Varec 2500, Инструкция по установке и эксплуатации

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2500 Automatic Tank Gauge
24 Installation and Operations Manual
5. Check the pitch of the roof. Hold the coupling plumb, while welding it into the hole in the
roof.
Note Failure to place the coupling and pipe in a true vertical position may affect the
accuracy of the gauge.
6. After the coupling and pipe are checked to make certain that they are plumb, unscrew the
pipe from the coupling.
Note Make sure that the interior of all pipes are clean and corrosion free.
7. Seal the threads with pipe thread compound and reconnect the pipe to the coupling.
Tank Roof Entry - Internal Pan (Floating Roof)
1. To facilitate inspection and service of the gauge system, locate the well where gauge pip-
ing will pass over the top of the tank shell close to a stairway platform.
Note Due to the resulting gross measurement inaccuracies, Varec does not recommend
that the perforated tape/tape cable be attached directly to a floating pan. Use a covered
floatwell for the best measurement accuracy.
2. Determine the center point of the float well. Varec recommends this position is located a
minimum of 16.00 inches (406 mm) and a maximum of 36.00 inches (916 mm) from the
wall of the tank.
3. Provide the roof hole for the conduit pipework centered on this position. For installations
without guide wires, only the center hole is required.
4. Drill a small hole in the roof. Check that a line dropped through this hole is plumb to the
center point of the well. If it lines up with the center point of the well enlarge the hole to
accommodate the coupling for the 1.5-inch pipe.
5. Screw the “drop” pipe coupling into the vertical pipe nipple. This will aid in positioning the
coupling while welding.
6. Check the pitch of the roof. Hold the coupling plumb while welding it into the hole in the
roof.
Note Failure to place the coupling and pipe in a true vertical position may affect the
accuracy of the gauge.
7. After the coupling and pipe are checked to make certain that they are plumb, unscrew the
pipe from the coupling.
Note Make sure that the interior of all pipes are clean and corrosion free.
8. Seal the threads with a pipe thread compound and reconnect the pipe to the coupling.