Reference Manual
00809-0100-4835 Rev BD
July 2016
Rosemount 3150 Series
3-2
WARNING
Process leaks could result in death or serious injury.
•
Install and tighten all four flange bolts before applying
pressure.
•
Do not attempt to loosen or remove flange bolts while the
transmitter is in service.
WARNING
Replacement equipment or spare parts not approved by Rosemount
Nuclear Instruments, Inc. for use could reduce the pressure retaining
capabilities of the transmitter and may render the instrument
dangerous or adversely impact its qualified status.
•
Use only components supplied with the 3152, 3153 or 3154
transmitter or designated by Rosemount Nuclear Instruments,
Inc. as spare parts for the 3152, 3153 or 3154.
NOTE
The pressure unit “inches H
2
O @ 68ºF (20ºC)” is used throughout this
section. For ease of reading and to conserve space, this pressure
unit will be abbreviated to “inH
2
O”.
CALIBRATION OVERVIEW
Calibration Considerations
Review this section to become familiar with the fundamentals of
calibrating the Rosemount 3150 Series transmitter. Contact
Rosemount Nuclear Instruments, Inc. with questions regarding
calibrations that are not explained in this manual.
Rosemount 3150 Series transmitters are factory calibrated to the range
shown on the nameplate (see Figure 1-1). This range may be changed
within the limits of the transmitter. Zero may also be adjusted to elevate
(for all models except absolute pressure reference) or suppress (for all
models). Calibrations that have a lower range value below zero are
termed zero elevated while calibrations that have a lower range value
above zero are termed zero suppressed.
The zero and span are adjusted during calibration using zero and span
adjustment screws. The adjustment screws are accessible externally
and are located behind the access cover plate on the side of the
electronics housing (see Figure 3-1). Transmitter output increases with
clockwise rotation of the adjustment screws. For normal calibration
adjustments, the zero adjustment screw has negligible effect on the
span and the span adjustment has negligible effect on the zero.
For large amounts of zero adjustment, a course zero selection jumper is
provided. The jumper is located on the electronics assembly,
accessible within the electronics housing as shown in Figures 3-1 and
3-2. Models ordered with optional output damping will have a damping
adjustment potentiometer located on the amplifier board (see Figure 3-
2).
Procedures for calibration, including setting the course zero selection
jumper and optional damping adjustment, are provided later in this
section.
Summary of Contents for 3152
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