Vintage USSR Analog Electric Frequency counter E8004

Description

Vintage USSR Analog Electric Frequency counter E8004. Issue 1982. Unused, completely new product with original manual, warranty stamp and package (manual may be lost, package may be damaged). For a long time kept in the warehouse.
In any case learn the photos, you'll get what you see.
Frequency counter E8004 - device electromagnetic system designed to measure the frequency in AC circuits.
Accuracy class - 1.0.
Measurement range -  45Hz -55Hz,
Rated voltage - 380V.
Overall dimensions - 80 × 80 × 130 mm.
Vibration, impact resistant, splash-proof.
The main structural unit E8004 device is measuring mechanism, consisting of a mobile system, the magnetic circuit of the block.
Frequency E8004 have an outer shield to reduce the influence of external magnetic fields.
Specifications E8004
Frequency E8004 admits error in the measurements, the limit of which is at all elevations scale ± 1,0%.
Also, frequency counters E8004 influenced by various factors may allow the following error:
- If the provisions of the frequency deviation from the normal position in any direction by 45 ° - equal to the value of the maximum permissible basic error.
- Voltage deviates by ± 10% of nominal, is the value of the maximum permissible basic error;
- When the ambient temperature of (20 ± 5) ° C and any temperature within the range of from minus 50 ° C to 60 ° C at every 10 ° C change in temperature, the power of 0.5 of the maximum permissible values of the basic error.
Power consumption - less than 7 watts.
Frequency counter E8004 is designed to operate under the following conditions:
- Ambient temperature from -50 ° C to +60 ° C;
- Relative humidity: 30% - 80%.
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