Datascope Accutorr Plus Service Manual
Also see for Accutorr Plus: Service manualService manual
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CPU/NIBP Module Assembly with LCD Display Theory of Operation1 - 6 0070-10-0691 Accutorr Plus Service Manual1.2.3.9 Pulse Acquisition RequirementsPulse amplitudes from 0.06 mmHg to 12 mmHg are recognized. Pulse rates can rangefrom 30 bpm to 250 bpm. The software discriminates pulses from the digitized pulsechannel signal, and characterizes the pulses for amplitude, DC pressure, and pulse period.False triggering, due to the dicrotic notch or noise, is minimized.1.2.3.10 Artifact Rejection RequirementsThe software provides means of artifact rejection, both during acquisition and duringsubsequent processing of the pulse array. Means of rejecting artifacts include attention tothe timing and amplitude of pulses relative to adjacent pulses. If motion artifact is detectedduring acquisition, the software may cause temporary suspension of the bleed downprocess until a quiescent patient condition returns.1.2.3.11 Parameter determination RequirementsPulses that are deemed acceptable after artifact processing are entered in the pulse array.Heart rate is taken to be the average rate of the pulse array data. Pulse periods differingexcessively from the median are ignored. Pulses that do not appear to fit the amplitudeenvelope are removed. The systolic, diastolic, and mean pressures are then calculated inaccordance with standard algorithms. A fair amount of data manipulation and computationis required in the parameter determination. The results are reported no more than onesecond from the termination of the pulse acquisition phase.1.2.4 Major Hardware Components1.2.4.1 CPUA microcontroller (min. 16MHz) with three (3) serial communication controllers (SCC), aserial communication port (SCP), programmable chip select lines (to minimize gluelogic), a IDMA controller, and parallel I/O ports for discrete signals.1.2.4.2 Flash Memory512K x 16 Flash ROM used for program storage and execution. A Flash ROM is used alsofor downloading new revisions of software via the CPU's serial I/O lines (SCC).1.2.4.3 Battery Backed Up Static RAM512K x 16 static ram is used for data storage, trend information, etc. This memory is usedfor data storage. Therefore, a battery back up is provided.1.2.4.4 Nonvolatile RAMNonvolatile ram is used for configuration and serial number information. This memoryrequires a battery back up.To Purchase, Visit Avobus.com or call 1-800-674-3655 |
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