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Impedance (IMP)

Task of the QC STANDARD Software and Optional Module for the R&D System

Features and Benefits

  • Optimized for quality control applications, such as end-of-line testing
  • Included in the Klippel QC Standard Software package
  • Stimulus: fast multi-tone or chirp based
  • Inductance models: Wright, Leach, LR-2
  • Electrical signal (voltage, current) analysis providing
    • T/S parameter identification according to IEC 60286
    • Vented Box Parameters (fb, Qb)
    • Impedance amplitude and phase frequency response
    • Current and voltage spectrum, noise and distortion
    • Limits and grades for all measures
    • Online yield, process control Cpk/Ppk, control rules 

The Impedance Task (IMP) identifies the lumped parameters of the equivalent circuit of the transducer, including Thiele/Small, creep and lossy inductance parameters. It complies with IEC standards 60268-5 and 60268-22. A multi-tone or chirp stimulus is used to measure the voltage and current using Klippel measurement hardware: Klippel Analyzer KA3 (QC Card or Speaker Card) or Production Analyzer. To ensure accurate measurement in the small signal domain, distortion in current and voltage are measured and checked against admissible limits.


Optional Extensions

Options operate as plug-ins and extend the functionality of this task. 

No additional test time is required, all options use or modify the excitation of this task.

Add-Ons(to purchase):

Feature Libraries(free of charge):

  • Sequence Control: skip or repeat tasks in a QC-test sequence
  • Text Logging: exporting results as plain text file (csv)


Test Hardware 

License Dongle (USB)




Related Information

Other Modules of the QC System 

Related Products


International Electrotechnical Commission
IEC 60268-5, IEC 60268-22, IEC 62459, IEC WD 63034

Audio Engineering Society
AES2, AES X241