Reference Manual
00809-0100-4801, Rev FA
October 2010
Rosemount 3051S Series
4-10
Recall Factory Trim—
Analog Output
The Recall Factory Trim—Analog Output command allows the restoration of
the as-shipped factory settings of the analog output trim. This command can
be useful for recovering from an inadvertent trim, incorrect Plant Standard or
faulty meter.
Field Communicator
Enter the fast key sequence “Recall Factory Trim—Analog Output.”
AMS
Right click on the device and select “Calibrate,” then “Recall Factory Trim”
from the menu
.
1. Click Next after setting the control loop to manual.
2. Select “Analog output trim” under “Trim to recall” and click Next.
3. Click Next to acknowledge restoration of trim values is complete.
4. Select Next to acknowledge the loop can be returned to automatic
control.
5. Select Finish to acknowledge the method is complete.
Line Pressure Effect
(Range 2 and Range 3)
The following specifications show the static pressure effect for the Rosemount
3051S Range 2 and Range 3 pressure transmitters used in differential
pressure applications where line pressure exceeds 2000 psi (138 bar).
Zero Effect
Example: Line pressure is 3000 psi (207 bar) for Ultra performance
transmitter. Zero effect error calculation:
± {0.05 + 0.1 x [3 kpsi - 2 kpsi]} = ± 0.15% of the upper range limit
Span Effect
Refer to “Line Pressure Effect” on page A-4.
Compensating for
Line Pressure (Range 4
and Range 5)
The Rosemount 3051S Range 4 and 5 pressure transmitters require a special
calibration procedure when used in differential pressure applications. The
purpose of this procedure is to optimize transmitter performance by reducing
the effect of static line pressure in these applications. The 3051S differential
pressure transmitters (Ranges 0, 1, 2, and 3) do not require this procedure
because optimization occurs in the sensor.
Applying high static pressure to the 3051S Range 4 and Range 5 pressure
transmitters causes a systematic shift in the output. This shift is linear with
static pressure; correct it by performing the “Sensor Trim” procedure on
page 4-6.
Fast Keys
1, 2, 3, 4, 2
Device Dashboard
Fast Keys
3, 4, 3
Ultra and Ultra for Flow: ± 0.05% of the upper range limit plus an additional
± 0.1% of upper range limit error for each 1000 psi
(69 bar) of line pressure above 2000 psi (138 bar).
Classic: ± 0.1% of the upper range limit plus an additional
± 0.1% of upper range limit error for each 1000 psi
(69 bar) of line pressure above 2000 psi (138 bar).
(182 Seiten)
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