| Number of measuring and current electrodes connected to the multi-core cable |
48, the multi-core cable consist of two sections, 24 electrodes each, the unit is located in the center |
| Number of channels for simultaneous measuring operation |
1 to 10. A pair of receiving electrodes for each channel is selected according to protocol |
| Number of current lines in simultaneous operation |
1. Transmitting electrodes pair is selected according to protocol |
| Electrode spacing |
1 to 10 m |
| Multi-core cable lenght |
50 to 500 m (two sections with length from 25 to 250 m) |
| Signal form |
direct current bipolar impulses of regulated duration with pauses |
| Power supply |
24 V, external |
| Operating temperature |
-20 to +50°C (option down to -40°C) |
Transmitter
|
|
| Number of input channels |
1 (or 2 lines) (commutation multi-core cable is possible) |
| Direct current bipolar impulses of regulated duration with pauses |
|
| Impulses duration |
0.2048, 0.4096, 0.8192, 1.6384, 3.2768, 6.5536, 13.1072, 26.2144, 52.4288 seconds |
| Duty ratio |
0.2 .. 0.5 |
| Output voltage |
30, 100, 300, 500 V |
| Instability of output voltage under variation of load resistance |
1% at most |
| Output current |
10 mA to 5A |
| Maximum output capacity |
0.5 kW (500 V - 1 A, 100 V - 2 A, 30 V - 5 A) |
| Time for complete current cut-off on active load |
10 μs at most |
| Protection from short circuits on the output |
|
Receiver
|
|
| Number of input channels |
1 to 10 pairs of dipoles |
| Input resistance of each channel |
at least 20 MOhm |
| Range of measured signals |
10 μV to 12 V |
| Amplitude response of each channel |
at least 2 to 3 μV |
| Instant dynamic range |
at least 90 dB |
| Voltage of in phase signal on the input |
12.5 V at most |
| Amplification rate of the prime amplifier |
1, 10, 100, 1000 |
| Bit length of Sigma-delta analog-digital converter (ADC) |
24 |
| Level of in phase interference suppression |
at least 80 dB |
| level of industrial interference suppression with frequencies 45 to 55 and 55 to 65 Hz |
at least 80 db |
| Operating temperature |
from -20 to +50°C (option down to -40°C) |