Emerson Rosemount 1153 Series B, Справочное руководство

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Reference Manual
00809-0100-4302, Rev BA
January 2008
Rosemount 1153 Series B
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 1153DB, HB, GB, and AB 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 (for all models
except 1153AB) or to suppress (for all models). The span and zero
adjustments are external and located under the nameplate.
Span Adjustment
The span on any Rosemount 1153 Series B transmitter is continuously
adjustable to allow calibration anywhere between maximum span and
1 /
6
of
maximum span. 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 or 600
percent of span elevation (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.