Continuous Particulate Training Workshop NIST Traceable Volumetric Flow Rate, Temperature and Pressure Calibration/Audit Devices for FRM and Continuous Ambient Monitors TAMS Continuous Particulate Training Workshop October 21 - 24, 2003 BGI Instruments

Introduction Federal, State and Tribal AQ Agencies Require Flow Calibration and Audits on all Gravimetric Particulate Samplers and Continuous Monitors Commercial Vendor Claim “Primary Flow” and “NIST Traceability” are Confusing A NIST Traceable Volumetric Flow Rate, Ambient Temperature and Pressure Field Calibration/Audit Device Has Been Developed and Tested

Investigation NIST Primary Standard vs. Flow Transfer Standard Requirements for a Field Calibrator Current Methods Available DeltaCal & TriCal NIST Traceable Calibrators Meet Requirements

NIST Primary & EPA Flow Transfer Standards NIST “PrimaryStandard” Flow Calibration Facility Colorado Engineering Experiment Station (CEESI) Titanium Vessels used for Gravimetric Analysis as the NIST Primary Standard Pressurized, Evacuated and Weighed for Primary Volume. NIST “Transfer Standard” Flow Device Traceable to NIST (CEESI) Primary

CEESI - NIST Primary Calibration Lab

Priorities of a Field Calibrator NIST Transfer Standard, Accuracy to <2%to Primary Calibrator must be Field Usable to EPA FRM Specs Insensitive to Atmospheric Conditions Calibrator should not add artificial pressure to sampler to interfere with electronic flow controller Portable & Battery Powered Direct Reading of Flow Rate, Ambient Temperature, & Barometric Pressure RS232 Calibration Report-Digital Calibration Report

“Flow Transfer Standard” Calibrators Bubble Meter Gilibrator™ (Wet) - (Excellent for Indoor Use) Frictionless Piston - (Not Field Hardened, Dirty Piston) Bios/DryCal/DC-Lite™ (Dry)- 3% low bias Orifice- Quartz Tube - (Sensitive to Wind) Streamline/Chinook™ (Dry) – adds system pressure, double of a Venturi Venturi- - (Field Hardened with Gust Cap) BGI DeltaCal (Dry) – flow, temperature & pressure

DeltaCal Calibration Kit Measurements: Barometric Pressure Ambient Temperature Filter Temperature Volumetric Flow Rate Digital Output for Recording Field Data Software to Print Summary report

Schematic Diagram of DeltaCal

DeltaCal NIST Traceable Specifications Operable Range –30 to 40°C 2 to 20 aLPM Model DC 1 10 to 60 aLPM Model DC 100 +/- 1% of NIST Temp Sensor Range – 40 to 50°C < +/- 0.5°C Difference to NIST Pressure Range 400-800mmHg < +/- 2mmHg of NIST

Calibrator Software Screen Display Historical Record User Configurable All Readings in one Display Auto Resolution ASCII File Export Flow Statistics

Summary Printed Report

TriCal Calibrator Venturi #1 0.1 - 1.2Lpm Operable Range -30 to 40°C Flow Range 0.1 to 30.0Lpm Venturi #1 0.1 - 1.2Lpm Venturi #2 1.2 -6.0Lpm Venturi #3 6.0 - 30Lpm Barometric Pressure Ambient Temperature (Option) Filter Temperature

Calibrating a Continuous PM Monitor CPM Display

BGI - NIST Certified Flow Calibration Laboratory < Insert photo of BGI Test Bench >

Conclusions BGI DeltaCal & TriCal are Flow Transfer Standards Directly Traceable to NIST Primary Field Hardened Device with Low Pressure Drop and DeltaCal Includes Wind Gust Cap Cost Includes 4 Measurements, Rather than just One $1695. Affordable Re-Calibration by a Single Vendor $150. US EPA Tested – Exclusive PEP PM2.5 Network & PM-Coarse Method Development Program $120 per year