FB1100/FB1200 Flow Computer End Cap Field Replacement Guide
D301814X012
November 2020
Replacing the End Caps
UL Listed End Cap Field Installed Accessory Kit for Use in Class I, Division 1, Groups C, and D; and
Class I, Division 2, Groups A, B, C, and D
WARNING
EXPLOSION HAZARD –When replacing end caps, inspect the housing threads for damage. If
housing threads are damaged such that you cannot properly seal the end caps, you cannot
operate the flow computer in a hazardous area. You must return the flow computer to Emerson
for repair or replacement.
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Front End Cap (unscrewed)
Flow Computer End Cap with Window Field Installed Accessory Kit Part No. 399122-01-0 and
Flow Computer End Cap without Window Pack Field Installed Accessory Kit Part No.
399123016-KIT for Use with UL Listed Class I, Division 1, Groups C, and D; and Class I,
Division 2, Groups A, B, C, and D Model Series FB1100 and FB1200.
Grasp the end cap (front or rear).
When replacing the end cap, carefully align the end cap threads with the threads of the
enclosure and replace the front end cap.
Important
When replacing the rear end cap, ensure wires connecting to the terminal plate do not get
crimped or caught between the end cap threads and the enclosure.
Screw the end cap clockwise (eight full turns) until it is tightly sealed to the enclosure. End
caps must have at least 8 full threads engaged upon reassembly.
Note
If you need more leverage, place a long screwdriver or other appropriate tool across the two
notches in the end cap to act as a pry bar.
If applicable, tighten the retaining clamp using the screw and washer onto the end cap using
a 3mm hexagonal wrench. When tightening, torque to 10 to 12 in-lbs (1.1 to 1.4 N-m).
Rear End Cap (unscrewed)
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