CS625 CAMPBELL | Alldatasheet
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5] SCIENTIFIC \\_/ WHEN MEASUREMENTS MATTER Overview The CS625 measures the volumetric water content from 0% to saturation. It is similar to our CS616 but is designed specifically for CR200(X) and CR300-series dataloggers. This Benefits and Features ) High accuracy and high precision ) Fast response time Technical Description The CS625 consists of two 30-cm-long stainless steel rods connected to a printed circuit board. 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 CS625 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 CS625 generating an electromagnetic pulse. The elapsed travel time and pulse reflection are then measured and used to calculate soil volumetric water content. Specifications Volumetric water content of porous media (such as soil) Measurements Made W R(REE CS625 Water Content Reflectometer for CR300-Series High Accuracy and Precision Designed for long-term monitoring reflectometer has a 0 to 3.3 V square wave frequency output that our CR300 and CR200(X)-series dataloggers can measure. ) Designed for long-term unattended water content monitoring ) 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 CS625 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 CS625 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. Water Content Accuracy +2.5% VWC (using standard calibration with bulk EC of < 0.5 For comprehensive details, visit: www.campbellsci.eu/cs625 ‘
Probe-to-Probe Variability Precisio Resoluti Output n on 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°t0 70°C +0.5% VWCin dry soil, £1.5% VWC in typical saturated soil 0.1% VYWC 0.1% VYWC 0to0 323V square wave (with frequency dependent on water content) Current Drain Power Supply Voltage Enable Voltage Electromagnetic Rod Spacing Rod Diameter Rod Length Probe Head Dimensions Cable Weight Weight 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/cs625 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 SCIENTIFIC ©2019 Campbell Scientific, Ltd. | 12/12/2019