PerkinElmer 200A Series, User Manual

Page: 149 / 172

Maintenance . 149
i. As shown in Fig. 6-18, put the anode terminal (marked “+”) of the lamp into the
metal fixture on the ceramic plate. Then, using the anode nut, mount the lamp so
that the protrusion on the bulb is positioned as shown in Fig. 6-19. Refer to Fig. 6-
13 for a view of the lamp when assembled.
NOTE:
Mount the xenon lamp so that the protrusion on the bulb faces the instrument front panel (Fig. 6-
16). A mistake in the orientation may cause an increased light loss and preclude obtaining the
desired performance from the instrument.
j. After mounting the Xe lamp in the lamp house, assemble it into the main body (Fig.
6-14). Raise the lamp house and insert it into the main body, then lower it and
press it downward into place. The lamp house will not move if installed correctly.
Finally, secure the lamp house with retaining screws and connect its connector with
the main body.
k. When installation of the lamp house is finished, close the light source cover and
turn ON the power (check that the lamp comes on).
Now proceed to positional adjustment of the Xe lamp.
3. Positional Adjustment of Xe Lamp
WARNING
Direct Gazing at Illuminating Xenon Lamp Could Cause
Eye Damage
The xenon lamp radiates intense ultraviolet light when it is on.
If you look at the illuminating xenon lamp during coarse adjustment of its
position, your eyes could be damaged.
Do not look at the xenon lamp directly when it is lit. Be sure to wear tinted
safety glasses to prevent possible eye damage.
The position of the beam slightly differs from one lamp to another, so it is necessary to adjust the
lamp position before the detector is first used or when the lamp is replaced. Use the three adjusting
screws on the right side of the instrument for the adjustment.
HORIZONTAL: For adjusting horizontal position
FOCUS: For adjusting the focal point of light source
VERTICAL: For adjusting vertical position
Lamp adjustment involves coarse adjustment, in which the image of the light beam is monitored
and fine adjustment, in which detailed adjustment is made while observing the data. Coarse
adjustment is required at first.