Repeat calculation until monitor screen value is within +1 percent of desired reading.
If desired reading cannot be obtained, notify shift leader or bargemaster that liquid level indicator ROLI
transmitter must be replaced and that IGS should be notified.
Empty ballast tank as given in paragraph 3-6.2.
Tag and disconnect all electrical wires.
Disconnect two pipe unions connecting liquid level indicator to tank. Remove indicator.
Remove liquid level indicator.
Disassembly and repair.
Unclamp ROLl transmitter.
Unclamp flag channel assembly from casing.
Remove top and bottom end caps and remove float assembly from inside of casing. Flush clean
inside of casing with drinking water and wipe clean float assembly.
Wipe clean flag channel assembly.
Reinstall new ROLI transmitter, visual flag channel assembly, and switches as necessary. Orient
parts as shown in Transamerica Delaval Drawing No. 87707 in Appendix B.
Install liquid level indicator with two unions to tank.
Connect all electrical wires tagged previously.
Refill tank and recalibrate liquid level sensor as given in paragraph 4-188.8.131.52.
4-7.2.16 Piping and valves. Replace piping or valves, or repack worn or damaged valves according to procedures in