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2.4.4 Modes of operation of the device:
- test mode;
- calibration mode;
- mode of detection of exceeding the set thresholds of gamma radiation and
concentrations of toxic substance vapors;
- mode of communication with PC.
In any operation mode the device controls over the battery voltage (see clause 3.2.5).
2.4.4.1 Test mode
The device enters this mode every time when it is turned ON or the batteries were
replaced. While in this mode the microprocessor controller provides for testing and diagnostics
of the main device modules. If all tests are passed successfully.
2.4.4.2 Calibration mode
The device enters this mode the batteries were replaced.
While in this mode, the device performs the calibration of the TSM channel (blow through
the ionization chamber, autocalibration of "zero" of the TSM channel). After calibration is
completed, the device automatically goes into the mode of detection of exceeding the preset
thresholds of gamma radiation and concentrations of toxic substance vapors.
2.4.4.3 Mode of detection of exceeding the preset thresholds of gamma radiation and
concentrations of toxic substance vapors.
While in this mode the device performs a continuous and independent control of the
radiation and chemical conditions.
While in this mode the device produces light and audible signals as follows:
- "Chemical alarm" (Red-LED is flashing) when the threshold value of the TSM is
exceeded;
- "Radiation alarm" (Yellow-LED is flashing) when the preset DER threshold is exceeded.
The light alarms are accompanied by audible alarms if these are enabled in the mode of
communication with PC.
The device provides for a possibility to record and store the history of operation (DER
values with set time intervals, alarms, i.e. exceeding of the set threshold value of DER and
concentration of TSM), and values of preset parameters in the non-volatile memory.
2.4.4.4 Mode of communication with PC
The device performs an exchange of information with PC using OS WINDOWS through
the infrared channel. An IR adapter and an exchange protocol compatible with the IrDA
interface are used.
While in the mode of communication with PC the following operations may be performed:
- the device can be registered to a specific user;
- to store a time when the device was received and returned by user;
- to read information from the device memory;
- to change the following device parameters:
the set DER threshold;
to disable audio alarms;
the time interval to store the history of operation;
- to store and transmit to PC the history of the measurement of the photon radiation DER,
records about exceeding the preset thresholds of gamma radiation and concentrations of toxic
substance vapors.
Summary of Contents for PM2010
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