AJAH.418266.007RE
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1.4.5 The measurement result is compared with preset thresholds each second; the following
thresholds are limiting the tunnel of allowable AEDR of neutron radiation:
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“Alarm threshold” – this threshold defines the upper limit of the tunnel;
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“Preliminary threshold” – this threshold sets the warning level;
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“Bottom threshold” – the bottom of the tunnel, signal falling below the bottom line is
usually evidence about the detector failure or decreasing of the controlled process intensity below
allowable limit.
In case when zero value of the threshold is set – it is inactive.
1.4.6 Detectors provide possibility for data transfer and access to the processed information via
communication channels based on interfaces (DiBUS protocol):
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RS-422 (DiBUS data exchange protocol) …………....….….……...….. for BDMN-200DD;
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RS-485 (DiBUS data exchange protocol) …………....….…..……..….. for BDMN-200PD.
For the description of data exchange registers in the DiBUS protocol see Appendix A. Detailed
description of the DiBUS protocol is available on the website of the manufacturer www.doza.ru.
1.4.7 Detectors require external stabilized power supply. Wiring diagram is presented in the
Appendix B.
1.4.8 The inner electronic circuit is galvanically isolated from the detector casing.
1.5 Marking and sealing
1.5.1 Detector casings have a nameplate with the following information:
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trademark and name of the manufacturer (supplier);
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reference designation of the detector;
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works number of detector according to the manufacturer's system of numeration;
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degree of ingress protection against solid items and water provided by casings;
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made in Russia.
1.5.2 Method of marking and place on the detector where it is made shall comply with the
design documentation.
1.5.3 Detectors are sealed in accordance with the design documentation.
1.6 Packing
1.6.1 The detector’s package complies with the design documentation and provides protection
against ingress of atmospheric precipitations and aerosols, splashes of water, dust, sand, solar ultra-
violet radiation and limits the ingress of water vapour and gases.
2 INTENDED USE
2.1 Operational limitations
2.1.1 Detectors retain operability under conditions stated in sect. 1.2.
2.1.2 Detectors can be used with installations equipped with corresponding data exchange
interface and providing power supply with required voltage for detectors.
2.2 Preparation of the product for use
2.2.1 Connect the detector to PC following the wiring diagram (Appendix B) and using, if
necessary, interface converter PI-02 as shown in figures 2.1.
