Universal voltmeter V7-81

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

Scope of application · operational maintenance of relay protection circuits and power circuits of electrical installations · phasing during adjustment of differential protection, connection of current and voltage transformers, electric motors · control of the correct phasing of the connection accounting circuits · removal of the volt-ampere characteristic and measurement of angles · monitoring of single- and three-phase circuits in power supply cabinets

It will help relay protection and automation services, the chief power engineer of industrial enterprises and a wide range of specialists engaged in setting up, monitoring, diagnostics and operation of electrical installations to solve the following tasks: − control phase alternation − remove the voltage characteristics − measure phase shift angles and build vector diagrams of voltage and current − control the circuits in the SHPT − check the integrity of electrical conductors − carry out operational maintenance of relay protection circuits and power circuits of electrical installations − monitor the condition and diagnose DC circuits − carry out phasing when setting up differential protection and connecting current and voltage transformers, electric motors − check the correct connection of electricity meters − determine the harmonic composition of current and voltage (up to and including the 19th harmonic)

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%

Scope of application · operational maintenance of relay protection circuits and power circuits of electrical installations · phasing during adjustment of differential protection, connection of current and voltage transformers, electric motors · control of the correct phasing of the connection accounting circuits · removal of the volt-ampere characteristic and measurement of angles · monitoring of single- and three-phase circuits in power supply cabinets · measurement of secondary (up to 10 A) and primary (up to 3000 A) currents with one device

Technical specifications: DC voltage Measuring range 2 mv-1000 V Measurement error ± (0.001 - 0.004)% AC voltage Measuring range 1 mV - 700 V Measurement error ± (0.1-8)% Frequency range 10 Hz -1 MHz

The voltmeter is capable of operating both independently and as part of automated measuring systems with RS-232 interfaces. Technical specifications Measuring ranges of electrical quantities: - constant electrical voltage from 10 MV to 1000 V - SCR of alternating electric voltage in the frequency range from 10 Hz to 10 MHz (AC) from 1 mV to 750 V - RF RF AC voltage in the frequency range from 10 kHz to 1500 MHz (RF) from 10 mV to 1000 V - DC electric current from 0.1 µA to 20 A - SCZ of alternating electric current in the frequency range from 10 Hz to 5 kHz from 10 µA to 20 A - electrical resistance from 10 mOhm to 1 GOm - frequency of the measured AC voltage from 10 Hz to 1 MHz Measurement errors of electrical quantities: - constant electrical voltage ± (0.0028 - 20)% - SCR of alternating electric voltage in the frequency range from 10 Hz to 10 MHz (AC) ± (0.09 - 15)% - RF RF AC voltage in the frequency range from 10 kHz to 1500 MHz (RF) ± (1.6 - 66)% - DC current ± (0.012 - 20)% - SCR of alternating electric current in the frequency range from 10 Hz to 5 kHz ± (0.11 - 2.35)% - electrical resistance ± (0.007 - 5.5) % - frequency of the measured alternating electric voltage ± (0.1 -10.1) % General characteristics: Operating temperature range from 5 to 40 °C AC power supply 220 V, 50 Hz Power consumption, no more than 20 VA Overall dimensions, mm 291x110x308 Weight, not more than 4.5 kg

Designed to measure electrical quantities (DC voltage and strength, AC voltage and strength, DC electrical resistance) during demonstration work in physics. The device performs the function of a demonstration multimeter. Technical specifications: Measurement of DC voltage from 0 to 100 V measurement error, not more than 1.0 % Measurement of AC voltage from 0 to 60 V measurement error, not more than 1.0% measurement of DC power from 0.01 to 200 measurement error, not more than 1.0 % Measurement of AC power from 0.01 to 200 mA measurement error, not more than 1.0 % Measurement of DC resistance from 1 ohm to 2 mOhm measurement error, no more than 1.0% power supply from the USB port of the computer power consumption, no more than 0.6 V × A weight, no more than 0.3 kg overall dimensions 172x25x77 mm

Technical specifications: DC voltage , Measuring range, 10 mv-1000V Measurement error, ± 0.01% AC voltage , Measuring range, 1 mV - 700 V Measurement error, ± 0.4% Frequency range, 20 Hz- 1 MHz Direct current , Measuring range, 0.2 µA - 10 A Measurement error, ± 0.15%

The voltmeter is capable of working both independently and as part of automated measuring systems with interfaces such as USB, RS-232, IEEE-488 (CPC). Technical specifications Measuring ranges of electrical quantities: - constant electrical voltage from 3 MV to 1000 V - SCR of alternating electric voltage in the frequency range from 10 Hz to 1 MHz (AC) from 10 MV to 1000 V - RF RF AC voltage in the frequency range from 10 Hz to 2000 MHz (RF) from 10 mV to 100 V - frequency of the measured AC voltage from 10 Hz to 1 MHz Measurement errors of electrical quantities: - constant electrical voltage ± (0.0021 - 17)% - SCR of alternating electric voltage in the frequency range from 10 Hz to 10 MHz (AC) ± (0.017 - 21)% - RF RF AC voltage in the frequency range from 10 Hz to 2000 MHz (RF) ± (0.21 - 16)% - frequency of the measured alternating electric voltage ± (0.1 -10.1)% General characteristics: Operating temperature range from 5 to 40 °C AC power supply 220 V, 50 Hz Power consumption, no more than 50 VA Overall dimensions, mm 489x91x381 Weight, not more than 8.5 kg

Technical specifications: DC voltage , Measuring range, 10 mv-1000V Measurement error, ± (0.05% +4 E.M.R.) AC voltage , Measuring range, 1 mV - 750 V Measurement error, ± (0.5% +4 E.M.R.) Frequency range, 20 Hz- 100 kHz Direct current , Measuring range, 0.1 µA - 10 A Measurement error, ± ( 0.25% +4 E.M.R.)