Ametek Land 4500 MKIII, User Manual

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Opacity and Dust Monitor
User Guide
Model 4500 MkIII
A - 6
A3.4 Installing the Mounting Flanges
The Model 4500 MkIII is supplied with two mounting flanges with stand-offs
(standpipes) used to mount the Transmissometer onto the stack or duct.
1) Each standpipe is 128mm (5.04in) long.
2) Accurately mark the centre of each mounting flange on the stack and
punch a locating mark through the liner onto the inner stack plating.
3) On both sides of the stack, cut a hole from the liner large enough to
allow welding of the mounting flange to the stack.
4) Where the Transceiver will be installed, cut a hole through the stack at
the punched location mark.
5) Where the Retro-Reflector will be installed, make a 6mm to 12mm
diameter pilot hole (0.25in to 0.50in)
A3.3 Maintaining the path length during installation
The installation path length is defined as the distance between the outer
faces of the mounting flanges of the transceiver and retroreflector. This is
somewhat greater than the stack flange-to-flange path length, to allow for
optical alignment. The length of accessories such as spoolpieces or fail-
safe shutters also increases the installation path length relative to the stack
flange-to-flange path length.
The installation path length must be specified at the time of order
and the instrument is factory set for this path length.
The installation path length is indicated on the back of the Transceiver.
During the welding and alignment procedures the flange-to-flange
measurement path must not change by more than ±1%, otherwise the
accuracy of the measurement readings may be affected.
Flange to flange path length
Transceiver Retro-reflector