TECHNICAL DATA AND INFORMATION 
Information for general use 
Rev. M / 73023639 
 
11.3.  List of suitable gases and calibration gases 
 
 
 
 
 
 
 
Attention: Gases which may react when there is no air must not be used.! 
 
Mixture (methane + CO
2
)* 
Blend tolerance: ±-2% rel.  
Accuracy: ±-2% rel. 
with automatic calibration cycle  
Flow rate of calibration gas during calibration:  
30 l/h – 60 l/h recommended setting  
Minimum  0.15 MPag ≙ 1.5 bar 
Normal  0.20 MPag ≙ 2.0 bar 
Maximum  0.25 MPag ≙ 2.5 bar  
10 l operational calibration gas 
cylinder 
(not always included in 
Honeywell package) 
Ensure that only suitable standard-compliant types are 
used if you do not source them from Honeywell. 
The cylinder pressure must be greater than 2.0 MPag ≙ 
20 barg.  
Other accessories required: pressure regulators and 
connection lines  
* The mixture depends on the measuring gas. Please use an appropriate gas from the following table 
 
Current measuring  
range for CO
2
 
Preferred gas for 
Operational calibration    Service calibration 
10 mol% CO
2
 + CH
4
 mixture 
20 mol% CO
2
 + CH
4
 mixture 
Gas connections 
(Standard equipment, 
other connections 
available on request) 
Inlets (up to 1 x process gas, 1 x calib. gas) 
Outlets (1 x process gas bypass, 1 x measured gas) 
Swagelok pipe fittings 6 mm or ¼” available from Honeywell 
Gas Manifold 
Gas management  
Integrated two-channel double block and bleed device for process gas 
and calibration gas