Schambeck SFD GmbH
Refractive Index Detector RI2012
RI2012 V1.0 06-2013.EN / 28.10.2013
63
http://www.schambeck-sfd.com
16.7 C
HECKING AND
C
LEANING THE
F
LOW
C
ELL
In some cases it might be necessary to clean the flow cell inside the RI2012 refractive index
detector. You should try to wash away possible contaminations by purging both chambers
of the flow cell with fresh mobile phase for a longer time.
If you are not sure it the problems are caused by a contaminated flow cell or caused by
other problem contact the technical service of you local distributor or Schambeck SFD
GmbH directly.
Possible reasons to open the optical bench for checking the flow cell:
Drop of the sum voltage below 4500 mV. Make sure that your sample chambers are
washed and filled with distilled water (without bubbles) before checking the sum
voltage.
Noisy baseline (may be caused by small particles in the flow cell)
Constant drift of the baseline
To check the flow cell inside you detector follow the steps listed below:
Switch of the instrument and unplug the power cable. Open the detectors housing
after loosening the screws.
■
NOTE
When performing service work inside the instrument’s housing make sure that the power
cable is disconnected.
Open the outer housing of the optical bench after loosening the screws
Remove the heat insulation on top of the optical bench
Open the inner (black) housing after loosening the screws
Loosen the two hex-screws holding the slit aperture 2 and remove the aperture
carefully
