VEGA VEGAMET 625 - Manual (Page 17)

17
6 Setup with the integrated display and adjustment unit
VEGAMET 625 • Double channel HART
28970-EN-130701
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Note:
Approx. 10 minutes after the last pressing of a key, an automatic reset
to measured value indication is triggered. Any values not confirmed
with [OK] will not be saved.
6.2 Setup steps
Through parameter adjustment, the instrument is adapted to the indi-
vidual application conditions. A measurement loop calibration is the
most important step and should always be carried out. A scaling of
the measured value to the desired physical variable and unit, possibly
including a linearization curve, is often useful. The adaptation of the
relay switching points or the setting of an integration time to smooth
the measured value are further standard adjustment options.
Instruments with Ethernet interface can be provided with a Host name
suitable for the measurement loop. As an alternative to the addressing
via DHCP, it is also possible to adjust an IP address and subnet mask
suitable for your network. If necessary, the e-mail/Web server can be
also configured with PACTware.
Information:
When using PACTware and the corresponding VEGA DTM, additional
settings can be carried out which are not possible or only partly pos-
sible with the integrated display and adjustment unit. When using an
adjustment software, you either need one of the integrated interfaces
(RS232/Ethernet) or the interface converter VEGACONNECT.
Further instructions for setting up the web server and e-mail functions
are stated in the online help of PACTware or the VEGAMET 625 DTMs
as well as the supplementary instructions manual "RS232/Ethernet
connection".
VEGAMET 625 can process measured values of more than one
HART sensor. The measured values are transmitted as digital HART
signals to the same cable (bus). An analogue 4 … 20 mA transmis-
sion is not possible, the current is limited to 4 mA. An own, unam-
biguous address (address range 1-15) must be assigned to each
connected sensor. This mode is also called HART multidrop mode.
Address 0 (mode 4 … 20 mA) must not be used.
Note:
When addresses are being assigned, only one sensor must be con-
nected on the bus. If this is not the case, no sensor can be accessed
and it is not possible to assign an address.
The addressing can be carried out directly on each HART sensor via
the respective adjustment unit or adjustment software. As an alterna-
tive, the setting of the sensor address can be also carried out via the
VEGAMET menu under "Service - Sensor address" (see chapter
"Setup procedure" under "Service - Change sensor address").
Parameter adjustment
Set HART address