Martel offers a full selection of voltage and current calibrators ranging from a simple portable and very accurate voltage/current source, the IVC-222HPII to the LC-110H loop calibrator with built-in HART communication capabilities. In addition, the BETA 10 Series PSC-4010 super loop calibrator offers voltage/current simulation/measurement PLUS frequency simulation/measurement. For more demanding applications the bench top Millennium series M2000A provides ultra-accurate performance and supports IEEE and RS-232 remote control interfaces for automated test stands.