ZCON 100 is a hand held tool intended for use with the multi-range series of pressure transmitters. Communicating directly with the transmitter’s ASIC, it allows the user to select up to 3 predefined pressure ranges, as well as to adjust zero point. “Range” LEDs on the front panel indicate the active range number and “Link” and “Error” LEDs provide status information. ZCON 100’s built in 4 mA reference used for zero trim operation can be periodically verified/calibrated with the help of commercially available loop calibrators.