M
AVTMTTR25 Rev C April 2008
36
Measuring Ranges
Turn ratio: 0.8:1 to 20,000:1, 5 digit resolution
Current: 0 to 100 mA, 4 digit resolution
Transformer Polarity: NORMAL (in phase) or REVERSE (out of phase)
Accuracy
Turn ratio: ±0.1% (0.8 to 2000)
±0.15% (2001 to 4000)
±0.25% (4001 to 10,000)
±0.50% (10,001 to 20,000)
Current (rms): ±(2% of reading + 1 digit)
Measurement Method
In accordance with ANSI/IEEE C57.12.90
Transformer Winding Phase Relationship
ANSI C57.12.70-1978
CEI/IEC 76-1:1993 and Publication 616:1978
AS-2374, Part 4-1982 (Australian Standard)
Measuring Time
4 sec for turns ratio, excitation current, and phase displacement (polarity) testing.
Display
Wide temperature range LCD module, 128 x 64 dots, 21 characters by 8 lines.
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