Peak Test Services is launching a PS 21/G Series contact probe built-in position sensor that is designed to provide a measurement of the distance travelled by the probe in contacting the test item. Suitable for measuring parameters such as pin lengths, component heights or the depth of drill holes in wire harnesses and connectors, the new PS 21/G Series test probes incorporate a small integral potentiometer that is screwed together with the contact probe and the receptacle.
When a voltage is applied, a three-wire circuit acting as a potential divider provides either a voltage or a resistance that is linearly proportional to the travel of the probe and can therefore be used by the test system to provide a distance measurement.
To take into account electrical and mechanical tolerances, the system needs to be calibrated to provide the exact plunger position. This can be achieved either by calculating the difference between two measurement values in relation to a reference position, or by using a special 'golden device' as a reference.
Depending on the hardware and software of the test system, the measurement signal can be zeroed at user-defined positions. This method enables positive or negative deviations to be determined without the need to calculate the differences.
The sensor system has a measuring range from 0 to 5.2mm, an accuracy of +/-2 per cent and a reproducibility of +/-0.05mm. The new test and measurement probes are available in the UK and Ireland from Peak Test Services and via a range of appointed distributors worldwide.
Follow the link for more information about the PS 21/G Series contact probe with integral position sensing.