OFITE, 11302 Steeplecrest Dr., Houston, TX 77065 USA / Tel: 832-320-7300 / Fax: 713-880-9886 / www.ofite.com
71
Symptom
Cause
Remedy
Leaks (Continued)
The test cell is
leaking cement
The o-ring has been
damaged
The o-ring has come out of
the groove
The metal seal ring is upside
down
Replace the o-ring
Reseat the o-ring
Make sure the pointed end
of the metal seal ring is
installed with the narrow
side away from the o-ring
(see diagram on page 23)
Weak or
intermittent
transit time
signal during
calibration or
test
Dirty transducers or
transducer cavity
Worn transducer cables and/
or BNC connections
Excessive transducer
couplant used
Degraded transducers
Couplant used is not rated
for the test temperature
Remove and clean both
the transducers and
transducer cavity.
Remove and check the
cables for kinks and
connections for dirty
or worn area. Clean or
replace as necessary.
Clean transducers
Replace transducers
Remove and clean the
transducers and reapply
the proper couplant
Drag Check (SGSM Only)
If the Peak
Values are
not consistent
between tests
with just the
Head Assembly
versus test in
water
Load cell is out of calibration
(only for #120-58)
The Magnet Shaft Assembly
(#120-58-010) is bent
Bushings may be damaged
or worn
First, calibrate the Load
cell (see page 72).
Disassemble the
SGSM cell cap and make
sure the shaft is not bent.
Inspect the bushings for
damage or wear. Replace
any damaged or worn
components and run the
drag check again.