User Guide

20
* 1 FTU = 1 NTU
This indicates a 10 FTU* standard calibration is
required.
This indicates the last calibration date (MM.DD).
This indicates that measurement is performed.
This indicates that batteries are weak and have
to be replaced. When this message appears,
the instrument is able to perform 50 more
measurements.
This indicates that batteries are too weak to
perform measurements. The message appears
for a few seconds, then the meter will automati-
cally switch off. At this point it is absolutely
necessary to replace the batteries.