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Technical specifications: Frequency range, from 0.1 Hz to 1 Frequency range, from 0.1 Hz to 1 MHz Frequency setting error, ± 1 % Signal amplitude: - at a load of 600 ohms - without load, not less than 5 V (10 V span) not less than 10 V (20 V span)Smooth signal attenuation, at least 20 dB Frequency stability in 15 minutes, no more than 0.5% Hz Frequency setting error, ± 1 % Signal amplitude: - at a load of 600 ohms - without load, not less than 5 V (10 V span) not less than 10 V (20 V span) Smooth signal attenuation, at least 20 dB Frequency instability in 15 minutes, no more than 0.5 %

Technical specifications: Measuring range 20 mv-1000 V Measurement error ± (0.03% +5 E.M.R.) AC voltage Measuring range 1 mV - 700 V Measurement error ± (0.3% +200 E.M.R. - 4% +800 E.M.R.) Frequency range 20 Hz-100 kHz Direct current Measuring range 1 mA - 2 A Measurement error ± (0.12% +10 E.M.R.) Alternating current Measuring range 10 mA - 2 A Measurement error ± (0.6% +300 E.M.R.) Frequency range 20 Hz - 5 kHz

Technical specifications: reproduction of DC voltage from 50 mv to 1000 V - ranges of 200 mV; 2; 20; 200; 1000 V - error 0.01 – 0.023 % reproduction of the sinusoidal AC voltage from 0.3 mV to 750 V - ranges of 200 mV; 2; 20; 200; 750 V - error 0.15 – 0.225 % - frequency range 20 Hz - 100 kHz (20 Hz - 5 kHz on the range. 200 V; 20 Hz - 2.5 kHz on the range. 750 V) reproduction of DC power from 0.03 µA to 50 A - ranges of 200 Ma; 2; 20; 200 mA; 2; 50 A - error 0.012 – 0.022 % reproduction of AC power of sinusoidal shape from 3 µA to 50 A - ranges of 200 Ma; 2; 20; 200 mA; 2; 50 A - error 0.062 – 0.23 % - frequency range 20 - 5000 Hz (45 - 1000 Hz on the range. 50 A) RS-232C interfaces; USB operating temperature range from + 5 to +40oC dimensions 184.5x465x540.5 mm weight 20 kg power supply ~ 230 V

Technical specifications: The waveform is sinusoidal, rectangular (TTL) Frequency range from 0.1 Hz to 10 MHz Frequency setting error ±0.02% Frequency instability ±0.01% in 15 min Signal amplitude ± 2.5 V at 50 ohm load ±5 V without load Limits of adjustment of the output signal level from 2 mV to 1.85 V (skz) at a load of 50 ohms from 4 mV to 3.75 V (scz) without load Signal level unevenness ± 5% at frequencies from 0.1 to 10 Hz relative to 1 kHz ± 2% at frequencies from 10 Hz to 1 MHz ±10% at frequencies from 1 to 10 MHz Harmonic coefficient ± 0.2% at frequencies from 10 to 100 Hz ±0.07% at frequencies from 100 Hz to 20 kHz ± 0.2% at frequencies from 20 to 120 kHz ±1% at frequencies from 120 kHz to 1 MHz ±4% at frequencies from 1 to 10 MHz Parameters of the rectangular (TTL) signal form log. "1" 3 2.4 V; log. "0" ≤ 0.4 V In the frequency range from 0.1 Hz to 2 MHz, the duration of the front, the cutoff is not more than 100 ns Operating temperature range from minus 10 °C to + 40 °C Power supply ~230 V, 50 Hz; 10 V×A Dimensions; weight 210×71×255 mm; 2 kg

Main Features: Output voltage indication error, ± 0.3 V Output current indication error, ±0.06 A Instability of the output voltage due to changes in the supply voltage, 0.05% Instability of the output current from a change in the supply voltage, 0.2% Instability of the output voltage when the load current changes, 0.1 % Instability of the output current when the load voltage changes, 5.0 % Output voltage ripple, mV 1.0

Technical specifications: Frequency range of sinusoidal waveforms, 0.1 Hz - 17 MHz Frequency range of rectangular-shaped signals, 0.1 Hz - 1 MHz Frequency setting discreteness, ±(0.012 + 0.0001 f), f in Hz Frequency instability in 15 minutes, no more than ± 1•10-5 Smooth signal attenuation, 40 dB Stepwise signal attenuation, 20, 40, 60 dB

Technical specifications: DC voltage , Measuring range, 10 MV - 1000 V Measurement error, ± 0.03% AC voltage , Measuring range, 1 mV - 750 V Measurement error, ± 0.4% Frequency range, 20 Hz- 100 kHz Direct current , Measuring range, 1 mkA - 2 A (B7-91/1) Measuring range, 1 mkA - 20 A (B7-91) Measurement error, ± 0.03%

Technical specifications: Capacitance (10-13-0.02) F, inductance (10-8–16x103) Gn Resistance (10-3–2x107) ohms Conductivity (10-9-10) Cm Q factor, loss factor 10-3-103 The error is ±0.15% Offset voltage 2±0.2 V Measuring signal levels (0.1±0.02) V and (1±0.2) V Range selection: automatic, manual RS-232C interface Dimensions, weight: 90x265x317 mm, 2 kg Power supply: ~220V, 10 VA

The devices are designed for: measurements and registration of the main indicators of the quality of electrical energy established by GOST 32144-2013 (GOST R 54149-2010) with registration of protocols according to GOST 33073-2014; measurements and registration of the main parameters of electrical energy in single-phase and three-phase electrical networks (including the effective values of voltages and currents with sinusoidal and distorted curves; active, reactive and full electrical power); measurements of parameters of secondary circuits (load capacity of measuring transformers and voltage drop) in electric energy metering systems and electric energy losses in power supply lines. functional test and verification of connection of meters of active and reactive power and energy, energy measuring converters of voltage, current at the places of their operation; functional test and verification of the connection of single-phase and three-phase electric energy meters without breaking current circuits to detect theft of electricity; measurements of electricity losses in the power supply line. The PKE-A energy tester provides registration with subsequent transfer to a personal computer (PC) of statistical data on the PKE: Values of the PCE according to GOST 30804.4.30 (GOST P 51317.4.30) and GOST 30804.4.7 (GOST P 51317.4.7) with a registration depth of 512 days; Values and durations of voltage dips and overvoltages; Values of the short-term dose of flicker; Parameters of the electrical network and vector diagrams with the depth of registration: - 24 hours for averaging time of 3 s, - 200 days for averaging time of 10 min. The program "Energy Monitoring ES" provides the formation of quality control protocols in the form of GOST 33073-2014.

Technical specifications: Output constant voltage, 0 - 3 kV; 0 - 10 kV Output AC voltage, 0 - 3 kV; 0 - 10 kV Measurement of leakage current, from 0 to 100 Ma The amplitude value of the output voltage ripples relative to the set voltage at a load current of 1 mA, ≤ 5% The error of setting the output voltage, ≤ 4% Protection tripping current, up to 50 mA Output power, 500W Overall dimensions (HxWxD), 280x480x475 mm Weight, 36 kg Operating conditions , Operating temperature, from +5 to + 40 °C Humidity, 80% at 25 °C

Technical specifications: B5-78 (15 V, 3 A); B5-78/1 (30 V, 2 A); B5-78/2 (50 V, 1 A); B5-78/4 (20 V, 1.5 A); B5-78/6 (30 V, 4 A); B5-78/7 (50 B, 2.5 A) Voltage measurement error: ±0.3 V Current measurement error: ±(0.04–0.06) A Voltage instability when the load current changes 0.03% Instability of the current when the voltage changes at a load of 0.2% Voltage ripple 0.5–1 mV Current ripple 0.1% Power consumption 90 - 320 VA Two 3-digit indicators (voltage, current) Adjustments are rough, smooth Dimensions 115x185x360 mm Weight: 3.7 kg (B5-78, B5-78/1, B5-78/2) 3 kg (B5-78/4) 5.5 kg (B5-78/6, B5-78/7) Power supply ~220 V A