Technical data and notes
10
GasLab Q2
G a s Q u a l i t y A n a l y z e r
Page 121 of 135
10.2 Inscriptions and hints on the device
The spatial arrangement and the contents / meanings of the inscriptions and signs are stated below.
These preconditions must be strictly followed
.
10.2.1 Metering ranges and safety notes
The information about gas, approved metering ranges and the safety notes about opening the housing
are on the lid of the connection box.
DO NOT OPEN WHEN POWER IS ON
DO NOT OPEN WHEN AN EXPLOSIVE ATMOSPHERE IS PRESENT
Metering ranges
NB0122 EC TC8494R1
Nature of the Measured Gases :
Natural Gases and Natural Gas-like burnable Gases
Process Gas flow : Qmin 20 l/h Qmax 310 l/h
Calibration Gas flow : Qmin 20 l/h Qmax 60 l/h
Gas Temperature :
T
min -25°C Tmax 55°C
Accuracy class:
Hs: Class A (≤0.5 %), ρ: Class A (≤0.5 %), xCO2: ≤0.2 mol %
Heating value (Hs / HsM / HsV):
8.4 to 13.1 kWh / m³ (corresponding to 30.2 to 47.2 MJ / m³)
Climatic and Mechanical Class : I (indoor) and O (outdoor)
Concentration of CO2 Mole Fraction : 0 - 20%
Density at Base Conditions (Rho) : 0.711 to 0.970 kg / m³
Determination of the compressibility factor according to the
selected standard (ISO 6976 or GPA 2172 or ASTM 3588)
Figure 10.1: Metering ranges
Details and more metering ranges see following table:
Measurements
and ranges
Measurement name
Formula
Range
Output
Heating value #
H
s
30
– 48 MJ/m
3 *
Yes
Standard density
#
(rho)
0.7
– 1.1 kg/m
3 *
Yes
Wobbe index
#
WI
s
33
– 57 MJ/m
3 *
Yes
Dry/wet/saturated CV
#
Yes
Inferior CV and Wobbe
#
H
i
, WI
i
Yes
Methane number
MZ
Yes
Calculated model gas quality
CH
4
…C
8
H
18
, N
2
Yes
*
according to ISO 6976 at T1=25 °C, T2=0 °C
# according to ISO 6976, ASTM 3588, GPA 2172 at all known reference conditions
Accuracy
Class A according to OIML R 140 for a CVDD
Uncertainty
H
s
, W
s
,
≤0.5 %, xCO
2
: ≤0.2 mol%
Repeatability
H
s
, W
s
,
≤0.1 %, xCO
2
: ≤0.1 mol%
Drift
H
s
, W
s
,
≤0.1 %, xCO
2
: ≤0.1 mol% during adjustment interval
