Det-Tronics OPECL Infrared Hydrocarbon Gas Detector - Manual (Page 19)

17 95-8556 10.1
StaRtup
When the OPECL is installed and wired as described in
the “Installation” section, it is ready for commissioning.
If the application requires that specific changes be
made to the factory settings, HART communication will
be required.
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ensure that alarm devices are bypassed during
commissioning.
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The safety function (gas input‑to‑actuation/
notification) must always be verified upon
completion of installation and/or modification.
aliGnmEnt
OvERvIEW
The OPECL modules must be properly aligned before
normal operation will be attained. Alignment consists of
a basic alignment stage and a fine alignment stage:
1. basic alignment procedure. This procedure
requires the Telescope Alignment Kit p/n 009104-
001. It does not require a handheld HART Field
Communicator.
2. fine alignment procedure. This procedure requires
a handheld HART Field Communicator with the
OPECL Device Descriptor (DD) software driver (refer
to Appendix F). The fine alignment procedure is
required whenever maximum optical signal strength
is required.
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Basic Alignment must be successfully completed
before attempting Fine Alignment.
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Refer to the FM, ATeX, or IeCex Appendix for
information regarding the effect of misalignment on
system accuracy.
Important
Upon completion of system alignment, ensure that
aLL bolts on the oPeCL mounting bracket are
properly tightened, including the two on the back
side.
baSIC alIgNmENT pROCEDURE
Equipment Required
1. Properly installed and powered OPECL system
(transmitter and receiver). Easy access to both
modules is highly recommended.
2. Telescope Alignment Tool p/n 009104-001. The
telescope alignment tool is recommended for use in
commissioning all OPECL systems. The following
instructions cover the use of the Telescope Alignment
Tool.
3. Calibration Magnet.
4. For installations with module separation distances
between 5 and 30 meters, the range reduction
aperture kit (supplied) is required. Refer to “Aperture
Kit for Short Range Applications” section in this
manual for details.
Remove operating power from the OPECL Transmitter,
and then complete the following steps:
1. Ensure that the system modules are located within
the specified separation range and securely fixed
to the support structures. Bypass all external gas
alarm devices that are connected to the receiver
outputs.
2. Ensure that the system modules are installed with
their windows at approximately the same height
above grade. Each module should be roughly
aligned to face in the direction of the other module.
3. Loosen the locking nuts on the alignment adjuster
bolts so that the bolts can be freely tightened or
loosened for alignment purposes. Loosen, then
hand-snug the two vertical alignment locking nuts.
See Figure 18. At this point, the unit should be easily
adjustable in the vertical and horizontal positions
with little or no adjustment slop.
4. Hand-tighten all four adjustment bolts until the
alignment plate is stabilized.
5. Loosen the brow assembly and slide it toward the
rear of the module.