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‡ SIGNET
2550 InsertionMagmeter
3.
Installation
The linearity and accuracy of the 2550 depend on precise
alignment and insertion depth of the sensor in the pipe and
accurate measurement of the pipe dimensions. The installation
tool (3-2550.355) is recommended for best results.
3.1 Sensor location
Select a location for the sensor where the flow profile is fully
developed and not affected by any disturbances. A minimum of
10 pipe diameters of straight run upstream and 5 diameters
downstream is recommended. Some situations may require 20
pipe diameters or more upstream to insure a fully developed
turbulent flow profile.
The 2550 is sensitive to air bubbles at the electrodes. If there is
any question that the pipe is absolutely full, mount the sensor at
a 45
°
to 135
°
angle. The magmeter requires a clearance of
approximately 16 in./400 mm for removal.
3.2 Preparing the pipe
1.
Cut a 2.125 in.
±
1/16 in. (54 mm
±
1.6 mm) opening in the
pipe. Carefully debur the hole for best results.
2.
Install a standard 2 in. saddle or weld-on fitting on the
pipe. Welded fittings should be installed by qualified
personnel. The threads must be perpendicular to the pipe
within 1
°
for proper performance.
10 x id
5 x id
15 x id
5 x id
Reducer
Flange
20 x id
5 x id
Inlet
Outlet
Inlet
Outlet
90° elbow
Inlet
Outlet
Measure and record the interior diameter of the pipe. This value
will be required to calibrate the 2550.
Interior diameter: ________________________________
3.3 Sensor Installation with tool
WARNING:
Do not remove safety ring or adjustment nut
from sensor.
The installation tool (3-2550.355) simplifies installation and
insures proper insertion depth for maximum accuracy.
1.
Set installation tool angle plate (1A) on pipe next to fitting.
Insert adjusting slide (1B) into top of angle plate.
2.
Place height gauge (2A) short end inside pipe and pull up
against inside diameter of pipe. Insert height gauge long
end into slot in adjusting slide. Tighten wing nut (2B) to hold
adjusting slide in place against angle plate. Remove height
gauge from pipe.
Installation Tool
Front View
1A
1B
FLOW
PIPE I.D.
2A
Process Pipe
Cutaway Side View
2B
3A
Process Pipe
Cutaway Front View
3B
Adjustment
Nut
3.
Loosen the three bolts at top of 2550 adjustment nut (3A).
Wrap the adjustment nut threads with three full wraps of
sealing tape and insert sensor into fitting until base of the
electronics enclosure is resting on top of adjusting slide
(3B). Be sure cable ports are pointing downstream. Thread
adjustment nut securely into pipe. Tighten all three bolts to
secure adjustment nut.
The 2550 Magmeter weighs 11 lbs. Care must be taken
to properly support the unit with straps and/or bracing
when necessary.
*
Additional connector sizes available
from Hubbell Inc.:
