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Digital time relay for photo printing "Sura-2" was produced presumably since 1991.
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Manufacturer not installed.
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The "Sura-2" time relay is used for accurate and stable testing of shutter speed during photo printing, dosing of the time for switching on lighting devices and other similar purposes. It has an additional mode of operation with sound indication for shutter speed processing during darkroom processing of materials.
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The range of practiced shutter speeds is from 0.01 s to 10,000 sec.
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Exposure accuracy ± 0.1%.
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No-load power consumption 3.5 watts.
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Switched power up to 500 watts.
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