MULTIGASSENS-М2 USER MANUAL
Rev. 1.8 07.02.19
13
electric circuit “ia”.
The level of intrinsically safe circuit “ia” is provided:
-Fulfilment of the requirements for electrical insulation strength;
-Meeting the requirements for leakage paths and electrical gaps.
Implementation of device’s explosion-proof type of explosion protection "intrinsically safe
electrical circuit ia" with the following characteristics:
diameter of the connecting wires of electrical circuits of the device is not less than 0.1 mm,
the width of the printed conductors of the electronic circuit boards no less than 0.3 mm.
secure the value of inductance of circuit elements: L
40 mH;
dielectric strength between the intrinsically safe circuit and the chassis at least 500 V;
creepage distances and electrical clearances between the intrinsically safe circuit and the
enclosure is not less than 2 mm;
heating elements and compounds below 135
С;
friction intrinsic safety of devices is ensured by the absence of light alloy parts in the shells of
the device;
electrostatic intrinsic safety of the device MULTIGASSENS-М2 is provided by limiting the
surface area of the non-metallic shell of the device with a resistance above 10
9
, the surface area of the
display is 1598 мм
2
, framed by a shell with less electrical resistance to the surface 10
9
Ohm;
the degree of protection of the device from external influence is ГОСТ 14254 - IP 67;
spark protection elements are loaded no more than 2/3 of the permissible voltage and power;
The device is powered by a rechargeable battery with the following parameters U
0
:
3,9V; I
0
:
0,425 А;
• trackingstyle electrical insulating materials no less than 100 V.
