M94011A
Oriel
®
LCS-100
TM
Small Area Sol1A
- 25 -
6.5 IRRADIANCE ADJUSTMENT
There is one method of adjusting the irradiance. The lamp should be warmed up at least 10 minutes
to be stable, and a detector such as the 91150V should be placed in the intended working plane to
monitor the output adjustment.
Working Distance
Working Distance (W.D.) is defined as the distance from the output port bottom surface to the target
plane. Since the output beam is slightly divergent, adjusting the W.D. has an inverse effect on the
Irradiance. The LCS-100
TM
has been factory adjusted for best uniformity at the specified W.D. found
in section 8, where it is certified. However, the uniformity is generally within Class B for W.D. within
the range of 6 to 10 inches.
As the lamp ages, the W.D. will need to be reduced to maintain 1 SUN output. This is accomplished
by means of the mounting rod or target device height adjustment. The mounting rod is adjusted by
the following means:
1. Grasp both of the mounting rod knobs, one in each hand.
2. Rotate the locking knob counterclockwise. This is the knob with the Model number 370-RC
engraved, generally on the right as shown in the photos.
3. To raise the LCS-100
TM
, place that hand under the angle bracket mounted to the integral
baseplate, and exert upward force while rotating the other knob counterclockwise. This knob has
a gear that engages with the rack on the rod to move it up.
4. To lower the LCS-100
TM
, slowly rotate the other knob clockwise. This knob has a gear that
engages with the rack on the rod to move it down.
5. Rotate the locking knob clockwise to secure the clamp around the rod.
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