Piezoelectric signal conditioner
3-channels, RS-232, 12 VDC | Model 133 Meggitt Sensing Systems - Measurement Group

Endevco® model 133 is a 3-channel, Piezoelectric and Isotron signal conditioner that is manually or computer programmable. Manual control is accomplished via front panel "Select Channel" push-button, three (3) "Channel LEDs", one "Select Function" push-button, seven "Function LEDs", a four character LED display, showing the state of each function/channel, and four "Edit" push-buttons to change entries in the LED display. There are three LEDs used as fault status indicators for open/short at the ISOTRON inputs. Computer control can occur via the standard RS-232 port and optional Application Software.

Two modes of operation, Normal and Programming/Setup, utilize the front panel LED Display. In Normal Mode, there are Monitoring and Non-Monitoring states. In the Monitoring state, the LED display indicates RMS valve (±10%) of the signal present at the output of selected channel. The Non-Monitoring State turns off the LED display for low noise applications and to minimize power consumption. In Programming Mode, the unit is ready for manual programming of existing channel setups. The unit will automatically return to Normal Mode after 20 seconds of front panel inactivity or after pressing the "Select Function" pushbutton while the "Monitoring State" function LED is flashing.

The rear panel contains an RJ-11 connector for the RS-232 serial communications port, an input power connector, and on a per-channel basis, a BNC output connector, a 10-32 connector for the PE input, and a BNC connector for Isotron input. Three Model 133 units may be installed in a 19-inch rack mount adapter. The standard unit is powered by 90-264 VAC, 50/60 Hz. The -1 option is powered by 9-18 VDC.