The 5900 Signal Conditioner frame is of modular design to facilitate production of a family of products. This frame is designed for both the Gould 4600 and 5600 line of signal conditioners. The signal conditioners are retained and removed by an ejector from the front panel. The 5900 frame provides signal conditioner outputs via individual BNC connectors or Bare Wire connectors (Medical Output board). It is also supplied with an additional BNC connector for a sync clock input which will be available in the future. From the Medical Output board, it makes available all the medical and auxiliary analog output signals from each individual signal conditioner. This frame has been designed to "nest" on top of Gould's 3600, 3800, ES2000 or TA2000 chart recorders or the Gould 5300 waveform recorder. It is offered in a portable or rack mounted version. The 5900 has a proprietary board, Recorder interface board, which can be connected to any Gould TA2000 or 3000 series recorder (via the 5900/TA2000 or 5900/3000 cables respectively). The 5900/TA2000 cable (CL-711297) is a 40 in. cable. The 5900/3000 cable comes in 2 lengths: 3 ft. (CL-311222-1) or 6 ft. (CL-311222-2). The Recorder interface board passes all the signal conditioner’s recorder output signals over to the recorder. With the Interpreter Board option and the appropriate signal conditioner(s) (5600 with status board option), signal conditioner status information can to be printed on the Gould 3000 recorder’s chart interchannelly (recorder must have interchannel writing heads). The 5900 has been designed to meet and tested to international safety and EMI/RFI standards. These standards include applicable UL, CSA, IEC, FCC level A, and VDE level A. Specific applicable standards and associated certifications will depend on total system configuration as shipped from the factory. The present instruction manual contains some information and warnings that have to be followed to ensure safe operation and to retain the apparatus in safe condition.