Portable data collectors

A simple DAS is a chart recorder that can track important variables like screw speed, diehead pressure, melt temperature, motor amperage, etc. More useful is a computer-based DAS these come in two forms portable data collectors/machine analyzers and fixed-station data acquisition system. 

Portable data collectors, PDCs, are similar to check sheets in that they can be easily moved around. In injection molding, these devices are often referred to as portable machine analyzers, PMAs. They have some important advantages ... 

Most portable vibration data collectors use a coiled cable to connect to the transducer (see Figure 43.24). The cable, much like a telephone cord, provides a relatively compact length when relaxed, but will extend to reach distant... 

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