What's the Pressure Drop Across Your Carbon Canister?

The APS CPDS-1000 test stand is designed for manual control of pressure and flow for testing carbon canister pressure drop values. This system tests load and purge modes by utilizing a compressed air supply and a vacuum pump. Test functions of the CPDS are:

• Load or fill mode simulation by applying pressure to the canister load or tank port.
• Purge mode simulation by applying vacuum to the purge port.
• Canister weight determination on the optional scale.

The CPDS can be used for the following tests:

• Purge Vacuum Drop
  -    Measures the total allowable purge vacuum drop across the carbon canister.

• Loading Pressure Drop
  -     Diurnal (Enhanced Evaporative) - measures the total pressure drop across the carbon canister.
  -     Refueling (ORVR) - measures the total allowable air and tank tube pressure drop across the carbon canister.

• Purge Restriction
  -      Measures the total allowable purge vacuum restriction across the carbon canister for enhanced evaporative and ORVR.

Optional features:

• Fully automatic control and data acquisition system
• Full integration with APS C2K (Canister Conditioning System)
• Fixed-in-place or portable units

 
Technical Specifications

System power requirements

• Voltage: 120VAC 60Hz, Single Phase
• Current: 5 AMPS

Capabilities

• Maximum purge flow rate: 100 slm
• Maximum fill flow rate: 100 slm
• Maximum vacuum reading: -25 in. wc
• Maximum pressure reading: +25 in. wc
• Scale capacity: 7.2 kg with 0.1 g resolution

Accuracy

• Mass flow meter: +/- 1% of full scale
• Differential pressure transmitters: +/- 0.25% of full scale

Purge vacuum pump

• Rating: 4 cfm at -14 in. Hg

Compressed air

• Maximum pressure: 120 psig
• Minimum pressure: 90 psig at 5 scfm

Operating Temperature

• Maximum ambient temperature: 105°F

Plumbing connections

• Compressed air: 1/2" OD
• Exhaust vent: 1" PVC

Canister connections

• Pressure load port and pressure transducers: 1/4" OD, stainless steel
• Vacuum purge port: 3/8" OD, stainless steel
• Mass flow meter ports - 1/2" OD, stainless steel