Reference Manual
00809-0100-4809, Rev CB
March 2012
Annubar Flowmeter Series
Section 4 Operation and Maintenance
Safety Messages . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . page 4-1
Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .page 4-1
RTD Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . page 4-4
Replacing an RTD . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .page 4-4
Electrical RTD Check Procedure . . . . . . . . . . . . . . . . . . . .page 4-5
Pak-lok, Flange-lok, and Flo-tap Maintenance . . . . . . . . .page 4-7
Gas Entrapment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .page 4-8
Dirt Accumulation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . page 4-8
Main Steam Line Annubar Maintenance . . . . . . . . . . . . . . page 4-10
SAFETY MESSAGES Procedures and instructions in this section may require special precautions to
ensure the safety of the personnel performing the operations. Information that
raises potential safety issues is indicated by a warning symbol ( ). Refer to
the following safety messages before performing an operation preceded by
this symbol.
Explosions can result in death or serious injury.
• Do not remove the instrument cover in explosive environments when the circuit is
live.
• Both transmitter covers must be fully engaged to meet
explosion-proof requirements.
• Before connecting a communicator in an explosive atmosphere, make sure the
instruments in the loop are installed in accordance with intrinsically safe or
nonincendive field wiring practices.
Electrical shock can result in death or serious injury.
• Avoid contact with the leads and the terminals.
Troubleshooting If a malfunction is suspected despite the absence of a d iagnostic messa ge on
the communicator display, follow the procedures described below to verify
that the flowmeter hardware and process connections are in good working
order. Alwa ys approach the most likely and easiest-to-check conditions first.
www.rosemount.com
Annubar Flowmeter Series
Symptom Possible Cause Corrective Action
Low Reading Annubar not fully installed (not
spanning the inner diameter of the
pipe)
Annubar not aligned properly in flow
profile
Annubar not installed in proper pipe
size
Annubar installed to close too an
upstream flow disturbance, such as a
pipe elbow
DP Transmitter not zeroed properly , or
not configured correctly
High Reading Annubar not installed in proper pipe
Erratic Signal / Negative
Reading / No reading
Annubar Sensor too long or
too short
size
DP transmitter not zeroed properly or
not configured properly
Annubar sensor is installed backwards
Annubar sensor is broken or missing
Instrument valves are closed
Annubar Flowmeter is mounted too
close to flow disturbance
Air in instrument impulse lines (liquid
applications)
Noisy DP signal from vertical down
steam or liquid application
Pipe dimensions were not properly
supplied
The mounting hardware supplied is not
the correct length
Annubar sensor looks too long
(Pak-lok or Flange-lok Models)
Opposite Side Support is not installed
on pipe
• Verify the actual pipe ID and wall dimensions and compare to the
Calculation Data Sheet.
• Consult Factory if dimensions do not match.
• During re-installation mark tip of Annubar, install, remove and
inspect marking to insure contact with opposite side of the pipe.
• Refer to the installation instructions in Section 2 of this manual for
proper alignement straight across pipe I.D., with upstream sensing
holes facing straight upstream in flow profile.
• Verify the actual pipe ID and wall dimensions and compare to the
Calculation Data Sheet.
• Consult Factory if dimensions do not match.
• Compare installation to recommended straight pipe run referenced
in the installation instructions in Section 2 of this manual.
• Verify DP sensor has been zeroed properly.
• Verify transmitter range is correct, and if square root output is
correct.
• Verify Annubar Calc sheet represents fluid density properly so that
transmitter is configured correctly for the application.
• Verify the actual pipe ID and wall dimensions and compare to the
Calculation Data Sheet.
• Consult Factory if dimensions do not match.
• Verify DP sensor has been zeroed properly.
• Verify transmitter range is correct, and if square root output is
correct.
• Verify Annubar Calc sheet represents fluid density properly so that
transmitter is configured correctly for the application.
• Verify that the flow arrow on the instrument connections of the
Annubar is pointing in the direction of flow.
• Remove sensor and verify that the Annubar sensing element is in
tact and undamaged.
• Verify the high and low instrument valves are open.
• Verify the installation and compare with recommended installation
distances from disturbances as shown in Installation section of this
manual.
• Reinstall impulse lines, eliminating high areas in which air can
collect.
• Relocate Annubar to a location that is not vertical down or use the
transmitter dampening to smooth out the DP signal.
• Verify the actual pipe ID and wall dimensions and compare to the
Calculation Data Sheet.
• Consult Factory if dimensions do not match.
• Check mounting height and compare to the dimensions shown in
the Dimensional Drawings.
• Consult factory if dimensions do not match.
• Verify the actual pipe ID and wall dimensions and compare to the
Calculation Data Sheet.
• Consult factory if dimensions do not match.
• Review the installation instructions found in section 2 and review
the images of a proper installation.
• Install Opposite side support (if required by Annubar model) as
specified in the installation instructions found in Section 2.
Reference Manual
00809-0100-4809, Rev CB
March 2012
4-2
Reference Manual
00809-0100-4809, Rev CB
March 2012
Symptom Possible Cause Corrective Action
Annubar Sensor won't fit in
the drilled hole
Severe Vibration of the
Sensor
Incorrect Measurement Failed RTD
Drill hole is not the proper size
Drill hole is not aligned properly with
Annubar mounting hardware
Hole was torch-cut (pipe fragments
blocking hole)
Annubar is not properly sized for the
application
The tip of the Annubar Flowmeter is
not properly bottomed for Pak-lok,
Flange-lok or Flo-tap Models
Excessive Pipe Vibration
Transmitter out of calibration
Transmitter improperly configured
Annubar Flowmeter Series
• Verify that the drill hole matches the size specified in the
installation instructions found in Section 2.
• Re-drill the mounting hole with proper drill hole size.
• Verify that the mounting hardware is centered over pipe hole.
• If necessary, re-install mounting hardware.
• Re-Drill the hole in a different location as specified in the
installation instructions found in Section 2.
• Verify process conditions on the Calculation Data Sheet are
accurate.
• Consult Factory if process conditions have changed.
• For Flo-tap models, turn crank handle until the sensor is bottomed
per the installation instructions found in Section 2.
• For Pak-lok and Flange-lok models, tighten the nuts per the
installation instructions found in Section 2.
• Check vibration on pipe and install additional supports for Annubar
if necessary. Consult factory.
• See maintenance section for removal and testing of RTD element.
• See calibration procedures for the appropriate style transmitter.
• Verify flow configuration information for MultiVariable(TM) Mass
Flow transmitters or scaled variable information for 3051S DP
transmitters.
• Also verify the 20 mA point set in the transmitter corresponds to
the 20 mA point in the conrtol system.
4-3
Loading...