Pressure transmitter microprocessor has 16 bytes of program RAM, and there are three 16-bit counter, one of which performs A / D conversion.
D/A converter to the microprocessor and calibrated digital signal fine-tuning data, these data can be modified by the transmitter software. The data is stored in EEPROM and remains intact even after a power failure.
The digital communication line provides an interface between the transmitter and an external device such as a Model 205 Smart Communicator or a control system using the HART protocol. This line detects the digital signal superimposed on the 4-20mA signal and transmits the required information through the loop. The type of communication is frequency-shifted keyed FSK technology and is based on the BeII202 standard.