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Conduct Research Top

  • Understanding Insulation Resistance Testing
    A regular program of testing insulation resistance is strongly recommended to prevent electrical shocks, assure safety of personnel and to reduce or eliminate down time. It helps to detect deterioration of insulation in order to schedule repair work such as: vacuum cleaning, steam cleaning, drying
  • A Comparison of Localized Electronics Cleanliness Testing and Surface Insulation Resistance - Part 2
    This study is an investigation and comparison of the performance of no-clean liquid wave soldering fluxes using a commercially available localized extraction and cleanliness testing system and surface insulation resistance (SIR) testing.
  • The Effect of FR-4 Laminate Materials on the Surface Insulation Resistance of Wave Soldering Fluxes
    It has been observed that, since the implementation of Pb-free processing, different flux chemistries produce different surface insulation resistance (SIR) results depending on the test coupon laminate used. The most likely reason for these results are differences in the FR-4 laminate chemistry
  • Understanding Insulation Measurements on Telephone Cables
    Insulation resistance measurement is a non-destructive measurement method when carried out under normal test conditions. It is accomplished by applying a DC voltage lower than that used for a dielectric test,...[t]his resistance value expresses the quality of insulation between two conductive
  • Highly Conductive Insulation for Large, High-Speed Machines
    Silicone-impregnated fiberglass insulation has long been used as stator-coil electrical-insulation for low-voltage, direct current, traction motors. Silicone-based insulation is particularly suited for this application because its thermo-oxidative stability ensures excellent long-term resistance
  • Varistor Testing (.pdf)
    This note details the common tests of varistor parameters and describes suitable test methods using simplified test circuits. All tests are performed at 25 o C, unless otherwise specified. The test circuits and methods given herein are intended as a general guide. Since the tests frequently entail
  • Interphex Stands Test of Time (and Economy)
    is presenting its T-Tubes clean environment insulation: the only insulation in the world that is tested and approved by Factory Mutual to its Cleanroom Standards. T-Tubes are only ¼-inch thick, require no jacketing, are suitable for high- and low-temperature applications, have excellent toxicity
  • Divergence in Test Results Using IPC Standard SIR and Ionic Contamination Measurements
    Controlled humidity and temperature controlled surface insulation resistance (SIR) measurements of flux covered test vehicles, subject to a direct current (D.C.) bias voltage are recognized by a number of global standards organizations as the preferred method to determine if no clean solder paste
  • SIR and ECM Testing of Soldering Materials vs. Soldering Processes
    Manufacturers of soldering materials have been asked by electronics device manufacturers and contract electronics PWB assemblers for Surface Insulation Resistance (SIR) data of solder pastes and other soldering materials on IPCB-52 coupons. IPC-B-52 coupons were designed for evaluating
  • MIDEL 7131 Brings Wet Transformer Back to Life
    DML had a 30 year old free breathing mineral oil distribution transformer located indoors within the dockyard. It had become extremely wet, with core insulation readings by Megger test of <20MO. Oil testing showed that the transformer had very wet insulation; the mineral oil water content was 51ppm
  • Arc Tracking and Silicone Self-Fusing Tape
    Many electrical insulation applications are designed with dielectric breakdown strength (DBS), or the voltage potential required to break through an electrically insulating material, as a major factor. While this is a good test to determine how resistive a material is through its volume it does
  • Optical Transmission Properties of Adhesives
    is noteworthy for its low index of refraction and its ability to transmit light very well from 225-2500 nanometers. It is a silicone compound that combines remarkable flexibility, high temperature resistance, superb electrical insulation and outstanding optical clarity. These properties enable it to be used
  • Tin Vs. Bare
    it is much more likely the connector's connection will corrode with bare copper. Consequently, the bare copper assembly will eventually fail the contact resistance test after aging. Many people ignore this test, but it is just as much a part of the TIA and IEC standards as any of the other parameters
  • Dielectric Materials for Use in Radomes
    values (1 - 2) are often desirable for applications of materials intended for use as insulators. [3]. The standard test method for measuring the dielectric constant of polyurethane foam is ASTM D2520, which tests characteristics at microwave frequencies. It involves placing a sample of the material