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Series 200a Fi User's Guide
22.
Be sure to wear proper protective gear such as safety goggles, safety
mask, thick long sleeves, and gloves when handling the xenon lamp.
WARNING
Lamp Installation
•
When loosening or tightening the retaining nut for the xenon lamp, be careful not to apply
excessive force to its glass bulb part. Never hold and turn the glass bulb part for
loosening/tightening.
•
Do not touch the quartz glass part of the xenon lamp with bare hands.
If the quartz glass part of the xenon lamp is contaminated with dust or fingerprints, wipe it
using a gauze sheet or absorbent cotton cloth slightly moistened with isopropyl alcohol.
If the xenon lamp is turned on with dust or fingerprints left on the surface of the quartz
glass part, it may cause contamination burn-in to decrease the mechanical strength of the
glass part, resulting in explosion of the xenon lamp. (Section 6.2)
•
Be sure to mount the xenon lamp in the specified direction. If the mounting direction
(polarity) is wrong, the cathode will be consumed significantly to which will prevent turn-on
of the lamp.
Mount the lamp so that the '+' (anode) mark on it will be positioned at the support metal of
the lamp holder. If the lamp with its cathode consumed excessively is used continuously,
pressure inside the lamp bulb may become too high, causing possible explosion. To prevent
this, replace the lamp with a new one immediately if its cathode has been consumed
substantially.
•
If the nut on the lamp base and wiring part is loose, the contact resistance between them
will increase due to poor electrical contact. This could generate a large amount of heat
which will make the lamp extremely hot, resulting in possible explosion.
To prevent this, be sure to tighten the nut securely.
Lamp Disposal
The xenon lamp is filled with high-pressure gas (approximately 1 MPa at room
temperature, approximately 4 MPa under operating condition), and this high-pressure gas
still remains in the xenon lamp after it is demounted for replacement. For disposal of the
used xenon lamp, wrap it with a thick cloth (e.g., triple-folded cotton cloth) completely and
crush its glass part with a hammer or the like. Then, discard the xenon lamp properly as a
dangerous waste item.
If the xenon lamp is discarded without being crushed, it could explode due to possible
impact at the time of disposal, scattering glass pieces which may cause personal injury.
(See Chapter 6, Maintenance)
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Troubleshooting
