7
and fluid density should be considered to insure any type of harmful harmonics are produced
(Call ISS Ltd for harmonic calculation if required)
.
When the probe is to be installed flush with the ID of the pipeline so as to accommodate pigging,
several factors must be considered. First, it is recommended that the fixture (i.e., weldolet) in
which the tip of the probe (i.e., the sensor element) will reside be of sufficient diameter and suit-
able location such that fluid turbulence will provide adequate sampling. If this fixture is too small,
fluid stagnation could occur resulting in a failure of the system to detect the interface. It is there-
fore recommended that the probe inser-
tion weldolet be at least 1” in diameter
so that adequate mixing takes place
thus allowing for very rapid interface
detection. It is also important that the
weldolet bit size be as large as possi-
ble. Too often, it has been observed
that a large weldolet was installed but
that the hole
bored through the pipeline
was very small.
The location and orientation of the
probe insertion weldolet is also impor-
tant. Placing the probe near an elbow
in the line will provide greater turbu-
lence and more rapid interface detec-
tion. Insertion of the probe in the top of
the pipeline should be avoided since a
vapor pocket could develop in the wel-
dolet. Insertion from 45° from vertical to the side is preferable, though care must be taken to
provide sufficient clearance for convenient installation and removal.
Some general recommendations for probe location and orientation are as follows:
1.
Try to mount the FuelCheck probe in a location where the pipe is always full, even when
the line is not flowing.
2.
NEVER mount the FuelCheck probe on a densitometer loop.
3.
Never mount the probe on the top of the pipe since vapor can get trapped there.
4.
Never mount the probe on the bottom of the pipeline because the threadolet can become
filled with dirt, rust, or other particles from the pipeline.
Probe Insertion and retraction
The
FuelCheck
®
Probe has been designed to be safely inserted into and retracted from the
process. These instructions must be followed to prevent injury and damage to the equipment.
Figure 5
Suggested Probe Installation Method
Содержание FuelCheck
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Страница 23: ...22 11 2 19 4 42 7 29 4 10 0 0 Figure 31 FuelCheck Control front view Figure 32 FuelCheck Controller inside view...
Страница 24: ...23 19 5 11 5 6 0 2 25 2 5 Figure 33 FuelCheck Controller mounting dimensions...
Страница 34: ...33...
Страница 35: ...34 APPENDICES...
Страница 36: ...35 APPENDIX A Warranty and Disclaimer...
