30
IOM-131
MODEL: LS-14
REV: F
13839 West Bellfort Street, Sugar Land, TX 77498
welker.com
Service Department 281.491.2331
3.3 Troubleshooting
Table 3: LS-14 Troubleshooting
Issues
Possible Causes
Solutions
The LS-14 will not fill to 80%.
Pre-charge pressure may not be relieving
back to the inert gas supply tank.
Ensure that valve A and valve C, if
applicable, on the inert gas supply tank
are open during composite sampling to
allow pressure to be relieved back to the
inert gas supply tank from the pre-charge
side as product enters the LS-14 (
).
The LS-14 is filling too quickly.
Pre-charge pressure may not be supplied
to the LS-14 at the appropriate pressure.
The sampler may be set at a faster
sampling frequency than desired.
Apply additional pre-charge pressure to
the LS-14 until the pre-charge pressure
reaches 50–100 psig above pipeline
operating pressure, not to exceed the
maximum allowable operating pressure
of the equipment.
Adjust the PLC to sample at the desired
rate. Ensure that the calculations used to
determine the sample frequency are
correct (
The tracker magnet is not moving.
The hydraulic or pneumatic supply may
not be directed below the actuator
piston.
Sample is leaking from the receiver
cylinder.
Ensure that the mixer lever/button is
tubed to the bottom of the actuator
cylinder.
Ensure that purge/return valve D is closed.
Check for leaks between the sampler and
the receiver cylinder and repair as
necessary.
The burst disc on the product side
of the LS-14 is leaking.
The lifespan of the burst disc may have
been exceeded.
Replace the burst disc. A more frequent
preventative maintenance schedule may
be required for the burst disc. Do not
exceed 80% volume in the LS-14 to avoid
overpressurizing the receiver cylinder.
The burst disc on the pre-charge
side of the LS-14 is leaking.
The valve on the pre-charge side of the
LS-14 may be closed.
The lifespan of the burst disc may have
been exceeded.
Ensure that valve A and valve C, if
applicable, on the inert gas supply tank
are open during composite sampling to
allow pressure to be relieved back to the
inert gas supply tank from the pre-charge
side as product enters the LS-14 (
).
Replace the burst disc. A more frequent
preventative maintenance schedule may
be required for the burst disc.
