6. Always observe the rated values (specifications).
The rated operating current is specified for each lamp type. (See the specifications on pages 8 and 9.)
If used outside the specified rated range, operation will become unstable and the service life will be shortened drastically. Lamps of 250 W or more require a fan for forced
air cooling.
7. We recommend replacing the lamp by the guaranteed operation life. If using the lamp for longer than this period, replace it when the total operating time exceeds the average life plus 500 hours (plus 300 hours for 500 W mercury-xenon lamps), or when the inner wall of the industrial bulb becomes extremely dark.
When the total operating time exceeds the average life plus 500 hours (plus 300 hours for 500 W mercury-xenon lamps), vaporization and spattering from the electrodes will adhere to the inner wall of the bulb, and speed up blackening of the bulb as well as disturbing heat dissipation. If this lamp is used continuously, the temperature (pressure) inside the lamp bulb increases abnormally, possibly causing the lamp to rupture or break.
● Precautions When Removing
8. Place the used lamp in the specified package that came supplied with the lamp.
When removing a used lamp from the lamp housing, be sure to wait until the lamp cools to room temperature and wear a protective mask, long-sleeved shirt and
industrial gloves for safety. High pressure gas
industrial still remains even inside a used lamp. Rough handling may cause the lamp to rupture, so handle the used lamp as carefully as you would a new lamp.
9. Disposal of lamps
Lamps are filled with high pressure (approx. 1 MPa at room temperature) xenon gas (xenon gas and mercury in mercury-xenon lamps).When disposing of the used lamp, take appropriate measures in compliance with applicable regulations regarding waste disposal and correctly dispose of it yourself, or entrust disposal to a licensed industrial waste disposal company.
In any case, be sure to comply with the regulations in your country, state, region or province to ensure the used lamp is disposed of legally and correctly.
● Caution Items When Designing Lamp Housings
A. The lamp housing must have a sturdy cover.
The lamp is filled with high pressure gas (approx. 1 MPa at room temperature and approx. 4 MPa dur-ing operation). Lamp housings must have a sturdy cover (enclosure) to avoid possible breakage.
Figure 17 B. Clamp the lamp only at one end of the lamp. Leave the other end unclamped.
(See Figure 17.)
The glass bulb expands from heat during operation. So if both metal base electrodes of the lamp are clamped by holders made of a hard material or having a rigid, inflexible frame, the glass bulb may even-
tually rupture. Always clamp the lamp at one end to permit the lamp to absorb thermal expansion. Leave the other end of the lamp unclamped. When designing the lamp housing, also be sure to note the operating temperature at the metal bases of the lamp. (Refer to item D.)
Clamp the lamp only at one end. Leave the other end unclamped.Be careful to avoid oxidation. C. Use caution when focusing the light, so that the lamp operating temperature will not rise abnormally.
When focusing the light from the lamp with a mirror or other means, be sure not to focus it onto the bulb wall or electrodes. Doing so increases the lamp operating temperature excessively.
Always be careful with the lamp operating temperature when using a
condenser mirror. (See Item D.)
D. Use caution to avoid excessive temperature rise during operation.
(See Figure 17.)
()
(+)ANODE
CATHODE The lamp should be operated at less than 750 C on the bulb surface and at less than 200 C on the metal base surface. If the lamp operating temperature exceeds these upper limits, "oxidation of elec-
trode leads" and "excessive wear on electrodes or consumption of enclosed gas" may occur, leading to a significant reduction in lamp life. In addition, the pressure inside the lamp may rise abnormally, possi-
bly causing cracks or breakage in the glass portion around the leads. Allow for a safety margin for ther-
mal heat emitted from the lamp housing and provide a structure or use materials that efficiently dissi-
pate or conduct away heat. Do this, for example, by attaching a
heatsink to the anode metal base.
If the lamp holder makes poor contact with the metal base or contact resistance increases due to an oxidized contact piece, the lamp operating temperature will rise abnormally. Take sufficient precautions to avoid this.
Forced air cooling by fan is necessary for lamps of 250 W or more. The cooling fan must be designed to continue operation for 3 minutes to 5 minutes even after the lamp is turned off so that the fan will not stop during lamp operation.
COOLING FIN
COOLING FIN TLSXC0049EB E. Maintain adequate insulation to avoid trigger voltage leakage.
Use high quality insulation materials and maintain sufficient insulation gaps since an extremely high trigger voltage of 20 kV to 30 kV is applied to the lamp for start-up. (An insulation gap of 1 cm will withstand only about 10 kV, though this also depends on relative humidity. We recom-mend an insulation gap of at least 3 cm.)
Use a power supply cable capable of withstanding high voltages more than 30 kV. To avoid electrical leakage from the cable surface, do not bundle it up during wiring. The power cable layout should be as short as possible, and should not be passed through a metal opening (or should not be in contact with a metal surface) of the chassis or enclosure. If such a cable layout is not practical, use high-quality silicon insulating tube to cover the power cable, or install insulating material around the metal opening (or metal surface).
15