El Quimbo Hydroelectric project – Colombia
Impregilo is realising in Colombia the hydroelectric power plant of El Quimbo on Magdalena river (in Huila region), on behalf of EMGESA, that is the biggest electric company of the country. The agreement is worth about 250ml of euro. The power plant will have an installed capacity of 400MW. The project includes the building of […]
FAQ#033 – I have received the calibration Report of a piezometer. There is not the K Thermal Factor noted. In which way may I proceed?
If the value is not indicated in the Calibration Report, you should use this formula: K = -1 digit/°C For each degree of increase of temperature you should reduce 1 digit.
FAQ#019 – Which is the difference between HAE (high-air entry) and LAE (low-air entry) filters?
HAE (High air entry) filters are normally used to monitor pore pressure in the clay core dams and saturated low permeability soils. “High air entry” means high-resistance to air entry when the filter is saturated. The surface tension of the water in the very fine porus of the filter prevents entry of air. The HAE […]
FAQ#018 – What kind of overvoltage protection is built in the vibrating wire piezometers?
A plasma surge arrestor is wired in parallel with the coil (which is used to pluck the wire). The nominal impulse discharge current 8-20 microsec interval is 10 KA. Impulse spark-over voltage at 1Kv/ microsec: 700 V.
FAQ#016 – Are the vibrating wire piezometers equipped with temperature sensors, or is the temperature sensor an option?
Yes, each vibrating wire piezometer, as every Sisgeo vibrating wire instrument, is equipped with a built-in NTC thermistor YSI 44005 type (3000 Ohm at 25°C). Thermistor is not a option for vibrating wire instruments and therefore there is not additional cost for it.
Miniera di Chuquicamata
Chuquicamata è una miniera di rame a cielo aperto, in cui un minerale relativamente povero di rame è estratto in quantità enormi. Le moderne tecnologie di fusione ed estrazione mineraria permettono l’uso di tali depositi a costi molto bassi. Il minerale contiene metalli tra 1,13% e 1,18%, di cui rame in maggior quantità, ma anche […]
Piezometri a corda vibrante
Piezometri a corda vibrante Codici di riferimento: PK45S, PK45A, PK45H, PK20A, PK20S I piezometri a corda vibrante sono trasduttori di pressione assoluti progettati ed ingegnerizzati per misurare pressioni interstiziali o livelli idraulici (con compensazione atmosferica). Le applicazioni includono il controllo della permeabilità dei suoli, controllo delle pressioni idrauliche nelle dighe (corpo diga e fondazioni), verifica […]
