FISCHER FISCHERSCOPE X-RAY XDLM 231, Operator'S Manual

Page: 159 / 236

FISCHERSCOPE ® X-RAY 157
Solution Analysis
19.3 Positioning the Measuring Cell
Before you start
Before you position the measuring cell you need to fill it, see Chap. 19.2 on Page 156.
Procedure
1. Place the measuring cell into the measuring chamber. Depending on the instrument type, the
cup opening must face upwards or downwards:
•
Instrument with measuring direction from top to bottom: Cup opening must face upwards.
•
Instrument with measuring direction from bottom to top: Cup opening must face down-
wards.
To make the focusing easier, position the measuring cell such that the measurement beam does
not point to the center, but to the edge curvature of the measuring cell, see the following figure:
2. Adjust the focus of the instrument.
3. Shift the measuring cell carefully such that the measurement beam points to the center of the
measuring cell. Do not readjust the focus. The video image shows the metal reference plate out
of focus. This is correct. To measure correctly, the focus must always be set to the surface of
the foil.
What you can do next
You can now perform measurements.
5. Place the clamping ring over the foil-covered
measuring cell and press it down carefully
until the foil is taught. Avoid:
•
Tearing the foil
•
Air bubbles
Overflowing liquid is caught in the drip
groove.