TAM / PSM 5 Panels

GENERAL PRACTICES

Use the Sherwin Incorporated PSM-5^TM Panel (“G” or “P” models) at the beginning of each work shift to monitor a penetrant system for any sudden changes in materials or hardware performance. Conduct the “system test” prior to accepting production parts and record the processing variables in a log book- e.g., dwell time, pre-wash time, emulsifier immersion and drain times, oven temperature and exposure time, wash water temperature and pressure and developing time.

Processing times for the PSM-5^TM Panel should be that least conductive to high sensitivity performance within allowable time envelopes. For example, if the allowable penetrant dwell time is 10 to 30 minutes and the wash time is 1 to 3 minutes, the PSM-5^TM Panel should be processed with he shortest penetrant dwell time (10 minutes) and the longest wash time (3 minutes).

PSM-5^TM Panels are normally used in pairs. Although no two PSM-5^TM Panels have exactly the same crack patterns, there is a very close similarity in patterns. Upon receipt, since there is a difference in crack patterns, the panels should be processed to establish a baseline in order to record crack characteristics for reference purposes.

Designate one panel in a pair as the “working panel” and the other as the “control”, or “master panel”. Use the working panel to conduct routine system tests. Periodically use the control panel to validate the working panel, or to verify system anomalies revealed by the working panel. Additionally, both panels should be validated periodically against each other in a laboratory using new materials. It is also beneficial to compare periodically the working panel processed with material from the production line against the control panel processed with new materials from the laboratory. Production technicians should observe these tests.

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TAM / PSM-5 Panels

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