Electrical measuring instruments >> analog panel meters >> ammeters and voltmeters >> alternating current low-frequency (less 1000Hz) >> size 120x120mm
Also, this device can be called: EA-0705, EA 0705, ЄA0705, ЄA-0705, ЄA 0705, ea0705, ea-0705, ea 0705.
Milliammeter EA0705 - device-coil system for the measurement of current in electrical circuits, AC frequency from 50 Hz to 1000 Hz.
Devices operate on the principle of rectification AC semiconductor diodes and the interaction of the magnetic field of the permanent magnet with the rectified current flowing in the movable frame measuring mechanism.
The device has a non-uniform scale with an arrow the presentation of information.
Specifications milliamp and EA0705
Dimensions 120 x 120 x 50 mm.
Scale length 94 mm.
Accuracy class 1.5.
The range of measurements and how to enable EA0705 given in the table.
Limits of variation of 2.25% of the readings.
The deviation of the index from zero the scale after applying the product for 30 with the measured value corresponding to the upper limit of the measuring range - no more than 1.4 mm.
Change milliammeter EA0705 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 EA0705
Temperature from -40 ° C to +50 ° C.
Relative humidity 95% at +35 ° C.
The normal frequency and the frequency range 50-1000Hz.
Vibration resistance: acceleration of 5 m / s 2 20Hz frequency.
Vibration resistance: acceleration of 15 m / s 2, the frequency of 30Hz.
Shock: acceleration of 70 m / s 2, the frequency of 10-50 beats per minute.
Unit weight EA0705 - 0.35 kg.
Rate of mean time to failure of devices - 39,000 hours.
Average life - 12 years.