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Alignment check

This procedure can be used to check the optical alignment of the accessory without

disturbing any mirror adjustments. A one inch square of translucent paper (e.g., tissue) is

required.

1. Open the Align (if it is not already running) by clicking the Windows Start button,

then Programs, then Cary WinUV, and then Align.

2. Darken the room and set the instrument for white light operation as follows:

Cary tab

Beam Mode Double

Y Mode %R

Ave Time 0.1

SBW 2

Slit Height Full

Select the Zero Order checkbox and click Apply.

2. Remove the cover to the accessory and remove the centre mount plug.

3. Slide the piece of translucent paper (e.g., tissue) into the reflectance port just behind

the port opening. Looking through the centre mount port, examine the location of the

sample beam relative to the port. Check that the beam is centred, and falls completely

within the port surface area. The beam should not overfill the port.

Figure 26. Checking the beam at the reflectance port.

4. Repeat the previous step for the reference beam at the reference port.

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