Also, this device can be called: SF-0704, SF 0704, ЄV0704, ЄV -0704, ЄV 0704, ev0704, ev-0704, ev 0704.
Voltmeter EV0704 - a device with a rectifier-coil system is designed to measure voltages are single-phase alternating current.
The device operates on the principle of rectification of the AC semiconductor diodes and the interaction between the magnetic field of a permanent magnet with rectified current, which flows through the cross bar measuring system.
In this uniform scale voltmeter and analog display system.
Dimensions - 72h72h60 mm.
Accuracy class - 1.5.
Response time less than 4 seconds.
The limits of permissible basic error appliances ± 1,5%.
In determining the reduced error normalizing value of the instrument leveled the upper limit of the measuring range.
Measurement ranges and how to integrate devices voltmeters EV0704 are given in the table below.
Changes display voltmeters EV0704 can be caused by:
- Changing the position of the instrument in any direction from the normal position by 5 ° (amount of change indication - no more than ± 0,75%);
- Frequency deviation from the normal frequency by ± 10% (change of indications - no more than ± 1,5%);
- The influence of an external uniform magnetic field, the time-varying sinusoidally with a frequency equal to the frequency of the current, voltage of 0.4 kA / m (changing testimony - ± 6%);
- Deviation of the ambient temperature from normal to 50 ° C or minus 40 ° C (the amount of change of indications - no more than ± 1,2%);
- Deviation from the normal relative humidity up to 95% at a temperature of 35 ° C (change of testimony - no more than ± 1,5%).
Operating conditions of devices EV0704
Temperature from -40 ° C to +50 ° C.
Relative humidity 95% at a temperature of +35 ° C.
Vibration resistance: acceleration of 15 m / s 2, the frequency of 30Hz.
Vibration resistance: acceleration of 5 m / s 2, the frequency of 20Hz
Shock: acceleration of 70 m / s 2, the frequency of strikes from 10 to 50 minutes.
The normal frequency and the frequency domain EV0704 - 50-1000Hz.
Weight 0.25 kg.
MTBF 50,000 hours.