Optical Scientific Inc
OFS 2000CW User’s Guide
P/N 1910-905
Rev. 03/28/13
13
OFS
Transmitter
OFS Flange Adapter
Customer Mounting
Flange
Stack
Wall
2.3 Flange Alignment Guidelines
The OFS 2000CW is designed to function in difficult industrial environments and will operate satisfactorily in
adverse conditions. It can operate over a broad range of media opacity with little or no change in accuracy.
However, these advantages can be completely negated if the transmitter and receiver cannot be aligned
properly
– meaning that the receiver cannot “see” the light beam from the transmitter sufficiently well for proper
response.
The first step to getting the most out of your sensor is making sure the mounting flanges are aligned properly.
The OFS 2000CW
is designed to mount to common ANSI 150# 4“ pipe flanges. These flanges must be
installed:
diametrically opposite each other
on a level horizontal plane
squarely aligned on the same axis
Proper care in mounting the flanges to the stack will
pay off many times over.
There is no need to measure and know the path length
for an OFS meter, which is required (for example) when
mounting an opacity meter. Therefore, in this regard,
mounting an OFS is simpler.
Alignment need not be micrometrically precise, but it
must be done so that the axis of the transmitter and the receiver are aligned on the same centerline. The
method of determining placement and alignment of the mounting flanges is the responsibility of the customer
personnel or contracted service technicians.
Careful “eyeball” reference should suffice, but use of spirit levels, laser pointers, and other such alignment
tools is recommended. Sensible precautions and attention to detail should be all that is required to complete
the job properly.
We recommend that the user study:
OFS 2000
User’s Guide “Installation Considerations”
OSI Brochure “OFS Placement Advantage”
A typical basic installation is shown here
at right. The OFS Transmitter and
Receiver are supplied with flange
adapters to mate t
o the customer’s
mounting flange. The customer’s flange is
typically cemented or welded in place.
The inner end may be flush with the wall,
or protrude depending on customer
needs. [See Section 2.5
“Flange Pipe
Extension
”]
Figure 2.3 Flange Installation (cutaway)