68
VEGAPULS 56K
Set-up
6.4 Adjustment with the HART
®
-
handheld
With each HART
®
-handheld it is possible to
set-up VEGAPULS 56K radar sensors like all
other sensors suitable for HART
®
-protocols. A
special DDD (Data Device Description) is not
required.
Just connect the HART
®
-handheld to the
sensor signal line after you have connected
the sensor to the power supply.
Note:
If the resistor of the power supply is less than
250␣ Ohm, a resistor must be looped into the
signal/connection line during adjustment.
The digital adjustment and communication
signals would be shortcircuited via too small
resistors of the supply current source or the
processing system, so that the sensor commu-
nication would no more be ensured.
Ri < 250
+
-
250
Ri < 250
+
-
Ri > 250
Ω
