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4. Click the Goto button to open the 'Goto wavelength' dialog box. Enter '801' in

the wavelength field and click OK. The instrument will then drive to 801 nm.

Note

Note the SBW reading in the Status Display dialog box.

5. The SBW reading needs to be at approximately 18. This can be adjusted by

changing the NIR Energy level in the Setup page, under the Independent tab. If

the reading is greater than 18, raise the value of the Energy level field. If the

SBW is under 18, lower the energy level. Once the Energy level has been

adjusted, you will need to click OK in order to note the change to the SBW

reading. Then click the Goto button and again drive the instrument to 801 nm

by entering '801' in the wavelength field and pressing OK. This procedure may

need to be repeated in order to reach the required setting. Please note that each

time you adjust the Energy level reading, you must also drive the instrument to

801 nm.

6. Click the Baseline button in the Scan dialog box. Follow the on-screen

prompts to perform a 100%T baseline scan and a 0%T baseline scan.

Hot Tip

When collecting the 0%T baseline scan do not block the beam, instead remove

the PTFE reference disk from the reflectance port and allow the light to be

trapped by the Extended sample compartment.

7. Once the baseline correction is complete, the Ordinate status display in the top

left corner of the dialog box will show 'Zero baseline' in red text.

8. Clamp the sample over the reflectance port. The sample should be

homogeneous, substantially flat, and large enough to completely cover the

image.

9. Click the Start button. The Save As dialog box will appear, allowing the

method to be saved as either a data file or a batch file. If the file is saved as a

batch file, all of the method parameters will be stored with the scan.

Specular-only reflectance measurements

Note

Parameters activated by a radio button that are not specifically mentioned in the

following procedure should be set to 'Off' (e.g., the Signal-to-noise mode radio

button). These parameters will not affect the procedure.

Follow steps 1 to 6

of the transmission measurements procedure then:

1. From the Setup menu, set the following parameters:

Cary tab

X mode: Mode

anometers

X mode: Start 800

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Mantis 5000 Specifiche Pagina 37