C. M.I.R. unit is incorrectly aligned. Follow the manufacturer's recommended peaking procedure
to get the best results. (Scratches on M.I.R. crystals reduce throughput, replace or have
reworked if possible)
6. Extreme noise in small areas. If total absorbers are in the reference run, the computer may have
problems with divide by zero. You can make a single beam run to see if this is the problem.
7. Linear wavelength error on the chart paper. (Is normally an indexing error on the strip chart
recorder).
8. A. >20 Wavenumber linear error. The coarse index sensor is in the wrong position.
B. <20 Wavenumber linear error. Fine index sensor to wavelength drive motor sensor blade
positioning error.
C. Non-linear error larger at high wavenumbers and less are lower wavenumbers. Grating
angle adjustment: Controls the span between 2850.7 and 906.7 cm
-1
, one turn of the 2-56 screw
is @ 100 wavenumber change in span. This is not an adjustment recommended for the
customer. BUCK Scientific uses a computer to set the span to better than 2 cm
-1
with .05mm
polystyrene film and a Hg arc lamp. Make sure the M3 & M4 optics have not popped out of
position. (Kinematic mounts) This would make a huge non-linear error. The same is true for
the grating. If calibration is way off loosen the white plastic screws on each side of the grating
mount so that the grating can sit back down on its grating cradle.
9. Optics filmed/eroded and metal surfaces rusted or oxidized.
A. Freon fumes reacted with the open source to make hydrofluoric acid fumes. (Return to BUCK
for replacement and realignment).
10. No Scan Sample or Instrument Setup found under Collect and / or no Collect found. Maybe
an error in MY Instrument Installation. Use MS-DOS PROMPT (or Command Prompt in NT
systems) to go to the install directory. (Should be default C:\Program Files\Corbett Software\Buck)
In Windows 98 type C:\windows\system\regsvr32.exe -u buck500.ocx this will remove the ocx file
from the registry. Then you can delete the Corbett Software diretories and install again. (In NT
you don’t put the path in just regsvr32.exe /u buck500.ocx.) If this doesn’t work contant Buck for
forcing the install.
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