SIAM DU-1, Руководство по эксплуатации

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Well sounders «DU-1»
of the device, the identification plate of the device is marked with an
"X" sign indicating special conditions of safe operation.

The "X" symbol in the explosion proof marking indicates
special conditions for safe operation:
1) Do not open the instrument cover and therefore the battery
compartment cover in hazardous areas;
2) Do not replace the battery and operate the computer in hazardous
areas;
3) Do not charge the battery in explosion hazard area;
4) Only the types of batteries specified in the manufacturer's
technical documentation may be used as power sources;
5) Constituents and circuits ensuring intrinsically safe design shall
not be repaired and in case of failure shall be replaced by new ones
supplied by the manufacturer;
6) The device's operability is maintained at ambient temperature
from minus 40 to plus 50
о
С.

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. Device enclosures are made with the
degree of protection against external influences not lower than IP54
according to GOST 14254-2015.
6.2. Measures to ensure and keep the device explosion-
proofness during the assembly, disassembly and repair of the
device.
6.2.1. Measures to ensure explosion-proofness before the
production process:
- The elements used in the protective component of “Fib” are
subjected to an acceptance test:
- resistors are tested for their nominal resistance;