CiDRA SONARtrac GVF-100 - Manual (Page 26)

Copyright © 2006 CiDRA Corporation Page 7-8
20675-01 Rev 02
connector as described later in the manual. If necessary, use a piece
of tape to temporarily retain the connector on the band so it will be
positioned directly below the sensor cable access panel. The final
sensor band assembly is illustrated below.
Figure 11 Installed Sensor Band
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.
Sensor cable installed
in cable retaining clip
Sensor screws
tightened Sensor cable connector with
shorting plug installed
Alignment pins