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• Carefully insert the large diameter open end of the metal cyclone into the other
cup on the opposite side of the sensing chamber. The cyclone inlet (small short
metal tube on side of cyclone) can be oriented as desired (upwards, as shown in
Figure 2, sideways, downwards, etc.). Ensure that the cyclone is fully inserted
into the cup;
• When ready to operate, connect a length of tubing between the barbed fitting at
the downstream end of the plastic filter holder and the pump to be used in
combination with the pDR-1200.
• Perform a zeroing sequence (see Sections 6.5.2 and 8.1) before starting a run.
This completes the conversion of the pDR-1000AN to the pDR-1200.
15.2
Conversion Procedure from pDR-1200 to pDR-1000AN
To effect this conversion use model pDR-UB conversion kit. As you remove parts
from the pDR-1200, in order to attach the conversion kit components, store these
parts carefully for possible future re-conversion. Proceed as follows:
• Pull off both the cyclone and the filter holder from their respective cups on the
two sides of the sensing chamber;
• Loosen the two screws that hold each of the two cups on the sides of the sensing
chamber (total of 4 screws), and remove the two side cups;
• Loosen the single screw on each of the two (front and back) gasketed sealing
covers enclosing the sensing chamber, and remove the two covers;
• Identify the two flat sensing chamber cover plates provided in the conversion kit;
one face of each of each of these two plates has a dull black finish
(antireflective); avoid touching those surfaces;
• Position one of the two sensing chamber cover plates over the open front of the
sensing chamber with the dull surface on the inside, and such that the hole in the
plate is aligned with the corresponding threaded mounting hole on the upper wall
of the sensing chamber. Insert and tighten firmly black socket head screw
provided with the conversion kit, making sure that the plate is aligned perfectly
with the top of the sensing chamber. Similarly, attach the other cover plate to the
rear of the sensing chamber, with the dull surface facing inward;
• Loosen and remove the two small screws on the top surface of the sensing
chamber;
• Position large protective bumper (provided in the conversion kit) over sensing
chamber pushing down until properly seated. Insert the two top screws (two
shiny Phillips-head screws provided in the conversion kit) into the two holes in
the bumper while holding down the bumper, and tighten gently (do not over-
tighten) making sure that the heads of these screws are well inside their cavities
in the bumper;
• Perform a zeroing sequence (see Sections 6.5.1 and 8.1) before starting a run.
This completes the conversion from a pDR-1200 to a pDR-1000AN.
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