Page 14 - Catalogue ANGLAIS 2016_Neat

Pore Pressure cell model EPZ

CHARACTERISTICS

Range of measurements:
0-300, 0-500, 0-1000, 0-2000,
0-3000, 0-5000 kPa

Accuracy :
-3
2 x 10 FS
Resolution :
2 x 10 FS
-4

Total length:
220 mm
Diameter:
APPLICATIONS
APPLICATIONS 28 mm
Pore pressure cell model EPZ are employed in the relative
measure of the pressure variation of the present water in Weight (Cordless) :
every type of natural or reshaped geological materials. 700 g

The EPZ is a capsule of aneroid type, what means that there is a Filter permeability :
-3
partial space curved in the tight cell. The EPZ unit is mainly used in the 10 cm/s (bronze)
-7
follow-up of the pore pressure in soil and in the hydraulic works 10 cm/s (ceramic)
(dams, dikes), grounds in which the presence of pressurized water or
water in suction has a decisive impact (landslides, alveoli of storage,
elevations), it is also used to measure the water level in piezometer
device with a diameter lower than 40 mm.
D Cable :
DESCRIPTIF ESCRIPTION
The cylindrical parts of the unit EPZ are completely manufactured in Model 2PBK
bronze. Its elastic membrane insuring the transmission of the pressure Individual shielding by pair
to the wire and strong strength. The bronze has an excellent corrosion Central Core in Kevlar
resistance and in the outside chemical attacks. (to be defined
according to prescriptions and environment of use)
Resistance of coils :
The fluid pressure applies inside the membrane which is deforms > 80 Ω
under the variations of load and suction. The wire being fixed to the
membrane, sees his tension varies proportionally to the small
distortions of the membrane, that is to say also in the change of Options :
exercised pressures. A calibration for every sensor is realized in Adaptations for specific
laboratory and allows to know and to deduct the pressure according to installation
the frequency of the measured signal.

The choice of a filter with two separate sizes of pores (permeability of Accessories:
the ceramic or the sintered bronze) allows to modify this filter to the Rotary switching box
permeability of the ground in which the unit is installed. Readout unit
The relation between the frequencies read by the piano wire of the
unit EPZ allows to obtain directly and calculate the pressure by means
of its coefficient K

By design the cell integrates a mechanical thermal compensator of the

Géo-Instrumentation - S.A.S. au capital de 37000 € - RCS Créteil B502768427 – APE : 7490B - N°TVA : FR10502768427