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Turns Ratio Calibration Standard
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Turns Ratio Tester Calibration Device
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The Vanguard Turns Ratio Calibration Standard is designed to calibrate all Vanguard Turns Ratio Testers. It offers selectable turns ratios from 0.8 to 33,000 to 1 with accuracy of ±0.05% of the set value guaranteed for turns ratios from 0.8 to 5,000.
The Vanguard Turns Ratio Calibration Standard features three decade rotary switches (unit, 10th, and 100th) for selecting the turns ratio. A multiplier switch provides 1, 10, 100, 200, 1000, and 3000 multiplier values.
The unit uses a nickel-iron supper-alloy core toroidal transformer to ensure a very low excitation in order to achieve high turns ratio accuracy. Up to 250Vac test voltage can be used with the Vanguard Turns Ratio Calibration Standard. The high excitation test voltage allows the unit to be used with virtually all turns ratio testers on the market.
A turns ratio calibration certificate is provided with each Turns Ratio Calibration Standard.
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Turns Ratio Calibration Standard
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Technical Specifications
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PHYSICAL SPECIFICATIONS
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Dimensions: 16” x 7” x 13.5” (40.6 cm x 17.8 cm x 34.3 cm)
Weight: 22 lbs. (9.98 Kg)
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MAX EXCITATION VOLTAGE
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250 Vac, 50/60 Hz
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TURNS RATIO RANGE
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0.8 to 33,000
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TURNS RATIO RESOLUTION
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0.01 step for turns ratios from 0.8 to 11
0.1 step for turns ratios from 11 to 111
1.0 for turns ratios from 111 to 1110
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TURNS RATIO ACCURACY
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0.8 to 5,000: ±0.05% of setting
5,001 to 10,000: ±0.1% of setting
10,001 to 20,000: ±0.20% of setting
20,001 to 33,000: ±0.35% of setting
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ENVIRONMENT
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Operating: -10oC to 50oC (15oF to +122oF)
Storage: (-30oC to 70oC (-22oF to +158oF)
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HUMIDITY (MAX)
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90% RH @ 40? C (104? F) non-condensing
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ALTITUDE (MAX)
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2000m (6562 ft) to full safety specifications
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WARRANTY
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One year on parts and labor
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Specifications are valid at nominal voltage and ambient temperature of +25?C (+77?F).
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