Campbell CS650, Инструкция по эксплуатации

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CS650 and CS655 Water Content Reflectometers
7
FIGURE 6-1. CS650 and CS655 average current drain
FIGURE 6-1 shows average current drain for different measurement rates and
quantities of CS650 sensors. If the time between measurements is five minutes
or longer, average current drain is approximately 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 electrical
conductivity (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
Volumetric Water Content
Range 0% to 100%
Accuracy† ±1% (with soil specific
calibration), ±3%
(typical with factory
VWC model) where
solution EC < 3 dS/m
±1% (with soil specific
calibration), ±3%
(typical with factory
VWC model) where
solution EC < 10 dS/m
Precision‡ <0.05%