Campbell Scientific 227-L Delmhorst Cylindrical Soil Moisture Block - Manual (Page 12)

227 Delmhorst Cylindrical Soil Moisture Block
6. Specifications
Features:
• Contains blocking capacitors in its cable that minimizes galvanic
degradation and measurement errors due to ground loops
• Measures a wide range of matric potential
• Buffers salts in soil
• No maintenance required
• Compatible with most Campbell Scientific dataloggers
Compatible Dataloggers: CR800
CR850
CR1000
CR3000
CR5000
CR7
CR9000(X)
CR500
CR510
CR10(X)
21X
CR23X
Diameter: ~2.25 cm (0.88 in)
Length: ~2.86 cm (1.25 in)
Material: Gypsum
Electrode Configuration: Concentric cylinders
Center electrode: Excitation
Outer electrode: Ground
Calibration: Measurements are affected by soil salinity,
including fertilizer salts. Individual
calibrations are required for accurate
measurement of soil water potential. The soil
water potential versus resistance values in
TABLE 7-3 are “typical” values supplied by
Delmhorst Corporation. Neither Delmhorst
nor Campbell Scientific make any claim as to
the accuracy of these values. The calibration
equations in Section 7.2.3, Calculate Soil
Water Potential, were fit to the values in
TABLE 7-3 to allow output of an estimated
water potential.
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