Atal AT 505 - General Information; Host Computer Requirements; Environmental Conditions

Chap. I - Gas Analyser
Gas-manual-en.docx — 34 —
**)
CALCULATION OF AIR REDUNDANCE COEFFICIENT λ
The value is calculated from quantities of exhaust gases measured, according to the Brettschneider (BOSCH -
Technical report, vol. 6 (1979), No. 4, page. 177-186). Relation for coefficient λ is
( )
]HC.[
K
]CO[]
CO
[
2
O
4
H
1
])
CO
[]
CO
([
2
O
]
CO
[
]CO
[
5
,
3
5,
3
4
H
]
O
[
2
]CO[
]
CO
[
1
2
CV
CV
2
CV
2
CV
2
2
++⋅






−+
+
⋅














−
+
⋅
+
++
=
λ
,
where [ ] means concentration of elements in % of volume
K
1
re-calculation factor FID to NDIR measuring ( = 6.10
-4
)
H
CV
ratio of atomic numbers of hydrogen to carbon
O
CV
ratio of atomic numbers of oxygen to carbon
25.2 GENERAL INFORMATION
Supply voltage ................................................ 100 to 240 V AC / 47 to 63 Hz or 10 to 18 V DC
Power input ..................................................... 40 W max.
Warm-up time ................................................. 10 min max. (at 25°C)
Communication interface ................................ RS232
Weight ............................................................. 5 kg max.
Dimensions ..................................................... 330 * 178 * 195 mm (depth * width * height)
Operating temperature ................................... 5 to 40 °C
Operating relative humidity ............................. up to 90 % non-condensing
Operating atmospheric pressure .................... 860 to 1060 hPa
Storage temperature ....................................... –10 to 45 °C
25.3 HOST COMPUTER REQUIREMENTS
• Windows 2000/XP/VISTA
• CD ROM drive
• HDD 1GB free
• RAM 256 MB
• Two free RS232 ports (one each for the Gas Analyser and the Universal Speed Sensor/ Temperature
Sensor module)
25.4 ENVIRONMENTAL CONDITIONS
Operating temperature ................................... 5 to 40 °C
Operating relative humidity ............................. to 90 % non-condensing
Operating atmospheric pressure .................... 860 to 1060 hPa
Electromagnetic compatibility ......................... according to EN 61000 - 4 - 2
according to EN 61000 - 4 - 3
according to EN 61000 - 4 - 4
according to EN 61000 - 4 - 5
according to EN 61000 - 4 - 6
according to EN 55022 / A *)
*) Note:
This is a class A product. In a domestic environment this product may cause radio interference, in which case the
user may be required to take adequate counter-measures.