5 setup with hart® handheld, 5 setup with hart, Handheld – VEGA VEGABAR 41 HART User Manual
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VEGABAR 41 (HART
®
)
Setup
4.5 Setup with HART
®
handheld
With any HART
®
handheld you can set up
VEGABAR 41 like all other HART
®
compatible
sensors. A special DD (Device Description)
is not necessary. Just connect the HART
®
handheld to the sensor signal cable after you
have connected the sensor to supply volt-
age.
Note:
If the resistance of the signal circuit is less
than 200
Ω
, a resistor of 250 … 350
Ω
must
be looped into the signal/connection line
during adjustment. The digital adjustment
and communication signals would otherwise
be short-circuited through insufficient resist-
ance of e.g. the supply voltage source or the
processing system. In such case, communi-
cation with the sensor would not be assured.
Simply connect the adjustment resistor in
parallel to the connection socket of the HART
®
handheld (see figure).
250
Ω
Ri < 200
Ω
+
–