tetraCal^® Calibrator for Air Samplers

tetraCal

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tetraCal
Complete in Fitted Case

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tetraCal Display Screens

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Sectional View of Measuring Section

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Typical Computer Screen Display -- deltaCal Software

Designed to go anyplace, indoors or out. From the top a 15,000 ft mountain to a 55° C desert or a -30° C snow field. Our first principle, Venturi calibrators will operate for 20 continuous hours on 4 AA cells. We are pulsation free, accurate to less than 0.75% of the flow rate reading, NIST traceable and designed, built and calibrated in an ISO 9001-2000 facility. We have always built our calibrators to these standards. Now our output screens show both Actual and Standard flow rates. This feature is applicable to every calibrator that we have ever produced and will be applied, during a recalibration, to every instrument at no charge.

The BGI tetraCal^® is the first and only volumetric continuous flow calibration/audit device which gives a direct indication of volumetric flow rate, standard flow rate, barometric pressure (both mm/Hg & mb), and ambient temperature in one instrument. It was developed for use with all types of air samplers in the 0.1 to 30 Lpm range. Typical screens are shown below on the left.

It is the only field audit/calibration device which meets the same temperature criteria as the EPA designated samplers themselves. The temperature range is -30° to 55° C (EPA requires up to 40° C).

The heart of the tetraCal^® is a venturi which is superior to an orifice in that it offers no sharp edges which can be damaged and a 90% recovery of the measurement pressure drop, important when calibrating some forms of speciation samplers or other critical orifice controlled devices. Because flow through the instrument is uninterupted, our graphic software provides a continuous output display of all functions.

The tetraCal^® was originally developed as the triCal^®, for Industrial Hygiene applications. Several years experience showed that the internally aspirated temperature sensor was too slow to respond to changes in overall ambient conditions. It has now been redeveloped as the tetraCal^® which houses the temperature thermistor in a normally aspirated Gill Screen. This is the same type of housing seen on all EPA PM_2.5 and Speciation Samplers. We find that it comes to equilibrium in 2-3 minutes.

Applications

• Calibration and audits of PM₁₀, PM_2.5, and speciation samplers to U.S. EPA requirements
• May be used on any sampler in the 0.1 to 30 Lpm range
• Usable in field or laboratory
• Suitable for calibration of cascade impactors
  

Features

• One switch (off/on) operation -- all data displayed on screen
• No moving parts
• 20 hour battery life (4-AA)
• Furnished with universal power supply (120/240 VAC)
• Download feature with supplied software
• Auto ranging
  

Downloads

• Download the latest version of the instruction manual. Click here and then click on manual # 8.
• Download software
• EPA PM_2.5 & Chemical Speciation Sampler SOP's using
  BGI tetraCal Calibrators (formerly triCal)

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Copyright © 2007 by BGI / Modified: Tuesday, April 22, 2008