Connector Contact Retention
Connector Contact Retention A key problem with wire harness assemblies constructed with crimp and poke style terminations is contact retention failures or terminal “push back.” Of primary concern are those…
Common Causes and Solutions of Testing Errors
Common Causes and Solutions of Testing Errors Finding the causes of errors then implementing the correct solution can be a confusing task. There are so many reasons an error can…
Temperature Coefficient of Copper
Temperature Coefficient of Resistance for Copper The Temperature Coefficient of Resistance for Copper (near room temperature) is 0.393% per degree Celsius (C) meaning that for every 1°C rise in temperature,…
Setting Practical Resistance Specs for Continuity Testing
Setting Practical Resistance Specs for Continuity Testing The IPC\WHMA-A-620 Rev A standard states ..."in the absence of agreed on test requirements between manufacturer and user the continuity spec for class 3…
Dry Circuit Testing
Dry Circuit Testing Have you ever been asked to perform a Dry Circuit Test? You might respond that dry circuit testing is not a part of the IPC/WHMA-620 test requirements.…
Can I Test For Broken Strands?
Can Standard Cirris Cable Testers Detect Broken Wire Strands? Many Cirris customers have asked if our standard cable testers can detect broken strands in their cables. If you've ever seen…
Insulation Compression Failures in Cables
Insulation Compression Failures in Cables Errors in cables can occur from the most innocent actions, even binding a group of wires too tightly. This type of error is called a…
How Much Wire is on the Spool?
How Much Wire is on the Spool? Choose one of several ways to determine the amount of wire remaining on a spool. Counting Scale: Measure a sample length of wire,…
How to Determine Creepage Distance for Connectors
How to Determine Creepage Distance for Connectors Creepage Distance/Air Gap: The Path of Least Resistance Electricity, like water, likes to travel along the path of least resistance. Looking for the…
Pullout Force per Wire Size
Pullout Force per Wire Size Below is a summary of the common minimum pull strengths per wire size. This summary is for reference only. Be sure to consult the actual…
