Emerson Rosemount 3051G Quick Start Manual page 17

July 2023
For instructions using AMS Device Manager, see the Rosemount 3051
HART 7
Note
When performing a zero trim, ensure that the equalization valve is
open and all wet legs are filled to the correct level.
Procedure
Choose your trim procedure.
a) Analog Zero Trim – Sets the analog output to 4 mA.
•
•
b) Digital Zero Trim – Recalibrates the sensor zero.
•
•
Example
URV = 250 inH
inH O (compared to factory settings) values outside this range will be
2
rejected by the transmitter.
2.6.1 Trimming with a Field Communicator
Procedure
1. Connect the Field Communicator (see
power up
2. Follow the HART menu to perform the desired zero trim.
Table 2-3: Zero Trim Fast Keys
Fast Key sequence
Quick Start Guide
Reference Manual.
Also referred to as a "rerange," it sets the Lower Range
Value (LRV) equal to the measured pressure.
The display and digital HART output remains unchanged.
The LRV is unaffected. The pressure value will be zero (on
display and HART output). 4 mA point may not be at zero.
This requires that the factory calibrated zero pressure is
within a range of 3% of the URL [0 + 3% x URL].
O Applied Zero Pressure = + 0.03*250 inH
2
for instructions).
Analog zero (Set 4 mA)
3, 4, 2
Quick Start Guide
O = + 7.5
2
Connect the wiring and
Digital zero
3, 4, 1, 3
17