BRIGHT BlueEye Ex-D User Manual

Bright Sensors SA All Right Reserved © 2021
6
The BlueEye™ Ex-D correlates these measurements to the following parameters of a gas composition:
• Gross Calorific Value – H
s
(ISO 6976:2016 / GPA 2172:2009)
• Net Calorific Value – H
i
(ISO 6976:2016 / GPA 2172:2009)
• Gross Wobbe Index – WI
s
(ISO 6976:2016 / GPA 2172:2009)
• Net Wobbe Index – WI
i
(ISO 6976:2016 / GPA 2172:2009)
• Density – ρ (ISO 6976:2016 / GPA 2172:2009)
• Relative Density – ρ rel. (ISO 6976:2016 / GPA 2172:2009)
• Compression factor – Z (ISO 6976:2016 / GPA 2172:2009)
• Air-Fuel ratio – AFR (calculated based on 20.946% oxygen in air)
• Stoichiometric Air-Fuel Ratio – s-ARF (calculated based on 20.946% oxygen in air)
• Methane Number – MN (ISO23306 PKI Methane Number)
• Carbon dioxide mol% – CO
2
mol% (based on IR CO
2
sensor)
• Hydrogen mol% – H
2
mol% (based on Bright Sensors correlative model)
The by the device deployed correlative models are temperature and pressure compensated within a
defined range. To ensure measurement results within specifications, the following boundary conditions MUST
be ensured for each BlueEye™ Ex-D model individually:
BlueEye™ Ex-D Specifications
Reported values
Units
Reference conditions
Applied correlation and
calculation standards
Gross Calorific Value (H
s
)
MJ/m³, kWh/m³
BTU/scf,
Therm/scf
0/0°C, 15/0°C, 15/15°C,
20/20°C, 25/20°C at
101325 Pa and 60°F
at 14.65, 14.696, 14.73 psi
and 15.025 psi absolute
NIST AGA-8
ISO 6976:2016
GPA 2172:2009
Net Calorific Value (H
i
Gross Wobbe Index (WI
s
)
Net Wobbe Index (WI
i
)
Density ρ
kg/m³, lbm/scf
Air Fuel Ratio λ
-
Volume, 20.946% O
2
Simplified method
Methane Number
-
-
ISO23306 PKI Methane Number
CO
2
& H
2
concentration
1 2
mol%
-
Proprietary methods
•
Accuracy
≤ 1% of reading
Repeatability
≤ 0.2% of reading
3
Dynamics
One measurement every 1s, reaction time T90 < 60s
•
Gas Composition Range
CH
4
70-100 mol%
Higher Alcanes
0-1 mol%
O
2
≤ 3 mol%
C₂H₆
0-20 mol%
N
2
0-15 mol%
H
2
O (Gaseous)
≤ 0.1 mol%
C
3
H
8
0-5 mol%
CO
2
0-3 mol% (20/100 mol%)
1
Dust, Liquids
Without
C
4
H
10
0-3 mol%
H
2
≤ 0.5 mol% (30 mol%)
2
H
2
S
≤ 0.01 mol%
H
s
addressable range
Environment temperature
Medium inlet temperature
Operating gas pressures
Flow rate
27.52 to 50.40 MJ/m
3
(15°C/15°C)
0 to 50°C, 32 to 122°F
Within +/- 2°C, 36°F from environment temperature
960 to 1100 mbar absolute, 13.9 to 16 psi absolute
50 ml/min (+/- 10%), 0.00177 scf/min (+/- 10%)
4
1
only for BlueEye™ Ex-D Renewable & Ultragreen
2
only for BlueEye™ Ex-D Hydrogen & Ultragreen
3
unfiltered 1 second cycle measurement
4
flow rate range customizable on request

BRIGHT BlueEye Ex-D Specifications

General

Brand	BRIGHT
Model	BlueEye Ex-D
Category	Measuring Instruments
Language	English