F900 from ASL Inc. is designed for resistance thermometry.

F900 from ASL Inc. is an AC resistance bridge designed specifically for resistance thermometry. The device provides accuracy to less than I20 ppb (I5 KK), resolution of 0.5 ppb (0.125 KK) and achieves a specified accuracy of 20 ppb over the range of 0.2 to 390 A. Features include selectable frequency of operation, programmable excitation current, root 2 current selection and selectable source impedance.

January 2000, RS# 236