Campbell CS650, User Manual

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CS650 and CS655 Water Content Reflectometers
8
Figure 6-1. CS650 and CS655 average current drain
Figure 6-1 shows average current drain for different measurement rates and
quantities of CS650 probes. If the time between measurements is five minutes or
longer, average current drain may be approximated at 0.15 milliamps per sensor.
6.2 Operational Specifications
Table 6-2 provides the operational specifications.
Table 6-2. Relative Dielectric Permittivity Specifications
CS650 CS655
Relative Dielectric Permittivity
Range
1 to 81
Accuracy†
1 to 40:
40 to 80:

(2% of r 0.6)
for solution EC

3 dS/m

1.4 for solution EC

3 dS/m

(3% of r 0.8)
for solution EC

8 dS/m

2 for solution EC

2.8 dS/m
Precision‡ <0.02