12
Information Messages
Lumiso will display these messages as M numbers, if it
detects unexpected readings when making its optical
measurements
A common cause that can trigger any of these messages to be
displayed is contamination of the optical windows or stained
glassware. See sections Keeping the Optics Clean and How to
Get Accurate Results. If messages continue to be displayed,
please contact your local Palintest branch or distributor.
Message
Number
Likely Cause
Suggested Action
M1 and M2
Blank is too dark
Check and clean all
glass tubes used.
Repeat blanking
process
Contamination
obscuring optics
See “Keeping the
Optics Clean”
M3 and M4
Blank, sample tube,
or NDF standard
moved or removed
too early
Carefully repeat
blanking and reading
procedure
M5
Light cap not fitted
correctly
Check or change light
cap on tube
External light entering
the optical cell
Move instrument away
from external light