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of the device. The design of the protective component “Fib” is met with the
requirements of GOST 31610.11-2014 (IEC 60079-11:2011), including
leakages and clearances. Thus, the electrical circuit coming out of the
battery compartment of the device is intrinsically safe.
• The electrical circuit principal and applied third party
components provide maximum power consumption not more than 0.45 W
from the internal battery with maximum possible voltage on it 4.5 V. The
total maximum capacity of the electrical circuit is 380 μF, maximum
inductance is not more than 20 µGn. The maximum current in the circuit
during normal operation is not more than 100 m.
• The echometer uses EEMB LP103450LC-PCM-LD battery cell,
prism size, with a total voltage of 3.7 V and a capacity of at least 1.85 Ah.
The battery has special made contacts which exclude the possibility of its
incorrect switching on (polarity reversal) and is located in the internal
battery compartment of the device. The design of the battery compartment
ensures that the battery does not fall out of the device. Do not replace the
battery and do not charge it in the hazardous area. For this reason, in order
to inform the user about special conditions of use of the device, the
identification plate of the device is marked with an "X" sign indicating
special conditions of safe operation.
• The maximum temperature of overheating of components and
connections in the circuit diagram during normal operation is 15 °C max.
Thus, the surface temperature of conductors and elements during operation
and at maximum operating temperature plus 50 ° C is not more than 65 °
C.
• There are no plastics in the shells of the device that can accumulate
electrostatic charges. Device enclosures are made with the degree of
protection against external influences not lower than IP54 according to
GOST 14254-2015.
• The minimum width of conductors on the PCB is 0.2 mm, copper
thickness is not less than 18 µm.
5.3.7 Measures to ensure and keep the device explosion-proofness
during the assembly, disassembly and repair of the device.
5.3.7.1. Measures to ensure explosion-proofness before the
production process:
Summary of Contents for SUDOS-mini 2
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