The testing device TEST is intended for monitoring of operating availability of the products ST 031, ST 031P and;
The use of TEST allows you to assess operating availability of the following modes of operation of the ST 031 unit:
- radio frequency detector-frequency meter;
- conductive wire lines’ analyzer (CLA);
- low frequency magnetic fields detector;
- infrared radiation detector.

The TEST includes a set of simulators integrated in one housing and provided with an independent power supply.
The following simulators are used for assessment of operating availability:
- simulator used with the radio frequency detector-frequency meter forms a miniature radio transmitter with quartz stabilization of frequency;
- simulator used with the conductive wire lines analyzer forms a signal generator with a preset output frequency;
- simulator used with the low frequency magnetic fields detector forms a source of stabilized magnetic field;

- simulator used with the infrared radiation detector, forms an IR-band transmitter with a preset value of the subcarrier frequency.
The TEST allows to carry out an assessment of the sensitivity of the tested channel, precision of associated measurements (frequency meter, synthesizer of the conductive wire lines analyzer), operating availability of the sensors, oscilloscope, spectrum analyzer, and display of the results of measurements.