Rosemount TankRadar Rex
Chapter 1 Checks and Adjustments
1-6
Commissioning Manual
308011En, Ed.2/Rev.B
June 2008
1.8
RTG 3900 - General information
1.8.1
Tank Information
•
Tank name
•
Product in tank
•
Note the Unit ID, see Figure 1-4 It can also be found on the Signal
Processing Card (after C on the label). See
TankRadar Rex Instal-
lation Manual Ed. 3 rev.B, chapter 3.1.1
for information on the
Transmitter Head Electronics Card.
Figure 1-4
Label with Unit ID.
1.8.2
Electrical check
•
RTG Power Supply
: The 3900 Rex transmitter accepts 100-240
VAC, 50-60 Hz and max. 80 W. The built-in Transformer Rectifier
Card (TRC) automatically adapts to the connected supply voltage.
Optional: low voltage AC/DC versions (34-70 VAC/48-99 VDC).
•
Grounding
: Certain national regulations requires protective
grounding of enclosure, see
Special Safety Instruction
for further
information. Special Safety Instruction is delivered together with
each Rex transmitter. Check with Emerson Process Management/
Rosemount Tank Gauging and/or local authorities if necessary.
•
Field bus continuity
: Measure the resistance between leads 3
and 4. Resistance values between 1 and 20
Ω
indicate that the
field bus cable is undamaged and correctly connected.
•
Field bus shield grounding
: Check that the field bus shield is
connected to ground at the FCU only, and not at the RTG.
