Software-configurable digital controller

The PEM-100 Controller performs many functions in the photoelastic modulator system. Its primary function is to control the peak retardation of the photoelastic modulator optical head. It does this by providing a DC voltage signal to the electronic head which determines the transducer vibration amplitude and thus the strain amplitude in the optical element. A current feedback loop from the electronic head enables the controller to maintain stable peak retardation levels. The PEM-100 Controller has many distinct advantages over its predecessor, the PEM-90 Controller: ♦ Updated user interfaces that allow for easier entry of retardation and wavelength values ♦ Storage of frequently used settings ♦ Optional Computer control via proprietary software ♦ LabView driver for integration into custom user instrument configurations Options ♦ Rack Mount, handles only (RMH) ♦ Rack Mount Extension Kit, with handles (RMO) ♦ USB Adapter (USB) ♦ RS232C to IEEE-488 Converter – National Instruments (GPIB-NI) ♦ Special Length Controller-to-Head Cable (SLCH)