CS616 and CS625 Water Content Reflectometers
CS625 Compatibility
Dataloggers:
CR200X series
CR200
series
Probe-to-Probe Variability:
±0.5% VWC in dry soil, ±1.5% VWC in
typical saturated soil
Resolution:
better than 0.1% volumetric water content
Water Content Accuracy:
±
2.5% VWC using standard calibration with
bulk electrical conductivity
≤
0.5 deciSiemen
meter
-1
(dS m
-1
) and bulk density
≤
1.55 g cm
-3
in measurement range 0% VWC to 50% VWC
Precision
:
better than 0.1% volumetric water content
5.1 Dimensions
Rods:
300 mm (11.8 in) long, 3.2 mm (0.13 in)
diameter, 32 mm (1.3 in) spacing
Probe Head:
85 x 63 x 18 mm (3.3 x 2.5 x 0.7 in)
5.2 Weight
Probe (without cable):
280 g (9.9 oz)
Cable:
35 g m
-1
(0.38 oz per ft)
5.3 Electrical Specifications
Output
CS616:
±
0.7 volt square wave with frequency
dependent on water content
CS625:
0 to 3.3 volt square wave with frequency
dependent on water content
Power:
65 mA @ 12 Vdc when enabled, 45
μ
A
quiescent
Power Supply Requirements:
5 Vdc minimum, 18 Vdc maximum
Enable Voltage:
4 Vdc minimum, 18 Vdc maximum
Maximum Cable Length:
305 m (1000 ft)
Electromagnetic
Compatibility:
The CS616/CS625 is Πcompliant with
performance criteria available upon request.
RF emissions are below EN55022 limits if the
CS616/CS625 is enabled less than 0.6 ms and
measurements are made at a 1 Hz (1 per
second) or slower frequency. The
CS616/CS625 meets EN61326 requirements
for protection against electrostatic discharge
and surge.
3
Summary of Contents for CS616
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Page 50: ...CS616 and CS625 Water Content Reflectometers 42 ...
Page 52: ...Appendix A Discussion of Soil Water Content A 2 ...
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