VEGA VEGADIF 55 4 … 20 mA_HART - Manual (Page 31)

l I s the instrument connected according to chapter "Connecting to
power supply"?
l D id you tighten all screws?
l D id you screw up the housing covers?
T he green LED on the electronics module lights for a few seconds or
the connected local indication lights if the voltage is switched on on the
instrument.
5 .7 Switch on phase
A fter VEGADIF 55 is connected to voltage supply or after voltage
recurrence, the instrument carries out a self-check. The following
steps are carried out:
l I nternal check of the electronics
l F or approx. 3 seconds, the output signal takes on the value 12 mA
T hen the actual measured value is displayed and the corresponding
current is transmitted to the cable. 1)
1) T he values correspond to the actual measured value as well as to the
settings already carried out, e.g. default setting.
Switch on phase
VEGADIF 55 • 4 … 20 mA/HART 31
5 C onnecting to power supply
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