Instruments are intended for the control of the signals of a constant, alternating voltage and alternating current. Instruments record signal and is produced the instantaneous printout of values and waveform, using the built-in printer. With the aid of the registrar it is possible to conduct monitoring voltage and current (for the control of current they are necessary current-measuring tongs). Input signal we can control, also, on [ZHK] screen. Model 8205-10: 1 channel is model 8206-10: 2 channels