Mantis 5000 Spécifications télécharger pdf (Page 20)

will induce optical scattering and may reduce reflectance or transmission of these

components at certain wavelengths.

1. Turn off the spectrophotometer and remove any cell holders or other accessories

from the sample compartment (the PC can be left on).

2. Turn the power to the spectrophotometer on and allow time for the instrument to

warm up (about two hours).

3. Fully open the sample compartment lid and remove the front panel.

4. Make sure mirror M3 is set to the position in the DRA required for the intended

application. The reflectance position "R" is the one closest to the front of the accessory;

the transmission position "T" is the position furthest back. To move the mirror, loosen its

mounting screw, lift the mirror off the base plate and move it to the position required. Set

the mirror alignment pins into the correct locator holes and secure the mount with the

mounting screw. See figure

19.

Figure 19: The Varian 900, 1800, 2500 Diffuse Reflectance accessory with the optics

cover removed. The large reference plate is clamped over the sample port at the centre of

the sphere cap.

5. If not installed already fit the centre mount port plug into the top of the sphere.

6. If not installed already install the specular port plug.

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Mantis 5000 Spécifications Page 20