PULP & PAPER
ROSEMOUNT 8700 MAGMETER
Pulp and Paper Supplier Reduces Maintenance
Cost with Ground / Wiring Fault Diagnostic
RESULTS
• Improved Reservoir and Production Management
• Reduced Health Safety and Environmental Risk
• Reduced Operations Cost
The Ground / Wiring diagnostic
reduced maintenance time allowing this mill to get back online
faster.
APPLICATION
Aluminum Sulfate Flow
CUSTOMER
Leading global supplier of pulp and paper products
CHALLENGE
During mill start-up after a week long maintenance shutdown,
operators noticed the aluminum sulfate measurement was not
responding as expected. Aluminum sulfate controls the pH level and
additive retention in the paper. The combination of aluminum sulfate
and additives is required to increase the bonding of the fibers to
create a strong paper.
Correct aluminum sulfate measurement is critical to producing
quality paper. Since this measurement is just upstream of the paper
machine, an inaccurate flow measurement results in reduced quality
and decreased paper strength.
An older magnetic flowmeter on the aluminum sulfate line was
replaced during the week long maintenance shutdown. When the
new magnetic flowmeter was installed, it was not properly wired.
Incorrect wiring caused electrical noise to be picked up by the
electrodes and decreased the stability of the transmitter output.
Rosemount 8700 Magnetic Flowmeter.
For more information:
www.rosemount.com
© 2013 Rosemount Inc. All rights reserved
PULP & PAPER
SOLUTION
To investigate the problem, an instrumentation technician was assigned to troubleshoot
the meter. Since the installed meter was a Rosemount 8700 Magnetic flowmeter with
the ground / wiring diagnostic option enabled, the LCD immediately informed the
technician there was a “Ground / Wire Fault.” With this information, the technician
reviewed the wiring and found a wire’s shielding incorrectly connected to an active coil.
The wires were then connected to the correct terminals, and power was re-applied to
the flowmeter. A correct and stable flow measurement was restored.
The ground / wiring fault detection diagnostic allowed this customer to eliminate time
consuming troubleshooting procedures by immediately directing the technician to the
source of the problem. This saved the technician hours of maintenance costs. Finally,
with a stable aluminum sulfate measurement, the mill was saved from producing offspec paper.
RESOURCES
Emerson Process Management Pulp & Paper Industry
http://www2.emersonprocess.com/en-US/plantweb/customerproven/Pages/
PulpPaper.aspx
Rosemount E-Series Magnetic Flowmeter Transmitters
http://www2.emersonprocess.com/en-US/brands/rosemount/Flow/MagneticFlowmeters/E-Series-Transmitters/Pages/index.aspx
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Emerson Process Management
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