Model 133 is a three-channel, Piezoelectric and Isotron signal conditioner that is manually or computer
programmable. Manual control is accomplished at the front panel by means of a “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 the entries in the LED
display. There are three LEDs used as fault status indicators for open/short at the Isotron inputs.
There are two modes of operation, Normal and Programming/Setup. Both modes of operation utilize the front
panel LED display. In the Normal Mode, there are two states, Monitoring and Non-Monitoring. In the Monitoring
state the LED display indicates the RMS valve (±10%) of the signal present at the output of the selected channel.
The Non-Monitoring state turns off the LED display for lower noise applications and to minimize power
consumption. In the Programming Mode, the unit is ready for manual programming of existing channel setups.
The unit will automatically return to the Normal Mode of operation after 20 seconds of inactivity of the front panel
or after pressing the “Select Function” pushbutton while the “Monitoring State” function LED is flashing.
The rear panel contains an RJ-11 connector (RS-232 serial communication is no longer supported), an input
power connector, and on a per-channel basis, a BNC output connector, a 10-32 input connector for the PE input,
and a BNC connector for the Isotron input. Three model 133 units may be installed in a 19-inch rack mount
adapter.

Parameter Name	Parameter Value
Applications	for piezoelectric transducers