Hach-Lange EVITA OXY User Manual - Manual (Page 54)

52
HART ®
The OXY 4100/4150/3150 offers additional
features which can be accessed through the
USC 5000/6000/7000 signal converter or HART
®
communication. To use HART ® communication it
is necessary to use a PC or PLC with a HART ®
modem and associated software.
All Universal Commands are fully implemented, as
are the necessary Common Practice Commands,
but to ensure complete utilisation of the transmitter,
special Device Specifi c Commands are used.
HART ® communication makes it possible to read off:
· oxygen concentration
· temperature
· remaining lifetime of the OXY 1100 sensor
· alarms
· indication of completed calibration
When calibrating/replacing an OXY 1100 sensor
the following can be performed with HART
®
communication:
- initiation of calibration
- keying in of values for relative humidity, air
pressure and salinity for compensation purposes
- zero setting of life counter
The following programming is possible with HART ®
communication:
– setting of measuring range
– deactivation of tilt-switch for initiating an
automatic calibration
– setting of current output signal during calibration
for 4 mA, 20 mA or last measuring value
– deactivation of alarms on current output
– measurement start after completed calibration
– change OXY 1100 sensor type
The USC 5000/6000/7000 can act as either a primary
master or a secondary master. This can be set as
shown in fi g. 51.
Fig. 51
USC
HART Settings
USC
Change HART
Trm. Mode
USC
USC
USC
USC
081R9403.02.0
2
Scan HART bus
USC
Scan HART bus
Are you sure ?
USC
Set mode to
Secondary master
Curr. Trm. mode
Primary master
Curr. Trm. mode
Secondary Master
Set mode to
Primary Master
Scan HART bus
busy
USC
Trm. address 0
changed to 05
USC
USC is Primary Master
USC is Secondary Master
USC restarts
USC restarts