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Operation Manual HORIBA APDA-371
Particulate Monitor
Date:
April, 2010
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HORIBA Europe GmbH, Julius-Kronenberg-Str. 9, D-42799 Leichlingen,
: +49(0)2175-8978-0,
: +49(0)2175-8978-50
Page 10
heater is a cylinder which installs on the inlet tube two inches above the top of the inlet receiver of the APDA-
371. If the APDA unit is to be mounted high in the rack, it may be necessary to make the hole in the top of the
rack larger in order to clear the heater diameter. The heater is supplied with an insulation tube cover which may
be modified as needed. Make sure these parts are going to fit before installing the APDA-371.
Rack top modifications for inlet tube clearance
2.5
Installation Instructions in a Walk-In Shelter
Installation of the APDA-371 should be performed by personnel familiar with environmental monitoring equipment.
There are no special precautions or handling concerns except for the normal level of care required for handling
scientific equipment. Refer to the diagrams on the following pages.
1.
Roof Modifications: Determine the exact location where the APDA inlet tube will pass through the roof of the
enclosure, and drill a 2 ¼” or 2 ½” diameter hole through the roof at that location. Make sure the hole is directly above
where the APDA inlet receiver is to be located, as the inlet tube must be perfectly vertical. A plumb-bob is useful for
determining where to locate the hole. Note: The inlet receiver on the APDA is slightly to the left (0.6 in, 15 mm) of the
center line of the unit. See diagrams.
2.
Waterproof Flange: Apply all-weather caulking around the top of the hole, and install the BX-801 roof flange
onto the hole. It is usually best if the threaded barrel of the flange assembly is installed downward, into the hole. Secure
the flange in place with four lag bolts or self-tapping screws (not supplied). Caulk around the screws to prevent leaks.
Apply Teflon tape to the threads of the gray plastic watertight fitting, and screw it into the roof flange.
3.
Inlet Tube: Remove the white cap and rubber seal from the flange assembly. This makes it easier to install the
inlet tube, as the rubber seal is a tight fit around the tube. Lower the inlet tube through the flange assembly in the roof
and into the inlet receiver on the APDA Make sure the inlet tube is fully seated.
4.
Inlet Alignment: It is very important for the inlet tube to be perpendicular to the top of the APDA. The nozzle
may not close properly if there is binding caused by misalignment. A simple check is to rotate the inlet tube back and
forth by hand (before tightening the roof flange seal or the APDA inlet set screws). If the inlet tube is installed straight,
then the tube should rotate fairly easily while inserted into the APDA. If it does not rotate, check the inlet tube for vertical
alignment or move the APDA slightly.
5.
Smart Heater: Before tightening the inlet tube in place, the BX-827 or BX-830 smart inlet heater (used on most
APDA-371 units) must be installed on the tube. Pull the inlet tube up out of the inlet receiver, and pass the tube through
the hole in the heater body (the cable end is the bottom). Then re-insert the inlet tube into the APDA. Position the
bottom of the heater unit two inches above the top of the inlet receiver on the APDA, and securely tighten the two set
screws in the heater to fasten it to the tube. Included with the smart heater is a 12” tube of insulation. The tube is split
down its length for easy application. Wrap the insulation around the heater body and peel back the adhesive cover strip
to secure in place. The insulation may be cut to fit if needed.
6.
Inlet Tightening: Slide the black rubber seal and white cap down over the top of the inlet tube and into the roof
flange. It is easier if you wet the rubber seal with water or alcohol first. Tighten the white plastic cap.
7.
Support Struts: The BX-801 inlet kit usually comes with two angled aluminum struts to support the inlet tube
above the roof and prevent the inlet from moving in the wind. These struts are typically fastened (about 90 degrees