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OBS-5+ System
7.1.2 Equipment and Materials
7.1.3 Procedure for Sediment
24
Sediment concentrations can also be calculated manually with the following
equations:
M
=
s
g
l /
⎡
⎤
M
+
V
s
⎢
⎥
ρ
i
⎣
⎦
s
•
Dry, completely disaggregated bottom sediment or suspended matter from
the monitoring site
•
Large black, neoprene or polyethylene tub
•
1-gallon (4 l) brown Nalgene polypropylene bottle with top cut off
•
1-liter volumetric flask
•
Hand-drill motor (manual suspender)
•
Mixing propeller (manual suspender)
•
Scale with 10 mg accuracy
•
Automatic suspender (optional)
•
Tea cup with round bottom and teaspoon
1) Put batteries in the OBS-5+ and connect it to a PC with test cable using the
RS-232 plug (FIGURE 6-1).
2) Start OBS-5+ Utility program; wake the OBS-5+; and click the
Settings button to verify its response.
=
M
Sediment
mass
(g)
s
=
V
I
nitial
volume
(liters)
i
ρ
=
S
ediment
density
s
(usually
2.65
x
103
g/l)
OBS
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