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j. The electronic gauge display shall be both digital and analog display, and back lighted with the touch of a button. k. The SCBA shall have a low battery display easily read by the user when in operation. 1. Actual real time breathing consumption rate shall be used to determine time to low pressure alarm. m. Low pressure alarm shall be anon-aspirating whistle at the reducer and electronic chirp from the gauge (see point q). n. The secondary low-pressure alarm shall be an approved part of the SCBA and meet the requirements of the current editions of NFPA-1981 and 42 C1+R, Part 84. o. The unit shall have an electronic low pressure alarm in the form of an electronic chirp or tone, which is distinct from all other alarms. p. Two rear enunciators, to meet NFPA-1981 2007 edition PASS warning requirements shall be integrated into the back plate. q. The rear enunciators shall be on the left and right hand side of the back plate when the cylinder is in position. ` r. A user ID shall be programmable into the unit. s. All data from the electronic unit shall be down-loadable through an lR port to a computer. 5. Back Plate, Harness Assembly and Integrated Electronic System a. The back plate shall be atwo-piece, anti-static carbon fiber composite construction with orthopedic design so as to evenly distribute the weight of the SCBA over the user's lumbar region, hips and shoulders. b. The back plate shall have a three position multi-height adjustment so as to customize the unit to the wearer torso. c. The back plate waist belt shall be designed to move in a vertical up and down movement to provide maximum movement when bending forward and stretching. d. The waist pad shall swivel from side to side by approximately 30 degrees to increase comfort and stability when moving. e. Central battery supply and electronic modules shall be housed in the "back" of the back plate £ The battery supply shall utilize alkaline batteries or lithium Ion rechargeable batteries to provide a minimum of 12 months battery life. g. The back plate shall have two (2) handles one on either side of the back plate so to allow carrying the SCBA or for ease of donning or to assist in dragging a fire fighter in the event of a rescue. Each handle must be able to withstand 450 pounds of force. h. The SCBA shall accommodate a 30, 45 and 60 minute 4500 psi full composite, carbon fiber cylinder. i. The back plate shall extend below the cylinder valve to afford additional protection to valve and regulator, and also to protect the wearer's tailbone in the event the user falls backward. j. The internal padding of both shoulder and waist pads shall be of a closed cell construction to eliminate water absorption and provide maximum comfort. k. The external padding cover shall be high abrasion resistant, high puncture resistant, non slip, impregnated waterproof rubber (chlorophrene) coated, quick drying, chemical resistant and inherently fire retardant material. 1. The harness webbing shall be constructed of a heavy duty, high temperature Kevlara/Ublend/aramid type material. 7