58
VEGASON 51K … 53K
Connection to a VEGA-signal condi-
tioning instrument
When you operate a HART
®-
capable sensor
on a VEGA-signal conditioning instrument,
you have to connect the sensor via a resistor
according to the following table during the
HART
®
-adjustment, to reach together with the
inner resistor of the instruments the value of
250 Ohm required for the HART
®
-instrument.
VEGA-signal conditioning instr.
Rx
VEGAMET 513, 514, 515, 602
50 … 100 Ohm
VEGAMET 614
no additional
VEGADIS 371
resistor
required
VEGAMET 601
200 … 250 Ohm
VEGASEL 643
150 … 200 Ohm
VEGAMET 513 S4, 514 S4
515 S4, VEGALOG EA-card
100 … 150 Ohm
Set-up
With each HART
®
-handheld you can set-up
the VEGASON series 50K ultrasonic sensors
like all other HART
®
-capable sensors. A spe-
cial DDD (Data Device Description) is not
necessary.
Just connect the HART
®
-handheld to the
signal line, after having connected the sensor
to 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 short-circuited via too small
resistors of the supply current source of the
processing system which means that the
sensor communication could not be ensured.
Ri < 250
+
-
250
Ri < 250
+
-
6.4 Adjustment with the HART
®
-handheld
Содержание VEGASON 51K
Страница 1: ...Level and Pressure Operating Instructions VEGASON 51K 53K ...
Страница 63: ...VEGASON 51K 53K 63 Notes ...