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Reference Manual
00809-0100-4514, Rev BA
January 2008
Rosemount 1154
www.rosemountnuclear.com
Section 3 Calibration
Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . page 3-1
Calibration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .page 3-1
Calibration Procedures . . . . . . . . . . . . . . . . . . . . . . . . . . . page 3-2
OVERVIEW Each transmitter is factory calibrated to the range specified by the customer.
This section contains the following transmitter calibration information:
• Calibration
Span Adjustment
Zero Adjustment
• Calibration Procedures
Zero and Span Adjustment
Linearity Adjustment
Damping Adjustment
Correction for High Line Pressure
CALIBRATION The Rosemount 1154DP, HP, and GP transmitters are factory calibrated to the
range shown on the nameplate. This range may be changed within the limits
of the transmitter. Zero may also be adjusted to elevate or to suppress. The
span and zero adjustments are external and located under
the nameplate.
Span Adjustment The span on any Rosemount 1154 transmitter is continuously adjustable to
allow calibration anywhere between maximum span and
1
/6 of maximum span
(
1
/4 of maximum span for Range Code 0). For example, the span on a Range
Code 4 transmitter can be continuously adjusted between 0–150 and 0–25
inH
2
O.
Zero Adjustment The zero can be adjusted for up to 500 percent of span suppression (300
percent for Range Code 0) or 600 percent of span elevation (400 percent for
Range Code 0) (see Figure 3-1 on page 3-2).
The zero may be elevated or suppressed to these extremes with the limitation
that no applied pressure within the calibrated range exceeds the full-range
pressure limit. For example, a Range Code 4 transmitter cannot be calibrated
for 150 to 200 inH
2
O (only 300 percent zero suppression) because the 200
inH
2
O exceeds the 150 inH
2
O upper range pressure limit of a Range Code 4.
The transmitter may be calibrated to cross zero, (e.g., –75 to 75 inH
2
O) but
this may result in a slight loss of linearity.