PORTABLE ENGINE TEST SETS & TRIMMERS The H301 Series Environmental Control System (ECS) Tester measures and displays parameters required to test and troubleshoot aircraft heating and air conditioning systems. These parameters include temperatures, pressures, resistances, AC and DC voltages, and DC currents. Housed in a wheeled accessory case that holds cables, pressure hoses, adapters and a temperature probe, the tester comes complete with all required instrumentation to maximize mission readiness. Temperature System Typically, the ECS Tester measures temperatures of the cockpit air supply, the avionics cooling air, the manifold and ambient air. a precise, internally-generated temperature signal is also available to verify proper operation of the H301 temperature measuring circuitry. Pressure System The pressure measuring system includes four different pressure transducers that measure from 0 to 20 inches of H20 and from 0 to 15, 0 to 60, and 0 to 300 psig. A single pressure can be connected to the 15 inch H20 transducer, while four pressures, selectable by deck-mounted valves, can be connected to each of the other three psig transducers. Multimeter The ECS Tester also includes an automatic ranging multimeter that permits the operator to measure voltages, currents and resistances to aid in troubleshooting valves, controllers and sensors in the environmental control system. .^8945 South Freeway Fort Worth, Texas 76140 www.howellinst.com 817-336-7411 Fax: 817-336-7874 [email protected]

Specifications Temperature Display and Deck Lighting The ECS Tester uses a 0.4-inch high, seven segment, LED display. a display test button and display brightness control are also provided, and a light located in the lid of the ECS Tester provides deck lighting during nighttime operation. Howell Instruments, Inc. • 8945 South Freeway • Fort Worth, Texas 76140 www.howellinst.com • 817-336-7411 • Fax: 817-336-7874 • [email protected]