Absolute Reflectance Attachment
17.5 Adjustment
The Reflectance Attachment has been adjusted for the use on SPECORD
®
200/205/210.
You can use it on these SPECORD
®
models without any additional adjustment.
If you want to use a reflectance attachment already available, it is advisable to check the
adjustment of this unit. For that, follow this procedure:
1. Place the reflectance attachment onto the two front carrying rails in the sample
compartment. Push it to the right-hand wall of the sample compartment as far as it
will go. Clamp it in this position by means of clamping lever (Fig. 17-1 / 8).
2. Set "V" beam configuration.
3. Adjust the zeroth order of the monochromator (→ Section Adjustment of zeroth
order, p. 8).
4. Turn stop screw (Fig. 17-1 / 6) to adjust the unit so that the beam passes through
the center of the cell receptacle for turbid samples thus being incident on the center
of the detector surface. Put a white screen, e.g. a white paper strip, in the cell
receptacle for turbid samples.
5. To adjust the unit in "W" beam configuration, put a flat mirror against the sample
locating plate (Fig. 17-1 / 2). Then, proceed as described above for the adjustment
of the "V" beam configuration. To adjust the unit, turn stop screw (Fig. 17-1 / 5).
17.6 Measurements with the Absolute Reflectance Attachment
1. Create the desired measurement parameter record in WinASPECT
®
software.
For the reflectance measurements, choose the following accessory-specific options:
Measurement
parameter
Option to be activated
Correction
Reference
Display
Reflectance
Accessory
Reflectance / fixed angle
2. Take the reference measurement. For that, set the reflectance attachment to the "V"
beam configuration shown above.
3. When the reference measurement is finished, turn the unit to set it for "W" beam
configuration.
4. Withdraw sample holder (10) from sample locating plate (2), insert the sample (1)
and let the sample holder return to the sample.
5. Take the sample measurement.
User’s Manual SPECORD 200/205/210/250 – Accessories 07/2005 117
Analytik Jena AG
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