Schambeck SFD GmbH
Refractive Index Detector RI2000
SFD101.01.3x.EN / 2014-07-10
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 depends on the version of this board.
If the serial number of you instrument is 0312xxx the points are labelled ‘
Lampe’
and
‘
GND’
, if the serial number of your instrument is 0401xxx the points are labelled
Lampe ULmp
and
‘GND’
.
To find your serial number see
chapter 15.1
The lamp voltage should be 3.3
0.3 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.
