Keysight-Technologies-U1401B-Process-Calibrator-Keysight-Technologies-U1401B-OPT-ABD-902-The-U1401B-Process-Calibrator-from-Keysight-Technologies-effectively-gives-you-two-tools-in-one-as-it-allows-you-to-calibrate-&-measure-at-the-same-time-Supplied-in-a-robust-carrying-case-the-U1401B-functions-as-both-a-calibrator-for-process-signals-&-a-true-RMS-multimeter-It-is-ideal-for-the-verification-of-control-circuits-in-heating-&-cooling-systems-&-for-obtaining-a-reliable-circuit-BR-