Gima 35145, User Manual

Page: 252 / 268

116
Interfering Gas and Vapor Effects
(1) IRMA interfering gas and vapor effects
Note

: Negligible interference, effect included in the specification “Accuracy, all conditions” above.
Note

: for probes not measuring N
2
O and/or O
2
the concentrations shall be set from host. (IRMA CO
2
) meas-
ures neither N
2
O nor O
2
, IRMA AX+does not measure O
2
.
Note  : Interference at indicated gas level. For example, 50 vol% Helium typical decreases Vol% CO
2
read-
ings by 6%. This means that if measuring on a mixture containing 5.0vol% CO
2
and 50 vol5 Helium, the meas-
ured CO
2
concentration will typically be (1-0.06)*5.0 vol%=4.7vol%CO
2
.
Note

: according to the EN ISO 21647:2004 standard.
Note  : in addition to the EN ISO 21647:2004 standard.
(2) ISA interfering gas and vapor effects
Gas or vapor Gas level CO
2
Aesthetics N
2
O
N
2
O

60 vol%

&
 
&
  
HAL

4 vol%
   
ENF, ISO, SEV 
5 vol%
+8% of the reading    
DES

15 vol%
+12% of the reading
   
XE (Xenon)

80 vol%
-10% of the reading
  
HE (Helium)

50 vol%
-6% of the reading
  
Metered dose inhaler
propellants 
Not for use with metered dose inhaler propellants
C
2
H
5
OH (Ethanol)

0.3 vol%
   
C
3
H
7
OH (Isopropanol)

0.5 vol%
   
CH
3
COCH
3
(Acetone)

1 vol%
   
CH
4
(Methane)

3 vol%
   
CO (Carbon monoxide)

1 vol%
   
NO (Nitrogen monoxide)

0.0250 vol%
   
O
2
100 vol%
 &   &   
Gas or vapour Gas level CO
2
Aesthetics N
2
O
N
2
O

60 vol% ISA CO
2
ISZZX+
 
HAL

4 vol%
   
ENF, ISO, SEV

5 vol%
+8% of the reading
   
DES 
15 vol%
+12% of the reading    
XE (Xenon) 
80 vol%
-10% of the reading   
HE (Helium)

50 vol%
-6% of the reading
  
Metered dose inhaler
propellants

Not for use with metered dose inhaler propellants
C
2
H
5
OH (Ethanol)

0.3 vol%
   
C
3
H
7
OH (Isopropanol) 
0.5 vol%
   
CH
3
COCH
3
(Acetone)

1 vol%
   
CH
4
(Methane)

3 vol%
   
CO (Carbon monoxide)

1 vol%
   
NO (Nitrogen monoxide)

0.0250 vol%
   
O
2
100 vol%
   