POWER SUPPLY MONITOR AND CONTROL FOR MEDICAL INSTRUMENT

摘要

An instrument (100) for measuring a clotting characteristic of blood, a blood fraction or a control (514) comprises a controller (284) for orderly de-energizing the instrument ( 100), a power source (122, 334.) for the instrument (100), and a capacitor (1000 .mu.F, 25 V for storing sufficient energy to permit the controller (284) to orderly de-energize the instrument (100). A regulator (360) monitors the voltage supplied to the instrument (100) by the power source (122, 334) and signals (ERROR to P3.2) the controller (284) to orderly de-energize the instrument (100) if the monitored voltage does not exceed a threshold. The controller (284) is coupled to the capacitor to permit the controller (284) to orderly de-energize the instrument (100). The power source (122, 334) and controller (284) are coupled to the regulator (360).