Campbell Scientific OBS-5+ Sediment Concentration Monitor and Pressure Sensor - Manual (Page 32)

OBS-5+ System
Sediment concentrations can also be calculated manually with the following
equations:
⎥
⎦
⎤
⎢
⎣
⎡
+
=
s
s
i
s
M
V
M
l / g
ρ
g/l) 103 x 2.65 (usually
density ediment S
(liters) volume nitial I V
(g) mass Sediment M
s
i
s
=
=
=
ρ
7.1.2 Equipment and Materials
• 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
7.1.3 Procedure for Sediment
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 OBS
Settings button to verify its response.
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