GVd, GVu, GHa Geophones

Description

Intrinsically safe geophone sensors GVx and GHx of the ARAMIS M/E system designed for measuring the velocity of ground vibrations.

Operating position and mounting type:

GVu – vertical operation, mounted on the roof,
GVd – vertical operation, mounted on the floor,
GHa – horizontal operation.

The PPV version (sensors GVu-P, GVd-P and GHa-P) includes sensitivity limitation of the probe, preventing output signal saturation at ground movement velocities of 1 m/s.

The sensors are intrinsically safe devices of Group I, Category M1.

Specification

Electrical Parameters
Maximum output voltage		Uo = 8 V
Maximum output current		Io = 21 mA
Maximum output power		Po = 0.17 W
Maximum external inductance		Lo = 500 mH
Maximum external capacitance		Co = 1000 μF
Maximum input voltage		Ui = 20 V
Maximum input current		Ii = 80 mA
Maximum input power		Pi = 0.3 W
Maximum internal inductance		Li = 600 mH
Maximum internal capacitance		Ci – negligible
Transmission type		DTSS – pulse digital transmission via power-supply telecom line
Metrological Parameters
Frequency range
- sensor GVx, GVx-P		4.5 Hz - 1500 Hz
- sensor GHa, GHa-P		4.5 Hz - 1500 Hz
Permissible positioning deviation
- sensor GVx, GVx-P		± 7°
- sensor GHa, GHa-P		± 1°
Mechanical Parameters
Protection rating		IP54
Weight		0.7 kg
Dimensions		135 mm x Φ50 mm
Additional Functions
- Sensor sensitivity memory
- Brass mounting thread

Gallery

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