Emerson 3051S - Manual (Page 15)

Quick Installation Guide
00825-0100-4801, Rev HA
February 2008
Rosemount 3051S
15
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 3051S Reference Manual
(document number 00809-0100-4801) to perform a rerange using the
HART Communicator.
Using the HART Communicator
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.
4801_QIG_RevHA.fm Page 15 Tuesday, February 26, 2008 12:17 PM