Span Adjustment Range; Zero Adjustment Range - Emerson Rosemount 2151N Reference Manual

Rosemount 2151N

Span Adjustment Range

Zero Adjustment Range

Figure 3-3 – Graphical
Representation of Elevated Zero,
Zero Based, and Suppressed Zero
Calibrations for a Range 2
Transmitter
23
For transmitter ranges 2 to 6, the span is continuously
adjustable to allow calibration anywhere between the
transmitter URL and 1/10 of URL. For example, the span on a
Range 2 transmitter can be continuously adjusted between 25
and 250 inH O (6,22 kPa and 62,2 kPa).
2
For Range 1 transmitters, the span is continuously adjustable
to allow calibration anywhere between the transmitter URL
and 1/5 of URL. For example, the span on a Range 1
transmitter can be continuously adjusted between 5 and 25
inH O (1,25 kPa and 6,22 kPa).
2
The transmitter zero can be adjusted to achieve a maximum
90% Zero Offset for suppressed zero calibrations and -100%
Zero Offset for elevated zero calibrations. To achieve these
levels of zero elevation and zero suppression, the 2151N is
equipped with a coarse zero select jumper located on the
Electronics Assembly in the electronics housing (see Figure
3-2).
A graphical representation of three calibrations is shown in
Figure 3-3. Instructions for setting the coarse zero select
jumper are provided in the Calibration Procedures section.
The zero may be elevated or suppressed with the limitation
that no applied pressure within the calibrated range exceeds
the URL or LRL. During zero elevation, the transmitter may
be calibrated to cross zero, ex. -75 to 75 inH
18,6 kPa).
Reference Manual
00809-0000-4851 Rev AD
December 2023
O (-18,6 kPa to
2
Calibration