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The ATRT-01 S3 is Vanguard’s fourth generation, micro-processor based, single phase, automatic transformer turns-ratio tester. The ATRT-01 S3 uses the IEEE C57.12.90 measuring method to determine the transformer turns-ratio. The transformer turns-ratio is determined by precisely measuring the voltages across the unloaded transformer windings. The ATRT-01 S3’s measuring circuitry self adjusts before each measurement to ensure turns-ratio accuracy. Two selectable test voltages, 4Vac and 40Vac, offer flexibility in testing different types of transformers.

• Standalone or computer-controlled
• Inexpensive
• Displays turns-ratio from 0.8-15,000
• Calculates turns-ratio percentage error
• Displays winding polarity and phase angle
• Displays excitation current

ATRT-01 S3	Cables
Cable Part Number [8000-0006] RS-232C Cable [ 6' (1.83m) ] 8000-0006 [8000-0093] H and X Cable Set [ 15' (4.57m) ] 8000-0093 [8000-0112] Power Cable 8000-0112

ATRT-01 S3	Technical Specifications
TYPE Transformer Turns Ratio Tester PHYSICAL SPECIFICATIONS Dimensions: 12” x 10” x 8” (30.4 cm x 25.4 cm x 20.3 cm) Weight: 8 lbs. (3.6 Kg) INPUT POWER 120 or 240 Vac (Selectable), 50/60 Hz MEASURING METHOD ANSI/IEEE C57.12.90 RATIO MEASURING RANGE 0.8 - 15,000 (5 digit resolution) TURNS-RATIO ACCURACY 40 Vac: 0.8-1,999 (0.1%), 2,000-3,999 (0.25%), 4,000-15,000 (1%) 4 Vac: 0.8-1,999 (0.1%), 2,000-3,999 (0.25%), 4,000-15,000 (2%) TEST VOLTAGE 4 Vac @ 1.0A, 40 Vac @ 0.6A PHASE ANGLE MEASUREMENT 0 - 360 degrees, Accuracy ±0.2 degree (±1 digit) POLARITY READING In-Phase or Out-of-Phase indication EXCITATION CURRENT READING RANGE 0-2 Amperes, Accuracy: 2% of reading (±1 mA) DISPLAY Back-lit LCD (128 x 64 pixels), viewable in direct sunlight and low light levels COMPUTER INTERFACE RS-232C PC SOFTWARE  Windows XP/Vista/7 Transformer Analysis Software (included with purchase) INTERNAL TEST RECORD STORAGE 128 records of 33 readings EXTERNAL TEST RECORD STORAGE Up to 999 test records on external USB Flash drive. SAFETY Designed to meet IEC 61010 (1995), UL 61010A-1, and CSA-C22.2 standards ENVIRONMENT Operating: -10?C to 50?C (15?F to +122?F) Storage: (-30?C to 70?C (-22?F to +158?F) HUMIDITY (MAX) 90% RH @ 40? C (104? F) non-condensing ALTITUDE (MAX) 2000m (6562 ft) to full safety specifications CABLES One 15 ft. (4.6m) Single phase cable, one power cord, one cable bag OPTIONS Transportation Case (Can hold unit and cables) WARRANTY One year on parts and labor Specifications are valid at nominal voltage and ambient temperature of +25?C (+77?F).