FIELD: technical diagnosis; check of degree of choking of heat-exchangers in water-cooled instrument cabinet. SUBSTANCE: method of check is based on determination of rate of flow of liquid through heat exchanger with the following additional procedures: determination of relationship $$$ of liquid rate flowing through clean heat exchanger at heating it by means of standard heater during preset length of time $$$; determination of change in temperature at the same point on the heat exchanger being checked at heating it by means of standard heater within length of time $$$ at nominal rate of flow of liquid fed to instrument cabinet; determination f actual rate of flow of liquid through heat exchanger being checked by relationship $$$. To simplify the method, determination of relationship $$$ is effected on lower heat exchanger of instrument cabinet; liquid to this heat exchanger is fed under pressure to prevent it from entering higher heat exchanger. EFFECT: simplification of method; enhanced reliability. 3 cl, 2 dwg
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