Table T2. Summary of procedures and settings for using the Spectrex laser particle counter with fine-grained sediment.

Table T2. Summary of procedures and settings for using the Spectrex laser particle counter with fine-grained sediment.


Procedure	Setting or technique
Threshold	<0.5 µm (setting 7)
Background	<20 counts/cm³
Agitation	Invert bottle every 2 s for 30 s, taking care to avoid introducing air bubbles. Rest 15 s before beginning scan.
Scan time	30 s
Scan type	Normal
Filter	<1 µm to >16 µm
Concentration	700-800 counts/cm³