Campbell CS616 Instruction Manual download pdf (Page 9)

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 µA

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 Œ compliant 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.

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Campbell CS616 Instruction Manual Page 9

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