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Sharp 5030i/5014i - Cleaning the Filter Assembly
Occasionally the filter assembly needs to be taken apart and cleaned. Gaps in the PM10 inlet screen
can allow insects and debris to get trapped in the filter chamber. Wood smoke can cause sticky
deposits to build up on the top plate. This can lead to the filter tearing or jamming.
When dismantling the filter assembly, great care needs to be taken so that the detector and its
protective film are not damaged. The following is a step-by-step procedure for cleaning the filter
assembly.
1. Turn off the instrument and unplug the power. Disconnect the heater.
2. Remove the Nephelometer (5030i only) by undoing the electrical cable, loosening the two
side screws and then lifting straight up.
3. Remove the 2-part lid, first the small filter assembly cover, then the larger lid. Set them aside.
4. Remove the two 4mm bolts holding the inlet tube in place. Slide off the green clamping
brackets and the inlet adapter. Cut the tape close to the plastic guide and then loosen the
brass knurled nut on the take-up spool and slide off the tape. See Photo 1.
Photo 1 – Remove inlet support bracket and tape
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Related Manuals for Sharp 5030i
Summary of Contents for Sharp 5030i
- Page 1 1. Turn off the instrument and unplug the power. Disconnect the heater. 2. Remove the Nephelometer (5030i only) by undoing the electrical cable, loosening the two side screws and then lifting straight up. 3. Remove the 2-part lid, first the small filter assembly cover, then the larger lid. Set them aside.
- Page 2 Remove the the knurled nut, aluminum discs, blue o-rings and back plate. See Photo 2. Photo 2 – Remove take-up spool Remove the detector cable from the amplifier. Remove the two 4mm bolts holding the detector in place. Gently lift up the detector and slide the cable through the hole. If there is a yellow temperature sensor cable going through the hole, cut the Tyrap that holds it in place and remove it first.
- Page 3 8. Once the top plate is removed, cut the filter tape near the right roller and discard the short section with the dirty spots. The design of the 5030i has the dirty tape scrape across the plastic guide (left side of Photo 4) and travel upside down across the top plate. With a damp cloth (alcohol is best), clean the guide and the top of the plate.
- Page 4 Photo 5 – Remove Inlet Tube and Clean Top of Plate Photo 6 – Clean Bottom of Plate...
- Page 5 10. The Middle Plate is usually fairly clean but give it a quick check. Look through the hole and see if there is any dirt on the Radiation Source. Generally, it is not advised to lift this plate off the “Donut” o-ring – it could cause a leak. If there is dirt that can’t be lightly blown off the Source, then try inserting a wet corner of a tissue (such as a Kim Wipe) between the two bars and gently drag it across the surface of the Source.
- Page 6 - Put a tiny bit of grease on the o-rings of the inlet adapter (threaded heater connection for the 5014i and straight nephelometer connector for the 5030i) and slide it onto the inlet tube. - Slide on the green clamping brackets and tighten the two 4mm bolts.