Emerson Rosemount 3152 - Page 36

Rosemount 3150 Series
Reference Manual
00809-0100-4835 Rev BE
February 2018
27
Calibration
Span Adjustment Range
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
2
O (6,22 kPa and 62,2 kPa).
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
2
O (1,25 kPa and 6,22 kPa).
Zero Adjustment Range
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 3150 Series
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
2
O (-18,6 kPa to
18,6 kPa).
Figure 3-3 – Graphical
Representation of Elevated Zero,
Zero Based, and Suppressed Zero
Calibrations for a Range 2
Transmitter