Schambeck RI 2000, Руководство по эксплуатации

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Schambeck SFD GmbH Refractive Index Detector RI2000
SFD101.01.3x.EN / 2014-07-10 61 http://www.schambeck-sfd.com
The voltages are calculated according to the following formulas
Diff = Smpl
– Rfrn
Summ = Smpl + Rfrn

Use a multimeter to check the lamp voltage at the test point on the circuit board. For
this you need the serial number of your instrument ( see chapter 15.1 ) to locate the
test points. If you serial number is 0312xxx the points are labelled “Lampe” and
“GND”. In case of a serial number of 0401xxx the points are labelled “LampeULmp”
and “GND”. In both cases the lamp voltage should be set 3.3

0.3 V. On pages 68
and 69 you can find a schematic view of the main circuit board with the marked
positions of the test points.

If the sum voltage is only a few millivolt the light bulb does not work. Check the power
cables of the light source to make sure that they are connected properly. If needed
check the light source ( see chapter 16.4 ).

The sum voltage should be in the region of 5000

500 mV. If this is not the case
adjust the lamp voltage by turning the potentiometer R19 until the sum voltage is in
the region of 5000

500 mV.

Due to the adjustment of the light intensity it is necessary to check the lamp voltage
again. If this voltage is not in the region von 3.3

0.3 V the light source has to be re-
adjusted.

The optical system is adjusted properly if the sum voltage is 5000

500 mV and the
lamp voltage 3.3

0.3 V.