Parker’s compact PHD 28 interactive display provides flexible readout of operating parameters, which can include machine status and load weight in any of several units.
The PHD28 has a dynamic screen that changes based on the weight and system condition, as well as including an operator interface. In addition, it has built in processing power to perform the basic calculations to measure the weight, check the pressure sensor inputs for faults, rescale values in metric or imperial, or even change the font size and icons on the screen. System productivity can be improved since the screen can change dynamically, based on weight, system faults, or user errors to highlight conditions that could slow down or stop the weighing process. With its compact, 2.8-in. size, it suits many consoles and dashboards without compromising valuable space.
How It Works
In this example, two pressure sensors read the pressure on both the rod and piston side of a hydraulic cylinder while checking the inputs values and scaling the readings. The PHD28 has the processing power to calculate the corresponding force of the cylinder based on the cylinder dimensions while the weight of the container can be calculated as well. In addition, it can be used as the operator interface to perform the tare calculations, store the value and then compute the weight of the payload. The PHD28 offers the functionality of the weight display, operator input device, and system information center in one unit to help reduce costs and save dashboard real estate.
This material was contributed by John P. Thomas, regional application engineer at Parker Hannifin’s Electronic Controls Div., Elk Grove Village, Ill. For more information, call (800) 221-9257.