Escaping gas can lead to serious injury. In event of failure, components can be ejected at elevated speed or
gas exhausted under high pressure. Open the connections only after the system has been depressurised.
Ensure that the pressure in the system as a whole cannot exceed the lowest maximum pressure of any of its
components. If variations of the pressure level or different pressure levels are to be expected in the system,
components must be used that can withstand the maximum expected pressure levels and peaks. Observe
the working conditions in accordance with BlueEye™ Ex-D datasheet. Actions or alterations to the gas quality
instrument, which are not described in these operating instructions, are not permitted. Ensure that the
mounting point has been made absolutely free from burrs and is clean. After installation, use a gas leak
detector sensitive to the used gas to ensure that there is no leak.
In addition, measurement data storage functionality is also provided through the interface of the Modbus
USB Windows Interface Package: for more details, please consult the GUI (graphical use interface) manual
to be found here: https://www.bright-sensors.com/blueeye-ex-d/
4. Maintenance & regular checks
The BlueEye™ Ex-D doesn`t have any moving parts, doesn`t combust the medium flowing through and
doesn`t chemically reacts with the medium. As a result, under normal operations, there are minimum
maintenance requirements. However, since the BlueEye™ Ex-D can`t control the medium quality flowing
through it, the recommend inspection interval is every 12 months. Please consult Bright Sensors or your
distributor for inspection interval based on the specific conditions of your application.
Regular checks are recommended to establish:
• Correct pressure and flow rate
• No contamination of the flame arrestors or sensor unit has occurred
• Accuracy of reported values is within required specifications
The BlueEye™ Ex-D is factory calibrated and a calibration report is provided with the device upon purchase.
The Calibration values are determined under the following conditions:
• Gas medium used: pure Methane (CH4) N45 (CH4 ≥ 99,995 %)
• A temperature between 20 °C and 30 °C of both the device and the pure Methane (CH4) N45
• Pressure: stable at 1050 mbar absolute
• 1 time boosting directly after starting to flow pure Methane (CH4) N45
• Minimum operating time before measurement: 20 mins
• Measurement time: 10 mins
To validate if the drift is within the required accuracy the BlueEye™ Ex-D should be tested as close as possible
under the same conditions when the calibration values were established. By comparing the calibrated values
with the validation values the possible drift can be quantified. Bright Sensors recommends recalibrating or
replacing the sensor unit if the average 10-minute values are deviating more than 0.25%. See for more
information Appendix C: Calibration Report example.
At normal use, routine inspection is advised to be performed on the BlueEye™ Ex-D on a yearly interval. Have
repairs performed by Bright Sensors or Bright Sensors appointed representatives only to prevent losing
warranty claim.
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