Bio-Rad Model 680 Microplate Reader Accessories - Manual (Page 48)

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7. LCD displays “Filter not installed”. Enter the Edit Menu by pressing Edit key,
and set up the filters.
8. Wells have color, but absorbance values seem
low.
a. Incorrect filter used for measurement and
/or reference wavelength. Check wavelength used in analysis. Read
plate in single wavelength mode at all
wavelength to verify that the proper filter was
used. The measurement wavelength should
produce the highest absorbance.
b. The best measurement wavelength filter for
the substrate in use has not been installed
in the filter wheel. Check references for the substrate you are
using, or determine the best measurement
wavelength by analyzing the substrate
product on a scanning spectrophotometer.
Custom filters are available from 400 to 750
nm.
c. The filters have been switched in the
wheel. Check that the filters are installed in the
correct position.
9. “Printer error” displayed. Check for paper jam. Install the printer paper
correctly.
10. “Battery error” displayed. The internal battery is almost dead. Contact
your local Bio-Rad service center or local
representative.
11. “memory error” ,
“calendar error” ,
“LCD hardware error” ,
“Incubator error” ,
“Light level error between cannel” ,
“D/A conversion error” ,
“A/D conversion error”
is displayed.
Contact your local Bio-Rad service center or
local representative if these problems
persist.