Transcript Delta Cal PP

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

DeltaCal

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
AMBIENT TEMP. PROBE
AIR FLOW
DIFF. PRESSURE
SENSOR
VENTURI
MICRO PROCESSOR
TO FRM
SAMPLER
BAROMETRIC
PRESSURE
SENSOR
B.P. 760 mm Hg
Tfil:
23.0°
Tamb: 23.0°
Q 16.67 LPM
Batt%
90
FILTER TEMP.
PROBE
LCD DISPLAY SCREEN
Figure 4- Schematic Diagram of deltaCal
2168
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

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