MODEL KS-306.50-W & WI

 MICROPROCESSOR CONTROLLED, CONTINUOUS OPERATION, LOW VOLUME FLOW RATE DUST, AEROSOL, SOLID PARTICLE SAMPLER WITH PM10 - PM2.5 - PM1 PRESEPARATOR

DRIP WATER PROTECTED, PORTABLE DESIGN

ISO 12884 AND EN 12341 STANDARD

KS-306.50-WI

1. Purpose

The type KS-306.50-W & WI sampler instrument is suitable for continuous, 24-hour or longer-duration, one- or three-stage, fractionated sampling of airborne solid particles, aerosols to be found in the air / Figure 1./.

Together with a chamber-system, circular gap nozzle type, two-stage dual impactor integrated with the sampler, the instrument facilitates filtering out of approx. 70-100 [m3] airborne dust and solid particles from the air, daily.

Depending on the dust concentration - after 24 - 96 hours of sampling - with decomposition to three fractions - having an adequate analytical background - the heavy metals bound to the dust and other toxic materials causing the genetic mutations and, other materials emitted to dwelling areas by the industrial technologies can be detected.

The sampler is provided with cascade impactors of PM10 - 10 [µm] , PM2.5 - 2,5 [µm] and PM1 - 1 [µm] cut-off size, pre-separator and back-up filter.

The intake device and the volume flow rate meter form a compact unit. To increase the measuring accuracy a temperature-measuring probe has been built-in.

The control electronics stores all measurement data and it can be interconnected with PC through RS -232 port.

The measurement data can be displayed in file or, using the AR-COM communication software, printed.

The measurement method complies with the specifications of the ISO 12884 and the EN 12341 standards, too.

The type KS-306.50-W & WI sampler is a portable instrument, protected against drip water.

2. Technical description

The so-called low volume flow rate sampler shown in Figure 1. consists of the following main sub-units:

  • Suction device integrated with the volume flow meter.

  • 3x2-double stage cascade impactor and filter housing with connection extension.

  • Measuring and control unit with thermometer and pressure signal forwarding cables and electric fittings, with covering providing protection against drip water.

From the air flowing from the outer atmosphere through the sampler intake device /1/, Figure 1., designed according to the EPA recommendations, provided with guide columns reducing the influence of the wind intensity and wind direction variations, and a volume flow rate reducing space, via a short straight tube section and a Venturi volume flow rate meter /2/, the dust particles of bigger size are separating on the trapping plates of the impactor stages /3/.

The smaller particles are intercepted by a planar filter of 60 [mm] diameter accommodated in the filter housing /4/. The high-purity air is passed through the blow-out opening of the vacuum pump to the outer atmosphere. The evaluation unit /5/ of the volume flow rate meter, processing the electric signal proportional to the temperature of the intake air and the pressure signal /6/ of the Venturi meter, measures the quantity of the through-suctioned air [m3/h], the total volume through-suctioned during the sampling, in [m3] and, the duration of the sampling.

Setting of the slow flow rate change originating from clogging of the filter - to the requested value - is effected automatically by the electronic rotational speed controller. Protection of the measuring and control unit against unauthorised intervention and drip water is ensured by a corrosion-proof, lightweight structure.

SPECIAL FEATURES

  • Volume flow rate meter tested and calibrated by the National Office of Measures.

  • Wide sampling measurement range.

  • High-accuracy, long-life volume flow rate meter, practically insensitive to pollution.

  • Sampling volume flow rate stabilisation, continuous regulation to the set values.

  • Sampling for Æ 50 or 47 [mm] filter, 3x2- double stage PM10, PM2.5 and PM1 impactor.

  • Microprocessor control, PC connection facility for data polling.

  • Protection against intervention. Data protection and storing, restarting in case of power failures.

  • Full-range LCD display for checking of the summated volume and volume flow rate.

  • Portable, lightweight design and easy handling.

  • Operation from 230 [V] mains or battery as well.


    • 3. Technical data
  • Optimum flow rate with impactor
    		• qN = 2,3 [m3/h]
  • Main functions to be fulfilled
    		• Measurement of particulate matter in ambient air
  • Field of application
    		• 24-hour measurement of PM10, PM2.5, PM1 concentrations in ambient air
  • Main functional requirements
    		• Principle of method: gravimetric
  • Unattended continuous sampling
    		• for 1 week
  • Sampling head
    		• PM10, PM2.5, PM1 cascade impactor
  • Sampler head, impactor material quality
    		• Stainless steel, Al.Mg.Si.h3, titanium
  • Sampling method
    		• Semi-automatic
  • Operating time
    		• Continuous
  • Sampling channel
    		• Automatic or manual
  • Channel change
    		• 1-24 hours, programmable
  • Material quality of the sampler
    		• Corrosion-proof, where necessary
  • Usage of the sampler
    		• Easy access to operating parts
  • Handling and operation
    		• Simple and fast with special regard to changing sample in the field
  • Data display
    		• Alphanumeric LCD display for the major parameters
  • Flow rate measuring range
    		• q = 1 - 4 [m3/h]
  • Flow rate stability
    		• ± 0,5 [%]
  • Power supply
    		• 230 [V], 50 [Hz] , min. 30 h. from battery supply
  • Display of sampling data, by channel
    		• [m3/h] , [m3] , [°C] , [bar]
  • Data storing in case of power failure
    		• Min. 120 hours
  • Data storing and printing
    		• AR-COM software, RS-232
  • Power consumption, max.
    		• 250 [VA]
  • Mass of sampler
    		• 14 [kg]
  • Motor speed control
    		• Electronic
  • Control to the set volume flow rate value
    		• Automatic
  • Floor area demand
    		• Approx. 460 x380 [mm]

    Figure 1.

    Figure 2.