FIELD: measuring equipment.
SUBSTANCE: invention can be used to verify operation of an alarm signal sensor, in particular its resistor. Essence: measurement circuit (18) for electronic signaling circuit (4) comprises measurement resistors (30, 31), configured to be connected to signaling circuit (4), data acquisition circuits (42) comprising voltage measurement means (50) connected to contacts of measurement resistors (30, 31). Change circuit also includes test resistors (40, 41, 70, 71) and controlled switches (36, 37, 74) connected to measurement resistors (30, 31). Ratio of resistance value of test resistors (40, 41, 70, 71) to resistance value of measurement resistors (30, 31) exceeds 10. Data acquisition circuit (42) comprises means (60) for comparing voltages measured at contacts of measurement resistor (30, 31) in two states of switch (36, 37, 74), and means (66) for qualitative evaluation of measurement circuit (18) depending on comparison result.
EFFECT: possibility to use signaling circuit irrespective of tests performed by measurement circuit.
11 cl, 3 dwg
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