CS616 CAMPBELL | Alldatasheet
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5] SCIENTIFIC \\_/ WHEN MEASUREMENTS MATTER Overview The CS616 measures the volumetric water content from 0% to saturation. The probe outputs a megahertz oscillation frequency, which is scaled down and easily read by a Benefits and Features ) Compatible with most Campbell Scientific data loggers ) High accuracy and high precision ) Fast response time ) Designed for long-term unattended water content monitoring Technical Description The CS616 is comprised of two 30-cm-long stainless steel rods connected to the measurement electronics. The circuit board is encapsulated in epoxy, and a shielded four- conductor cable is connected to the circuit board to supply power, enable probe, and monitor the output. The CS616 measures the volumetric water content of porous media (such as soil) using the time-domain measurement method; a reflectometer (cable tester) such as the TDR100 is not required. This method consists of the CS616 generating an electromagnetic pulse. The elapsed travel time and pulse reflection are then measured and used to calculate soil volumetric water content. W R(REIE CS616 - — 30 cm Water Content Reflectometer High Accuracy and Precision Designed for long-term monitoring Campbell Scientific datalogger. Refer to the Compatibility section for datalogger compatibility. ) Compatible with AM16/32-series multiplexers, allowing measurement of multiple sensors ) Probe rods can be inserted from the surface or buried at any orientation to the surface. Response Characteristics The signal propagating along the parallel rods of the CS616 is attenuated by free ions in the soil solution and conductive constituents of the soil mineral fraction. In most applications, the attenuation is not enough to affect the CS616 response to changing water content, and the response is well described by the standard calibration. However, in soil with relatively high soil electrical conductivity levels, compacted soils, or soils with high clay content, the calibration should be adjusted for the specific medium. Guidance for making these adjustments is provided in the operating manual. For comprehensive details, visit: www.campbellsci.eu/cs6 16-reflectometer ‘
Probe-to-Probe Variability Precision Resolution SCIENTIFIC Volumetric water content (VWC) of porous media (such as soil) 0% to saturation +2.5% VWC (using standard calibration with bulk EC of < 0.5 dsm, bulk density of < 1.55 g cm3, and measurement range of 0% to 50% VWC) Measurement system Long rods and lower frequency are well-suited for soft soil with low electrical conductivity (< 2 dS/m). Not replaceable Not interchangeable 0°to +70°C +0.5% VWCin dry soil, £1.5% VWC in typical saturated soil Better than 0.19% VWC 0.1% VYWC Output Current Drain Power Supply Voltage Enable Voltage Electromagnetic Rod Spacing Rod Diameter Rod Length Probe Head Dimensions Cable Weight Weight +0.7 V square wave (with frequency dependent on water content) 65 mA @ 12 Vdc (when enabled) 45 pA (quiescent typical)
5 Vdc minimum; 18 Vdc
4 Vdc minimum; 18 Vdc
CE compliant (Meets EN61326 requirements for protection against electrostatic discharge) 32mm (13in) 3.2mm(0.131in) 300mm (11.8in) 85x63x18mm (3.3x25x0.7 in) 35 g perm (0.38 oz per ft) 2809 (9.9 0z) without cable For comprehensive details, visit: www.campbellsci.eu/cs6 16-reflectometer CAMPBELL 80 Hathern Road, Shepshed, LE129GX UK | +(0)1509828888 | sale@campbellsci.couk | www.campbellscieu AUSTRALIA | BRAZIL | CANADA | CHINA | COSTA RICA | FRANCE | GERMANY | INDIA | SOUTH AFRICA | SPAIN | THAILAND | UK | USA ©2020 Campbell Scientific, Ltd. | 07/28/2020