2012 is an input card for measuring mA or V signal or a potentiometer. The card can be plugged into the 2000 panel meter series, 2800 field meter series, 910E/920E large panel meter series, or 575F/1000F/1100F/ 1800F large field display series. The reading is displayed with six digits, if desired. Fixed trailing zeros are available. The card features a freely adjustable lowpass filter, hold function, and tare function. An external switch or relay contact can be used to trigger the hold and tare functions. 2012 supports several 2000 series auxiliary cards: an analog output card, a serial communications card, and two- or three- relay alarm cards. If the same device is equipped with two 2012 input cards, the combination is called 2212. It is possible to calculate a simple mathematical operation among the channels.