engnsa.blogg.se - Agilent 3070 Ict Manual

I CT testing does power up testing and eliminates customer debug needs to almost ZERO.

Although a costly fixture is required, ICT fixtures cover 100% testing so that all power and ground shorts are detected.

Here is why many manufacturers take ICT programming very seriously: In Circuit Test (ICT) & ICT Programming Benefits In-circuit testing and ICT programming in general are not just techniques that the manufacturers of electronic gadgets use to show how fancy they are. A test fixture provides all the necessary parameters for a test, thus satisfying whatever preconditions there may be. The setup is designed to hold the equipment under test in place and let it be tested by being subjected to controlled electronic test signals. The device that is used to perform an in-circuit test ( ICT) is referred to as a test fixture. An in-circuit test may be conducted using traditional DIY bed of nail testers or special test equipment. ICT programing is just a way of setting up a computer to perform in-circuit tests without human input. The bed of nails or in-circuit tester such as 3070 from Agilent is the most common and popular in the contract manufacturing environment.Īn ICT can be conducted either manually or automation through ICT programming. Vacuum fixtures give better signal reading versus the press-down fixtures.

An ICT fixture can either be vacuum or press-down. It takes a few weeks to create the ICT fixture and do its programming. Devices that have been tested on a bed of nails tester may show a small mark or a dimple which comes from the sharp tips of pogo pins used in the fixture. How Does In-circuit Test Work?īy pressing the DUT down against the bed of nails, a reliable contact can be made quickly with hundreds and in some cases thousands of individual test points within the DUT’s circuitry. These devices contain an array of small, spring-loaded pogo pins making contact with one node in the circuitry of the device under test (DUT). It has many pins inserted into holes, which are aligned using tooling pins to make contact with test points on a printed circuit board and are also connected to a measuring unit by wires. In-circuit test is a form of box testing where an electrical probe tests a piece of electronic equipment like a circuit board or chips, checking for resistance, opens, shorts, capacitance, and other basic quantities that will show whether the board was correctly assembled or not. A bed of nails tester is a traditional electronic test fixture. With sufficient access points, ICT can transmit test signals into and out of PCBs at high speed to apply evaluation of components and circuits. It uses a bed-of-nails test fixture to connect with multiple test points on the PCB’s bottom side.

In-circuit-testing (ICT)is usually used on mature products, especially in subcontract manufacturing.