Purge And Pressure Monitoring Connections; Memory (Historom); Historom/S-Dat (Sensor-Dat); Historom/T-Dat (Transmitter-Dat) - Endress+Hauser Proline Promass 84 MODBUS RS485 Operating Instructions Manual

Commissioning
#
68
6.6

Purge and pressure monitoring connections

The sensor housing protects the inner electronics and mechanics and is filled with dry nitrogen.
Beyond that, up to a specified measuring pressure it additionally serves as secondary containment.
Warning!
For a process pressure above the specified containment pressure, the housing does not serve as an
additional secondary containment. In case a danger of measuring tube failure exists due to process
characteristics, e.g. with corrosive process fluids, we recommend the use of sensors whose housing
is equipped with special pressure monitoring connections (ordering option). With the help of these
connections, fluid collected in the housing in the event of tube failure can be drained off. This
diminishes the danger of mechanical overload of the housing, which could lead to a housing failure
and accordingly is connected with an increased danger potential. These connections can also be
used for gas purging (gas detection).
The following instructions apply to handling sensors with purge or pressure monitoring connections:
• Do not open the purge connections unless the containment can be filled immediately with a dry
inert gas.
• Use only low gauge pressure to purge. Maximum pressure 5 bar (72.51 psi).
6.7

Memory (HistoROM)

At Endress+Hauser, the term HistoROM refers to various types of data storage modules on which
process and measuring device data are stored. By unplugging and plugging such modules, device
configurations can be duplicated onto other measuring devices, to cite just one example.
6.7.1

HistoROM/S-DAT (sensor-DAT)

The S-DAT is an exchangeable data memory in which all sensor-relevant parameters are stored, i.e.,
diameter, serial number, calibration factor, zero point.
6.7.2

HistoROM/T-DAT (transmitter-DAT)

The T-DAT is an exchangeable data storage device in which all transmitter parameters and settings
are stored. Storing of specific parameter settings from the EEPROM to the T-DAT and vice versa
has to be carried out by the user (= manual save function). Detailed instructions regarding the
appropriated function (T-DAT SAVE/LOAD ) → ä 63.
Proline Promass 84 MODBUS RS485
Endress+Hauser