1 installation, 1, 943-27-31 detector to be installed, Detector mounting hardware – Fluke Biomedical 940-513 User Manual
Page 13: 1, p/n 943-27-47, detector mounting flange, O-ring lubricant, dow corning #55, or equivalent, 1, p/n 943-27-48, adaptor flange, 6, p/n 5-795, #10 split washes, stn stl, 1, 5/32 hex head bit or t-handle tool, 1, dial caliper with depth gage, 6 inch, 1, marking pen or pencil
Operation
Installation and Set-up
3
3-1
Section 3
Installation and Set-up
3.1 Installation
The following materials are needed to remove or install the Model 943-27-31 detector into the
Model 940-513 Sampler:
1, 943-27-31 detector to be installed
Detector mounting hardware:
1, P/N 943-27-47, Detector Mounting Flange
1, P/N 46-103, Quad lobed seal (Detector mounting flange to Adapter flange)
O-Ring Lubricant, Dow Corning #55, or equivalent
6, P/N 5-1026, 10-32x0.5 Socket head cap screws, Stn Stl
1, P/N 943-27-48, Adaptor Flange
1. P/N 46-104, Quad lobed seal (Adapter flange to sampler body)
6, P/N 5-994, 10-24x0.75 Socket head cap screws, Stn Stl
6, P/N 5-795, #10 split washes, Stn Stl
1, 5/32 Hex head bit or T-handle tool
1, Dial Caliper with depth gage, 6 inch
1, Marking pen or pencil
3.1.1 Mounting
WARNING
Due to the potential for high activity radioactive
gasses in or around the vicinity of the detector,
protective Clothing should be worn while installing or
removing the detector,
Proper installation of the Model 943-27-31 Detector requires inserting the detector into the sample volume
until it stops against the Gas Chamber plug, inside the sampler. Once the detector has been fully
inserted, the detector is then withdrawn a distance of 0.25 inches. This will replicate the installation
method used during the sampler’s primary isotopic calibration, and the efficiency documented in the
primary isotopic calibration report 958.350. The following procedure is recommended to obtain the
required 0.25 inch detector withdrawal distance.
3.1.1.1
Turn OFF the high voltage power supply for the detector by turning the controlling Local
Control Unit power OFF.
3.1.1.2
Remove the two (2) Thumb Screws and flat washers retaining the P/N 841A-123-16
Detector Plug and remove the plug. Retain the parts removed for future re-installation.
3.1.1.3
Loosen the six (6), 10-32 x 0.5 in detector flange mounting screws that provide a
pressure retaining seal between the detector and the detector mounting flange.