Vintage analog voltmeter, voltmeter E381.,ussr rare 1962s

Description

Vintage analog voltmeter, voltmeter E381.,ussr rare 1962s.
Specifications
Ammeter E381, voltmeter E381, milliammeter E381
Also, this device can be called: E 381, E-381, E381, Є381, e381, e 381, e-381.
E381 ammeter, voltmeter, portable milliammeter is designed to measure current and voltage in DC and AC circuits.
Technical characteristics of E381:
Measurement limits:
- ammeter - from 1 A to 2 A;  from 2.5 A to 5 A;  from 5 A to 10 A;  from 10 A to 20 A;
- voltmeter - from 7.5 V to 15 V;  15 V to 30 V;  30 V to 75 V;  from 150 V to 300 V;  from 300 V to 600 V;
- milliammeter - from 25 mA to 50 mA;  from 50 mA to 100 mA;  from 250 mA to 500 mA.
Accuracy class - 1.
E381 frequency range:
- nominal - from 45 Hz to 60 Hz;
- extended - from 60 Hz to 200 Hz.
The total deflection current is 10 mA.
Insulation resistance E381 - 40 MOhm.
Insulation test voltage - 2 kV.
The error from temperature change by 10 ° С within the temperature range from -30 ° С to + 40 ° С is no more than 0.8%.
The error due to the tilt of the device by 10º from the horizontal position is no more than ± 1%.
The influence of external magnetic fields with a strength of 400 A / m - no more than ± 2.5%.
E381 error from frequency change within the measurement range - no more than ± 1%.
The error from the shape of the curve on alternating current - no more than ± 1%.
Calming time - no more than 3 s.
The working position is horizontal.
Overall dimensions - 131 × 166 × 74 mm.