Rosemount 3051, Quick Installation Manual

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Quick Installation Guide
00825-0100-4051, Rev BA
June 2009
Rosemount 3051
12
S
TEP
6: T
RIM THE
T
RANSMITTER
Transmitters are shipped fully calibrated per request or by the factory default of full scale
(lower range value = zero, upper range value = upper range limit).
Zero Trim
A zero trim is a single-point adjustment used for compensating mounting position and line
pressure effects. When performing a zero trim, ensure that the equalizing valve is open and
all wet legs are filled to the correct level.
If zero offset is less than 3% of true zero, follow the “Using the HART Communicator”
instructions below to perform a zero trim. If zero offset is greater than 3% of true zero,
follow the “Using the Transmitter Zero Adjustment Button” instructions below to rerange. If
hardware adjustments are not available, see the 3051 Reference Manual (document
number 00809-0100-4051) to perform a rerange using the HART Communicator.
Using the HART Communicator
Using the Transmitter Zero Adjustment Button
Push and hold the zero adjustment button for at least two seconds but no longer than ten
seconds.
HART Fast Keys Steps
1, 2, 3, 3, 1 1. Equalize or vent the transmitter and connect HART
communicator.
2. At the menu, input the HART Fast Key sequence.
3. Follow the commands to perform a zero trim.
Without LCD Display With LCD Display
Span
Zero
Span
Zero
4051 RevBA.fm Page 12 Monday, June 22, 2009 3:15 PM