Schambeck SFD GmbH
Refractive Index Detector RI2012
RI2012 V1.0 06-2013.EN / 28.10.2013
57
http://www.schambeck-sfd.com
Connect the power wires of the lamp with the screw connector on the pre-amplifier
board.
Connect the mains cable to the detector and switch on the instrument
■
NOTE
The following steps need to be performed on the running instrument. There is the danger of
electrical shock when touching electrical components.
Check Lamp Voltage. Use a voltmeter to check the lamp voltage at the test points on
the circuit board. The label of this test point points are
Lampe ULmp
and
‘GND’
.
The lamp voltage should be 3.7
0.5 V.
If needed you can adjust this voltage by turning the
potentiometer R19
at the main
circuit board.
In the following two steps the light bulb is positioned for optimal operation.
Step 1:
Place the lamp in the holder resulting in a sharp picture of the illuminated area at the slit
aperture 2. Usually the metal cover of the light bulb ends with the holder, sometimes the
metal cover stands about 1 or 2 mm out of the metal block.
Step 2:
Turn the light bulb that the picture of the filament is parallel to the slit of the second slit
aperture.
