Tecfluid TH5 For DP Series User Manual

Page 6

In order to establish HART

communication, it is necessary to connect a terminal or PC

with a HART

modem, in one of the points indicated in the following figure.

ADDITIONAL FUNCTIONS WITH HART

COMMUNICATION

The TH5H and TH5TH transmitters have a MODEM for HART

communication.

By means of the implemented commands, the user can obtain the following information:



Flow rate value in real units



Totalizer value in real units (even if the equipment does not have a display).

Note:

The units of flow rate can be changed and they can be different from those of the

scale of the instrument. Also, the units of flow rate and totalized volume, can be different.



Reset or writing of a totalizer value.



Change of beginning and end of scale of the current loop (a transmitter without
HART

communication has always the beginning of scale at the zero point and

the end of scale at the maximum point of the scale plate).



Possibility of writing tags and messages into the instrument.

5 HART

COMMUNICATION CHARACTERISTICS

The detail of the characteristics with respect to the HART

communication are available

in the corresponding “Field Device Specification” document.

18 to 36 VDC

Possible points of connection of a HART

terminal or a PC with a HART

modem