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.
Chuquicamata Mine (Codelco), Chile
Chuquicamata is an opencast copper mine, where a relatively poor copper ore is mined in impressive huge amounts. Modern mining and smelting technology allows the usage of such depostits at unrivaled low costs. The ore contains only between 1,13% and 1,18% metals, most of it copper, but also molybdenum and selenium in a very low […]
Vibrating wire piezometers
VIBRATING WIRE PIEZOMETERS Reference products codes: PK45S, PK45A, PK45H, PK20A, PK20SVIBRATING WIRE PIEZOMETERS ARE USED TO MONITOR PORE-WATER PRESSURE IN SOILS. THEY ARE TYPICALLY SEALED IN BOREHOLES BUT CAN ALSO BE EMBEDDED IN FILLS, OR SUSPENDED IN A WELL.Typical applications include evaluating slope stability, dewatering and drainage schemes, overpressure in silt and clay soils, permeability […]