Masoneilan SVI II ESD Installation and Maintenance Manual
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© 2017 Baker Hughes, a GE company, LLC. All rights reserved.
Optional Display and Pushbuttons
The optional display and buttons are mounted on SVI II ESD cover plate. Three pushbutton
switches operating in conjunction with the display permit reading and modification of
instrument operating parameters without a PC or HART
®
handheld communicator. These
switches perform generic functions - Increase, Decrease, and Accept - by movement through
a conventional menu structure. Switches are operated in a hazardous environment without
compromising the flameproof enclosure.
SVI II ESD Maintenance
Repair and Replacement
Repairs can be made only by factory authorized personnel trained to repair Safety Devices.
WARNING
When working on safety rated equipment appropriate risk
reduction safety measures should be in place.
A conservative approach is taken in estimating the service interval for the digital valve
controller in Safety Instrumented Systems. For SIS applications, preventive
maintenance should be performed on the SVI II ESD five years from date of shipment if
the average daily ambient temperature is below 60° C (140° F). For applications where
ambient temperature exceeds 60° C (140° F) for extended periods, reduce this
maintenance interval based on plant experience.
SVI II ESD preventive maintenance consists of replacing gaskets, O-rings in the device
and a visual inspection of moving components to verify satisfactory condition.
Following maintenance, the SVI II ESD must be reinstalled on the valve actuator and
calibrated per the procedures in this manual. After calibration, The SVI II ESD functional
safety must be validated. All maintenance procedures must be performed only by
factory authorized personnel trained to repair Safety Devices.
Should alarms or alerts be detected during operation, maintenance or periodic
inspection and test, immediately take corrective action according to the
troubleshooting and repair procedure.
Содержание SVI II ESD
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