools down. After cooling, the vacuum system is ready for use.
10. Additional heating cycles may be needed to fully outgas the vacuum system and reach the base pressure required, especially the first time a system is used. The quartz lamp is rated for 180 hours of service. Note that rough handling or severe operating conditions may reduce the lamp's service life.
11. Consult the supplied User’s manual for more information.

Specifications:

• Power: 115 VAC, 60 Hz, 1200 W (with dual bulbs)
• Standard Dimensions: Heater unit mounting space – 1.5″ diameter x 5.4″ long – See drawing
• Custom applications available
• High heat 1000 Watt IR Bakeout System
• Heater Arrays
• Rack Mount Controls: 3-1/2″ High x 19″ wide
• Materials: 304 Stainless steel flange, OFHC Copper rods, Quartz lamp glass (enclosed)
• Mounting Flanges: 2 Conflat 2-3/4″ OD
• Temperature in 10^-8 torr vacuum at full power (using one bulb – measurement point: small piece of SS with thermocouple attached)

Temperature Measurements: