thermo spectronic Helios Gamma Benutzerhandbuch Seite 59

REMOVAL AND REPLACEMENT OF DEUTERIUM LAMP ( Gamma only )
WARNING: (1) Switch off and disconnect the spectrophotometer from
(2) UV radiation from a Deuterium lamp can be harmful to
Set the power switch to off and disconnect the spectrophotometer from the
mains supply.
Remove the back corner cover by turning the fastener one quarter turn anti-
clockwise and sliding the cover up to remove.
provided.
Re-connect the new lamp at the in-line connector.
Refit the rear cover.
Reconnect the spectrophotometer to the mains supply and switch on. Allow half
an hour for warm up time.
Lamp hours must be reset by the controlling software.
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MAINTENANCE
the mains supply and allow the lamp to cool for at least
15 minutes before proceeding.
the skin and eyes. Always view the lamp through
protective glasses that will absorb UV radiation. Avoid
looking directly at the Deuterium arc. Do not expose the
skin to direct or reflected UV radiation.
English
Make sure the lamp has cooled,
disconnect the lamp at the in-line
connector, Using the key provided
loosen the three locating screws,
rotate lamp assembly anti-
clockwise and lift lamp out.
When fitting the Deuterium lamp avoid
handling the silica envelope. Finger
marks become burnt on and cannot be
removed after the lamp is switched
on. This can affect the light output
characteristics. Handle only the base
of the lamp or the mounting plate. If
the silica envelope becomes
contaminated, clean with a powerful
degreasing solvent such as absolute
alcohol before the lamp is switched
on.
Take the new lamp, identify the
notch in the mounting plate.
Locate the lamp such that the
notch points towards the lamp
change mirror. Tighten locating
screws down with the key
GD Issue 1a (12/2000)