Teledyne 4250, Installation And Operation Manual, Page: 147 / 204

4250 Flow Meter
Section 5 Maintenance and Service
5-7
Figure 5-5 Low Profile Probe With Transducer Housing
Revealed
5.3.4 Cable Inspection Periodically inspect the AV sensor cable for wear caused by abuse
or exposure to the elements. Damaged cables can affect the oper-
ation of the probe, particularly if the reference port vent tube
inside the cable is collapsed or blocked. Unless the damage is
very close to the connector, which can be replaced, a probe with a
damaged cable is not repairable.
Keep connectors clean and dry. Although connectors are sealed, if
moisture penetrated a loose connection or uncapped connector,
the connector and/or probe could be ruined. In permanent instal-
lations, install the cables so they are not at risk of damage result-
ing from other activity taking place in the area.
In temporary installations, do not leave cables lying around
where they may be run over by heavy equipment. Do not leave
extra cable loose in the flow stream where it can tangle and trap
debris.
In permanent installations, cables repeatedly subjected to rough
environments will fail and should be installed in conduit for pro-
tection. The conduit will have to be large enough to pass the con-
nector.
CAUTION
Avoid putting heavy pressure on the probe cable or making
sharp bends in it when installing or servicing the probe. Exces-
sive pressure may collapse the cable, crushing the reference
vent tube. Sharp bends may cause the cable to kink, also
blocking the vent.
When securing the cable with plastic cable ties, tighten them
only enough to secure the cable; do not tighten them so much
that the cable jacket is visibly deformed.