28454A Quad Conditioner with Balanced Current Excitation

Dynamic Strain Conditioner

28454A Quad Conditioner with Balanced Current Excitation accommodates single arm static or dynamic strain gages, RTDs or other resistive transducers that require constant current to excite them. A unique balanced excitation circuit delivers accurate current yet has excellent immunity to noise pickup. Dynamic strain measurements may be made using only a 2-wire interface to the transducer. Gain is programmable to x8192.

The 28454A is equipped with Precision Filters' proprietary balanced differential constant current excitation. This topology is especially useful for reducing pickup from interfering sources as compared with traditional unbalanced current sources. The gage health monitor circuits indicate open or shorted gages and the input overload detector reports overloads by out-of-band signals which could cause in-band distortion.