CiDRA GVF-100 Gas Volume Fraction Monitoring System - Manual (Page 26)

Copyright © 2006 CiDRA Corporation Page 7-9
20639-01 Rev 03
CAUTION
Over-tightening of fasteners may damage threads on the sensor.
Under tightening may affect flow meter performance. Always
use the sensor fastener spacer tool to ensure proper fit of the
sensor assembly.
7.5.1 Sensor Band Short Test
Shorting of the sensor band to the process pipe may cause signal
interference or electrical faults in the system in some instances. The
sensor band must be electrically isolated from the process pipe.
Use an ohm meter and verify the sensor band is isolated from the
pipe. Measure the resistance between the sensor rails and the pipe to
ensure there is no continuity between the sensor band and the
process pipe. If the band is shorted identify where the short is located
and eliminate the short. For example, if a sensor screw is shorting to
a pipe weld bead, reposition the sensor band, or lightly file the weld
bead to eliminate the interference.