FIELD: test equipment. SUBSTANCE: initial IR-radiation is focused and diaphragmed. Breakage in radiation is carried out till achieving filtration. Basic level of reference signal is set by heating filter. IR-radiation signals are transformed into electric signals. Device has focusing-diaphragming optical unit and breaker. Control input of the latter is connected to one output of electron transformer. IR-detector is disposed in thermostated case. EFFECT: improved reliability of checking. 2 cl, 7 cl, 4 dwg
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