The Evaporative Emissions Test System, Variable Volume/Variable Temperature (VV/VTS) Sealed Housing for Evaporative Determiniation (SHED), is designed for use in measuring automotive diurnal evaporative hydrocarbon (HC) emissions from non-operating test vehicles.
Evaporative Emissions Test System, VV/VT SHED is designed and constructed to confirm to the latest standards regulations and executes the test methods and procedures:
- U.S. EPA Evaporative Emission Regulation, 40 CFR Part 86, subpart B, 1993 & 1990 versions.
- California Air Resources Board’s (CARB’s) Evaporative Emission Regulations for light passenger cars, revised 20 1991 and 1996.
- Euro III, IV, V & VI, EEC 98/69, parts relevant to Diurnal Evaporative Emissions and Hot Soak Test.
- GB/T 18352.1, 1835.2
- Fully welded stainless steel construction to meet LEV testing
- Multiple vehicle door configurations available
- Inflatable seal system for sealing main vehicle door
- Zero leakage butterfly valve for purge air
- Volume compensation using impermeable bags
- Temperature compensated flow meter for volume determination
- Bottom discharge air handler for uniform underbody airflow
- Standard regulation and user defined temperature profiles
- Interface with all major HFID analyzers
- PLC or PC based control systems available
- Cascade PID control for enclosure temperature vs time profile runs
- Multiple PID set for optimum temperature control throughout the temperature profile
- Monitoring of system safeties
- Audible and visual annunciation of alarms
- Manual over-ride for all critical functions