% engine=luatex
\mainlanguage[sv]
\setupinteraction[state=start]
\setupcolors[state=start]
% \environments
\usemodule[database]
\unprotect
\startsetups TSV:unix
 \catcode \#=\@@comment
\stopsetups
\protect
\defineseparatedlist[TSV][separator=tab,before=,after=,first=\bTR,last=\eTR,left=\bTD,right=\eTD]
\setupTABLE[r][1][style=bold,background=color,backgroundcolor=gray]
\starttext
\placetable[here][tab:test]{caption}
{\bgroup
\bTABLE
\startTSV 
time $ T $(s)	Decay  $ \frac{d\nu}{dt} $ 	error $ \delta \nu'=\sqrt{\nu} $
\stopTSV
\processseparatedfile[TSV][sndfall.dat] 
\eTABLE \egroup}

As you can see in table(\ref[t][tab:test]) it works out well in this experiment.
\stoptext