Campbell CS650 Manuál s instrukcemi stáhnout pdf (Strana 18)

CS650 and CS655 Water Content Reflectometers

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 reading + 0.6)

for solution EC

≤3 dS/m

±1.4 for solution EC

≤3 dS/m

±(3% of reading + 0.8)

for solution EC

≤8 dS/m

±2 for solution EC

≤2.8 dS/m

Precision‡

<0.02

1 2 ... 13 14 15 16 17 18 19 20 21 22 23 ... 57 58

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Campbell CS650 Manuál s instrukcemi Strana 18