GZCH - 2500

Audio-frequency generator GZCH-2500 is designed for locating underground communication and power cables and determining the depth of their position, as well as pinpointing the places of short circuits of the • • @ r' • lI --- ") cable cores using induction method. <•"" ,.,.,..,.,.. 'JQA\1..:. Input AC voltage 220 V, 50 Hz through the automatic circuit breaker and a thyristor is fed to the power rectifier, capacitive filter and then to a transistor inverter, the load of which is the output transformer. The generator has a audio-frequency modulation mode, protection against overcurrent, smooth and scalar adjustments of the output voltage. The generator features a special way of low-frequency modulation of the output signal. The modulation is performed by pulses of the rectangular shape with 1.5-3 Hz frequency, so that during the first half period of the modulating voltage the signal with 1024 Hz frequency is generated, while during the second half-period - one with 2048 Hz frequency. The advantage of this modulation method is that if the receiver accepts frequencies of 1024 Hz and 2048 Hz (for example,P-900), it would be possible to switch between the two on the receiver itself. In the continuous generation mode, the signal with 1024 Hz frequency is generated.