Decagon Devices 10HS, Руководство пользователя

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2 ABOUT THE 10HS 10HS
2.2 Specifications
Range:
Apparent Dielectric Permittivity ( ε
a
) : 1 (air) to 50
Soil Volumetric Water Content ( V W C ) : 0 to 0 . 57 m
3
/ m
3
(0 to 57%VWC)
Accuracy:
ε
a
:
±
0.5 from ε
a
of 10 to 50 (VWC)
VWC : With standard calibration equation,
±
0 . 03 m
3
/m
3
(
±
3% VWC) typical in mineral soils that have solution electrical
conductivity
< 10 dS/m
Note: With soil specific calibration,
±
0.02 m
3
/m
3
(
±
2%
VWC) is typical in any soil.
Resolution:
ε
a
: 0.1 from ε
a
of 1 to 30, 0.2 from ε
a
of 30 to 50
VWC : 0.0008 m
3
/m
3
0.08% VWC) in mineral soils from 0 to
0.50 m
3
/m
3
(0 to 50% VWC)
Measurement Time: 10 ms (milliseconds)
Power Requirements: 3 VDC @ 12 mA to 15 VDC @ 15 mA
Output: 300 to 1,250 mV, independent of excitation voltage
Operating Temperature: 0 to 50
◦
C
Survival Temperature: -40 to 50
◦
C
Connector types: 3.5 mm stereo plug or stripped and tinned leads.
Cable length: 5 m standard; custom cable lengths up to 40 m avail-
able upon request
Data Logger Compatibility (non-exclusive):
•
Decagon: Em50, Em50R, Em5b, ProCheck handheld reader.
•
Campbell Scientific: CR10X, 21X, 23X, CR850, 1000,
3000, etc
•
Other: Data acquisition systems capable of switched 3 to
15 V excitation and single ended voltage measurement at
≥
12 bit resolution
4