3250 / 3252 / 3302 Transformer Test System

3250 / 3252 / 3302 Transformer Test System

The Chroma 3250 / 3252 / 3302 Transformer Test System is designed for transformer production lines or incoming/ outgoing inspection in quality control processes, with high stability and high reliability.

The 3250 / 3252 provides 20Hz-200kHz test frequencies, and the 3302 provides 20Hz-1MHz test frequencies. In addition to transformer scanning test functions, the 3252 / 3302 has LCR Meter functions.

The 3250 / 3252 / 3302 cover most of transformer’s low-voltage test parameters which include primary test parameters such as Inductance, Leakage Inductance, Turns-Ratio, DC resistance, Impedance, and Capacitance (between windings) etc.; secondary test parameters such as Quality Factor and ESR etc.; and pin-short test function. High-speed digital sampling measurement technology combined with a scanning test fixture (A132501) enables low-efficiency transformer inspection to be more accurate and faster.

The 3250 / 3252 / 3302 provides several output impedance selections to solve inductance measurement error. An equivalent turns-ratio calculated from measured inductance of windings is also provided to improve turns ratio measurement error problems caused by large magnetic flux leakage in transformer with low permeability magnetic cores.

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Key Features

  • Test frequency: 20Hz-200kHz/1MHz, 0.02% accuracy
  • Basic accuracy: 0.1%
  • Different output impedance modes, measurement results are compatible with other well-known LCR meters
  • Enhanced Turn Ratio measurement accuracy for low permeability core
  • Fast Inductance/ Turn Ratio measurement speed up to 80 meas./sec
  • Fast DCR measurement speed up to 50 meas./sec
  • Graphical and tabular display of swept frequency, voltage current and bias current measurements (3252/3302)
  • Build-in 8mA bias for RJ45 transmission transformer saturation condition (option)
  • Leakage inductance 100 bin sorting and balance of leakage inductance for TV inverter transformer
  • ALC (Auto Level Compensation) function for MLCC measurement (3252/3302)
  • Test fixture residual capacitance compensation for transformer inductance measurement

Application Notes

Manufacturer

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