Universal Single Ended Amplifier
The Universal Single Ended Amplifier (USEA) provides a simple interface from low-level sensors to voltage input data loggers, chart recorders, HVAC, and control systems.
The USEA is a two stage non-inverting amplifier, voltage input to voltage output. It is optimized for amplification of low-level DC signals from transducers. The calibration for the sensor, in conjunction with the gain setting of the USEA, can be used to compute the instantaneous signal level with a high degree of accuracy. Two internal jumper blocks allow the user to select any one of ten gain settings ranging from x1 to x2250.
There are a number of fixed gain settings that are user selectable. To see which gain settings are available, please see this chart.
Other gain settings are available on special order. An internal adjustment allows calibration to intermediate settings, either at the factory or by the end user. The USEA features a CAZ (Commutating Auto Zeroing) operational amplifier to achieve input offset voltage of typically 5 microvolts, and high accuracy, for amplification of small signals. The amplifier is designed for use with thermopile light sensors, O2 sensors, or any sensor that produces a small voltage that must be amplified to a higher level for interface to a data logger or control system. An option that can be installed at the factory is provision for an offset from zero, for sensors such as Net Radiometers that produce bipolar signals.