7 switch on phase – VEGA VEGADIF 55 4 … 20 mA_HART User 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
31731
-EN
-081119