Gas Analyzer Calorimeter CM6G

The CM6G Gas Calorimeter is used to measure and control the calorific value or Wobbe Index (WI) of the sample gas. In this calorimeter, the sample gas is burnt at the burner with air and the temperature difference between the combustion exhaust gas and the feed air at the burner inlet is detected by using a thermocouple.

This calorimeter detects the flow rate of both the sample gas and the air as the differential pressure by using the orifice and converts the differential pressure to the digital signal then compensates the flow rate variation by the digital calculation. This method gives an excellent high reliability, therefore it can be used for the control of thermal input for the various type furnaces in the steel mill and petrochemical industries, also for the calorie control of the town gas.

* This product is not available in Europe.

Town Gas Application
Measurement object
Measurement and control of WI or the calorific value of fuel gas for town gas.
Measuring Range
3 to 62 MJ/Nm3
Sample gas condition
Dust: 5 mg/Nm3 or less<
Temperature: 50℃ or less
Humidity: dew point of 0℃ or less
Pressure: (1) 10 to 20 kPa: standard, (2) 10 kPa or under: with pump, (3) 100 to 600 kPa: with pressure reducing valve
Range
Select scale range (Span):
General Gas: 30 to 50% of maximum value of the span.
Butane or Butene + Air:20 to 30% of maximum value of the span.
Propane or Propylene + Air: 25 to 40% of maximum value of the span.
Output signal
1 to 5 V DC, 4 to 20 mA DC (simultaneously), non-isolated, load resistance 750Ω or less
Alarm Contact Output
Flame off alarm; 100 V AC, 5 A, closed when alarm occurs
Temperature alarm; 100 V AC, 3 A, closed when alarm occurs
Contact Input
Remote ignition (custom order); 24 V DC, 0.1 A or more
Sample Gas Flow Rate
Approx. 10 l/min
Utility
Instrument Air: Approx. 50 Nl/min, pressure 300 to 700 kPa, dew point of 0℃ or less
Power Supply: 100 V AC ±10%, single phase, 50/60 Hz, 860 VA max.
Panel
Construction: For indoor installation, rack panel.
Ambient Temperature
0 to 40℃ and no rapid change in ambient temperature is allowed.
Repeatability
When the calorific value means 6.3 MJ/Nm3 or higher,
Calorific : ±1.0% of measured value
WI : ±0.5% of measured value


Steel Mill Application
Measurement object
Measurement and control of WI or the calorific value of fuel gas for a steel mill.
Measuring Range
3 to 62 MJ/Nm3
Sample gas condition
Dust: 100 mg/Nm3 or less
Temperature: 50℃ or less
Humidity: dew point of 0℃ or less
Pressure: (1) 8 to 15 kPa: standard, (2) 8 kPa or under: with pump
Range
Select scale range (Span):
General Gas: 30 to 50% of maximum value of the span.
Butane or Butene + Air:20 to 30% of maximum value of the span.
Propane or Propylene + Air: 25 to 40% of maximum value of the span.
Output
1 to 5 V DC, 4 to 20 mA DC (simultaneously), non-isolated, load resistance 750Ω or less
Alarm Contact Output
Flame off alarm; 100 V AC, 5 A, closed when alarm occurs
Temperature alarm; 100 V AC, 3 A, closed when alarm occurs
Contact Input
Remote ignition (custom order); 24 V DC, 0.1 A or more
Sample Gas Flow Rate
Approx. 10 l/min
Utility
Water: Approx. 0.2 l/min, pressure 200 to 600 kPa
Instrument Air: Approx. 50 Nl/min, pressure 300 to 700 kPa, dew point of 0℃ or less
Power Supply: 100 V AC ±10%, single phase, 50/60 Hz, 1100 VA max.
Panel
Construction: For indoor installation, rack panel.
Ambient Temperature
0 to 40℃ and no rapid change in ambient temperature is allowed.
Repeatability
When the calorific value means 6.3 MJ/Nm3 or higher,
Calorific : ±1.0% of measured value
WI : ±0.5% of measured value