2.6 Pollution and Abrasion
Make sure there is no pollution inside the sensor in- and outlet before connecting the instrument. Do NOT use
any lubricant or sealant. Abrasion can damage or even destroy the sensor.
2.7 Mechanical Stress, Liquids and Dirt
Do NOT insert any item into the openings. mechanical stress, liquids and dirt may damage or destroy the
sensor. Warranty excludes failures and damage caused by the customer, such as contamination, improper
electrical hook-up, dropping etc.
2.8 Maximum Torque
To avoid mechanical damage, DO NOT drive more than 13 Nm torque on 1/4” NPT gas connectors and 2 Nm
on earth connector. When removing connected gas lines from the 1/4” NPT gas connectors ensure the gas
connectors are not turning by using a 27mm wrench.
Turning 1/4” NPT gas connectors can lead to damaging of the sensor cell within the BlueEye™ Ex-D and will
lead to loss of warranty.
2.9 Electrical connection
The cable of the BlueEye™ Ex-D has 9 wires, with the following numbers printed on each individual wire, except
for the Yellow/Green wire. The numbers correspond to the following connections:
Wires 1 and 2 connect the 24 VDC (+/- 10%) power supply.
Wires 3 and 4 connect the 4-20 mA current loop
Wires 5, 6, 7 and 8 connect the RS-485 Modbus RTU.
Wire 9 is the ground of the BlueEye™ Ex-D.
Special care must be taken with the connection of the outer end of the electrical cable of the BlueEye™ Ex-
D. In case the outer end of the cable is installed within the ATEX zone, an ATEX approved junction box has to
be connected to the outer end of the cable.
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