Smart differential pressure transmitter advantages than ordinary analog transmitter1

Existing spare parts, reduce the number of

in nitrogen, ammonia synthesis tower line imported hydrogen, fluorine mixture flow measurement with large flow measurement and small flow measurement. Small flow used in synthetic tower catalytic reduction phase of the updated. When using a conventional differential pressure transducer to realize. In reduction phase, it is necessary to mount small range differential pressure transmitter ( Our factory actual differential pressure value for 16 kpa, electric furnace heating (safety parameters when the The small flow) The survey control; And need to change into a differential pressure transmitter (in a wide range The actual differential pressure value is 254 kpa) 。 Do not have such a large range. In fact to full production needs, the flow measurement is equipped with two sets of differential pressure transmitter. Using smart differential pressure transmitter range than the big. It takes only a small range by intelligent terminals in the control room differential pressure value and differential pressure in a wide range of modification, accomplish the same goal. Reduce the instrument maintenance, reduce the number of spare parts list. Like the familiar 1151 differential pressure transmitter. Span ratio of 6:1, and wisdom can transmitter range than at least can reach 30; 1. Generally can reach 50:1. If use smart transducer as a regular 4 - 20 ma output transducer of spare parts, can greatly reduce the spare instrument specifications and quantity. Intelligent transmitter is still need to improve the technical problems.

( 1) How to realize the encryption of transmitter, ensure all kinds of authority to set data.

( 2) How to reduce the transmitter to the requirement of power supply in communication. Convenient for debugging and maintenance.

( 3) In one table is multi-purpose.

( 4) On how to break through the communication protocol and fragmented situation, realize the standardization of communication, open.

3, is advantageous for the various parameters of the scene showed

instrument for simple set, can make intelligent transmitter built-in LCD module display various data. Can make the LCD display input pressure and the corresponding unit directly, the differential by sending device, can make the LCD indication unit

set of traffic engineering value, etc. In some cases can be omitted the indicating instrument, such as pressure gauge, the rotor flow meter without affecting the scene monitoring and operation. LCD display module has forced self-diagnosis function, once the measured parameter out of range or the transmitter itself fault, the LCD will display the error code to replace the original set parameters, according to timely troubleshooting. If by intelligent terminal, you can read more from a transmitter in the process of information.