Specifications include, but are not limited to: (A) Must have following constant flow and pressure range(s): a. Constant flow mode from 20-500 mL/min b. Compensation range from 20-500 mL/min up to 20 inches water back pressure c. Pressure range from 1 to 20 inches of water (B) Must have the following flow control system: a. Corrects for changes in back pressure, temperature, and atmospheric pressure i. Corrects flow for changes in temperature (32 to 113°F [0 to 45°C]) and ambient pressure up to 15,000 feet (4572 meters) above and down to 2300 feet (701 meters) below sea level (C) Flow modes must have the following accuracy: a. Constant flow control: ± 5% of set-point or ± 3 ml/min, whichever is better b. Atmospheric pressure: ± 0.3 in Hg c. Temperature: ± 1.0 C d. Real-time clock: ± 1% e. Constant pressure mode: Reading ± 0.5 inch water (D) Flow must feature flow fault with auto-restart: a. After 3 to 10 seconds of restricted flow, pump stops running, elapsed time stops, status LEDs flash red, and pump displays fault icon. After 20 seconds in fault, auto-restart is attempted up to 5 times unless full airflow is restored prior to that. If full airflow is not corrected during 5 restart attempts within 5 minutes, the pump ends the run and displays Sample Summary. (E) Display must include high-contrast backlit LCD/Time, date, battery status, flow rate, sample volume, temperature, atmospheric pressure, back pressure, programmed run remaining time, and elapsed run time
