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OPERATION MANUAL
PUF SAMPLER
Envirotech Model APM 460 PUF
Application
• Monitoring of Polycyclic Aromatic Hydrocarbons (PAHs)
• Monitoring of Pesticides and Polychlorinated Biphenyls
(PCBs)
Envirotech Instruments Pvt. Ltd.
A-271, Okhla Industrial Area, Phase-1, New Delhi – 110020
Tel No. 011-26813887, 26814139 Fax No.011-26811833/26810591
email
envirotech@vsnl.com
website
www.envirotechindia.com
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Summary of Contents for Envirotech Instruments APM 460 PUF
- Page 1 OPERATION MANUAL PUF SAMPLER Envirotech Model APM 460 PUF Application • Monitoring of Polycyclic Aromatic Hydrocarbons (PAHs) • Monitoring of Pesticides and Polychlorinated Biphenyls (PCBs) Envirotech Instruments Pvt. Ltd. A-271, Okhla Industrial Area, Phase-1, New Delhi – 110020 Tel No. 011-26813887, 26814139 Fax No.011-26811833/26810591 email envirotech@vsnl.com...
- Page 2 CHAPTER I BACKGROUND Polycyclic Aromatic Hydrocarbons (PAHs) have been extensively studied in recent years due to their carcinogenic properties. Benzo (a) pyrene in particular has been studied extensively and is a proven carcinogen in this class of compounds. PAHs are ubiquitous in environment and are known to form due to anthropogenic and natural sources.
- Page 3 TECHNICAL SPECIFICATIONS OF APM 460 PUF Flow Rate 200 - 300 liters/min Particle Fractionater A cyclone device designed for flow range of 200- 250 liter/min for fractionating dust into two fractions. PM10 dust is accumulated on the filter paper (8’’ x 10’’ size) while coarse dust is collected in a cup placed under the cyclone.
- Page 4 PUF SAMPLER APM 460PUF Envirotech India’s leading manufacturer of air quality monitoring instruments has pioneered the development of an indigenous PUF sampler where gaseous fraction of PAH and PCBs present in the air are trapped in a PUF cartridge fitted just below 8’’ x 10’’ glass microfibre filter.
- Page 5 Figure 1 The figure above shows a schematic diagram of the APM 460PUF Sampler while the photograph shows the actual instrument.
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Page 6: Principle Of Operation
Cyclone assembly is so designed that it is easy to open for periodical cleaning purposes. FLOW MEASUREMENT IN THE APM 460 PUF SAMPLER The APM 460 PUF Sampler uses Envirotech‘s field proven Orifice Plate based Flow Metering System. The design has proven its reliability through trouble-free operation of few thousand field installations of Envirotech‘s popular APM 410/415 High Volume... -
Page 7: Main Parts And Controls
Manometer, in which the scale is calibrated in units of flow (m3/min). In the APM 460 PUF Sampler, the Manometer Assembly is placed in the upper portion of the front panel assembly so that it is convenient to read, and a reflecting tube support has been added to minimize parallax error. - Page 8 voltage. It has an inbuilt cut-off that will shut down the instrument at too high or too low mains voltage. CAUTION: Operating the instrument at too low (below 180V) and too high (above 250V) mains voltage by bypassing the voltage stabilizer is likely to damage the Blower Motor.
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Page 9: Installation And Preparation For Use
CHAPTER III INSTALLATION AND PREPARATION FOR USE The APM 460PUF Sampler is dispatched from the factory pretested and fully assembled. For safe transit the Air Inlet Pipe is dismantled and has to be reassembled before the sampler can be put to use. ATTACHING THE AIR INLET PIPE The Air Inlet Pipe is attached to the cyclone inlet by four socket head cap screws. - Page 10 Allow the water column to settle down and check that the lower level of the meniscus is at the zero mark of the scale. If necessary, add a few more drops of water and repeat for above step to remove air bubbles. ...
- Page 11 PREPARING THE FILTER The respirable dust concentration is determined by a gravimetric analysis, requiring an accurate estimation of the change in weight of the filter on account of the dust deposited on it. As such, handling of the filter paper must be minimized and care should be taken that the paper does not get sheared or damaged during handling.
- Page 12 PREPARATION AND INSTALLATION OF PUF CARTRIDGE cartridge thoroughly cleaned prior to use to remove any traces of PAH or PCBs from previous runs. For cleaning the PUF cartridge follow the procedure specified standard test methods such as EPA TO13 and after cleaning it should be placed inside the glass tube.
- Page 13 INSTALLING THE FILTER ON THE APM 460 PUF The filter paper is mounted on the backing screen at the top of the Filter Adaptor Assembly. The filter is clamped down by the top cover held in place by the four wing nuts.
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Page 14: Operation
CHAPTER IV OPERATION Check that the following preparatory steps have been completed before starting up the instrument: • A pre-weighed filter has been installed in the Filter holder. • A fresh / clean PUF cartridge has been loaded in the PUF Holder and the PUF holder has been placed at its location between the Filter Adaptor and Blower Assembly. - Page 15 glass PUF Carrier tube. Immediately cover the Glass tube with clean Aluminum foil and store in a safe container for transit to the lab for analysis. The procedure above describes the steps to be taken for a manually supervised operation of the instrument.
- Page 16 CHAPTER VI MAINTAINANCE The APM 460 PUF Sampler haa few moving parts that would require maintenance. The flow metering is performed by a completely static orifice plate assembly requiring no regular attention. However, for trouble free operation, the manometer assembly used to indicate the flow rate and the blower causing the suction must be periodically cleaned only distilled water should be used as manometer fluid.
- Page 17 MAINTENANCE OF THE MANOMETER ASSEMBLY : The manometer assembly uses distilled water as a manometer fluid. With time the water acquires residues and floating precipitate forms are seen which tends to clog the nozzles connecting the manometer tank to the manometer tube. To remove the precipitate and other deposits the manometer must be flushed out periodically (at least once in a month).
- Page 18 REPLACING A BROKEN MANOMETER TUBE Occasionally the Glass Manometer tube will get damaged in transit and must be replaced. To change the tube follow the steps given below. Open the four retaining screws to remove the front panel of the instrument. ...
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