GMA205
GROUND MICROPHONE
The GMA205 easily locates acoustic and magnetic surge waves by detecting, amplifying and conditioning the two signals present during surge generator discharges. These two signals occur very close together when the fault is approached. Two simple analogue meters are used to display the signals in a simple and effective way.
PRINCIPLES OF OPERATION
The GMA205 Seismophone was originally developed to cater for the needs of cable fault location technicians where simplicity of use and high accuracy is of utmost importance in noisy environments.
The instrument is equipped with a sharp cutoff noise cancelling filter, which greatly simplifies the acoustic pinpoint location of faults. It is also equipped with a number of other user-friendly features to simplify the procedure.
Display of information is done in analog meter fashion.
The instrument embodies the very latest Analog Electronic techniques. The acoustic amplifier employs high class analog filters to filter as much noise as possible before the signal is amplified. The magnetic amplifier is gain adjustable which allows the operator to attenuate the magnetic signal and then pinpoint exactly where the cable is.
SPECIFICATION
Dimensions
200X130X90mm
Weight
Amplifier – 800 grams
Ground Microphone – 1400 grams
Power Supply
Built-In lithium batteries
External smart charger
Filters
Acoustic Filter 150 – 700 Hz
Display
Analogue panel meters
Acoustic Amplifier
Gain: Better than 120 dB
Acoustic Indication
Low Impedance
Headphones (16 Ohms)
Battery Life
60 hrs when fully charged
ACCESSORIES
Canvas carry case
Teste leads
Headphones
Microphone carry handle
User Manual
