Type of apparatus: automated tension minidisk infitrometer for measuring unsaturated hydraulic conductivity of soils
Outside dimensions complete MultiDisk (w x l x h):................................................. 66 x 46 x 35 cm Outside dimensions of free Infitlration modules held in a T frame (w x l x h): ............................................................................................................................. 43 x 40 x 33 (41(1)) cm Weight (without water):.........................................................................................13.5 kg Weight (including water):........................................................................................15 kg Data logger:............................................................................................................CR1000 (Campbell Scientific, Inc.) Battery:.................................................................................................................. NiMH 12 V 1500 mAh Charger:................................................................................................................. Ni-MH specific wall charger Typical maximum time of operation per charge:...................................................... 36 hours(2) Control:.................................................................................................................. a) via CR1000KD keyboard (Campbell Scientific, Inc.) .............................................................................................................................. b) via laptop PC No.of aluminum T-shaped frames: .......................................................................... 2 No. of infiltration modules:...................................................................................... 3 per frame (6 in total) Number of Mariotte’s bottles:................................................................................. 1 per frame (2 in total) Range of pressure heads (h0):............................................................................... 0.5 to 60 mm tension head Infiltration module specifications Height:.................................................................................................................. 33.0 cm Height usable for water storage:............................................................................ 16.0 cm Reservoir diameter:............................................................................................... 5.0 cm Vertical bar measuring buoyancy force:................................................................. 2.5 cm dia., 22.5 cm length Sintered stainless steel disk:................................................................................... 4.45 cm dia., 0.3 cm thickness Usable reservoir volume:...................................................................................... 148 ml Total max. volume of water in reservoir:............................................................... 190 ml Sensor type:......................................................................................................... console load cell with bridge sensor Maximum sensor load:.......................................................................................... 300 g Load sensor properties: - nonlinearity, hysteresis :.......................................................................................± 0.184 mm (zw) or ± 0.162 ml (Vw) - temperature effect.................................................................................a) +20 to +40°C = ± 0.107 mm / 10 K (zw) = ± 0.095 ml / 10 K (Vw) b) -10 to +20°C = ± 0.072 mm / 10 K (zw) = ± 0.063 mm / 10 K (Vw) Mariotte’s bottle Total height:.............................................................................................................. 19.5 cm Diameter:.................................................................................................................. 5.0 cm Length of suction adjustment tube:.......................................................................... 15.0 cm Volume of water:....................................................................................................... 160 ml (1) vheight at maximum extension of infitlration modules and adjusting legs (2) depending upon measuring regime zw – actual water level height in the resevoir of the infiltration module Vw – actual water volume in the reservoir of infiltration module |
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