ABB ACF5000 User Manual

ACF5000 FTIR ANALYZER SYSTEM | OI/ACF5000-EN REV. A 75
Example 2
If a test gas other than propane is used, its response factor must be taken
into consideration.
What is the maximum test gas concentration in ppm or mg/m
3
if methane
(CH
4
) is used?
4
C
m
CH
CHppm93.306
12.011 1
22.414 50
Matoms C Number
VMB
[ppm]c
4







m
HCCH
3
CH
V
)Matoms H NumberMatoms C (Number[ppm]c
][mg/mc
4
4



3
4
3
CH
/mCH mg 66.785
22.414
1.008 4 12.011 1 93.306
][mg/mc
4



The response factor for methane is Rf
CH4
= 1.13; i.e. the display of measured
value is too great by this factor. In order to determine the maximum test gas
concentration to avoid exceeding the measuring range, the display of meas-
ured value must be divided by the response factor.
4
CH
CH
maxCH
CHppm 82.572
1.13
93.306
Rf
[ppm]c
[ppm]c
4
4
4

3
4
CH
3
CH
3
maxCH
/mCHmg 59.102
1.13
66.785
Rf
][mg/mc
][mg/mc
4
4
4

A test gas cylinder with approx. 80 ppm CH
4
is ordered. The test gas con-
centration in the test gas cylinder is 81.2 ppm CH
4
according to the certifi-
cate.
This is equivalent to a concentration of
m
CBottle
3
CH
V
Matoms C of Numberc
]C/m[mgc
4


33
CH
C/m mg 43.513
22.414
12.011 1 81.2
]C/m[mgc
4



Considering the response factor, the indication should be adjusted to
3
CHCHCHmax
C/m mg 49.1697 1.13 43.513RfcC/m³] [mgc
444


ABB ACF5000 Specifications

General

Brand	ABB
Model	ACF5000
Category	Measuring Instruments
Language	English