Rosemount Manual Supplement: Rosemount APEX and APEX Sentry-Installing the APEX Radar Gauge with Process Window Manuals & Guides

Manual Supplement

00809-0300-4731, Rev AA
August 2003

Rosemount APEX and APEX Sentry

Installing the APEX Radar
Gauge with Process Window

Installing with a
Process Window

If you are installing the gauge with a process window, refer to
Figure 1-1 on the reverse side of this document and follow these steps:

NOTE

Make sure the metal gaskets are installed and the flange bolts are torqued
properly to keep moisture out of the spool piece. Bolts should be re-tightened
24 to 48 hours after initial installation.

1. Seat the process O-ring (7) into the groove on the window (6), and center
the window on the process flange without letting the
O-ring slip out of its position in the groove.

2. Make sure that the EMI gasket (8) is seated in the stainless steel window
ring (5), place the window ring over the window, and center a
spiral-wound gasket (4) over the window ring.

3. Center the standoff pipe or spool piece (2) on the flange. Put two of the
bolts (9) in opposite sides and hand tighten. Look inside
the spool piece to verify that the Teflon
the flange.

4. Once the Teflon window is centered, use the rest of the mounting bolts
and nuts to finish attaching the spool piece to the tank flange. A
misaligned window will severely hinder gauge performance. See
Figure 1-2 on the reverse side of this document. Tighten the bolts to
75-100 ft-lb (102-136 N-m).

5. Center the second spiral-wound gasket (4) on top of the standoff
pipe/spool piece.

6. Attach the radar gauge (1) to the standoff pipe or spool piece using the
bolts and nuts as shown. Tighten the bolts to
75-100 ft-lb (102-136 N-m).

®

window is centered on

www.rosemount.com

NOTE

When a process window is used, the window and spool piece heights will
need to be incorporated into the Reference Gauge Height and Upper Null
Zone. Refer to the product manual (document number 00809-0100-4731) for
more information.

It is possible to use a standoff pipe/spool piece supplied by a source other
than Rosemount; however, it is suggested that when the APEX and APEX
Sentry Radar Gauges are mounted, the end of the antenna be no more than
1-inch from the face of the window.

Rosemount APEX and APEX Sentry

Figure 1-1. Diagram for Installation
with a Process Window

1. Radar Gauge

Manual Supplement

00809-0300-4731, Rev AA

August 2003

NOTE:
Window assembly must be
centered in standoff
pipe/spool piece to ensure
proper performance.
See Figure 1-2.

9. Mounting Bolts/Nuts

5. SST Window Ring

8. EMI O-Ring

7. Process O-Ring

Figure 1-2. Window Centering –
Radar Gauge with Installed Isolation
Window.

4. Spiral-wound

Gasket (non-wetted)

2. Standoff Pipe or Spool
Piece (non-wetted)

4. Spiral-wound

Gasket (non-wetted)

6. Teflon Window

3. Process
Flange

Cross-Section of

Installed Process Window

Spiral-wound
Gasket

Process

O-Ring

SST
Window Ring

EMI
O-Ring

Teflon
Window

S-2

Tank Nozzle

Common Center
Line for Antenna

and Window

Spool Piece

Correctly Aligned

PTFE Window
and Process
Wetted O-ring

Tank Nozzle

Spool Piece

Incorrectly Aligned

PTFE Window
and Process
Wetted O-ring

Center Lines for

Antenna and Window

should be the same