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5: Common ground (signal returns) <br /> 6: 0 to 5 V analog output(positive) <br /> The digital communications cable provided as a standard accessory is to be inserted <br /> into this receptacle for interconnection to a computer (for data downloading or to <br /> reprogram parameters). The analog output cable is provided with flying leads for <br /> interconnection with other data processing and/or control systems. <br /> WARNING:The modular jack receptacle on the side of the personalDataRAM <br /> should be used only for communications with computers and <br /> alarm circuitry. Do not,under any circumstance,connect any <br /> communications equipment(e.g.,telephone) to this receptacle. <br /> 5.4 Back Panel and Belt Clip <br /> The back panel consists of a label with important user information on safety <br /> procedures and certifications, model and serial numbers, etc. <br /> The back panel is provided with mounting hardware for the attachment of the belt <br /> clip kit(see Figures 5 or 6 for mounting configuration of the belt clip). <br /> 5.5 Sensing Chamber <br /> Referring to Figure 1 or 2, the upper mid-section of the personalDataRAM contains <br /> the optical sensing chamber.This chamber is the only internal section that the user <br /> should access for maintenance purposes (see Section 12.2). <br /> On the model pDR-1000AN, air enters the sensing chamber through the two slot <br /> shaped inlets (one on the front and other on the back) under the protective bumper. <br /> During instrument operation those two openings should remain unobstructed in <br /> order to ensure free access of the surrounding air.When the model pDR-1000AN is <br /> used as personal monitor,i.e.,clipped to a person's belt,the rear air inlet opening <br /> may be partially obstructed,but care should be exercised in ensuring that the front <br /> air inlet remains free of any obstructions. <br /> On the model pDR-1200, air enters the sensing chamber through the opening in the <br /> cyclone receptacle cup (black cup on right side of sensing chamber),passes through <br /> the photometric stage,and exits through the opening in the filter holder receptacle <br /> cup (black cup on left side of sensing chamber), after which the air passes through <br /> the filter. <br /> 6.0 PREPARATION FOR OPERATION <br /> 6.1 Battery Installation <br /> When shipped from the factory, the personalDataRAM will arrive without its <br /> replaceable 9V battery installed. Two fresh alkaline batteries are factory packed <br /> 11 <br />