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Model 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.
Features
  • The construction of the detector is solid and durable, and easy for maintenance and operation.
  • Special patent construction is adopted at the mixing point of the heat exhaust gas and the heat absorbing air from the detector, and it improves the response time.
  • Excellent high reliability by using orifices to detect differential pressure both air and gas and to calculate after compensating the indication errors caused by the flow rate variations.

Specifications

Ambient Temperature Range

  • 0° to 40° C (32° to 104° F)

Applications

  • Steel Mills
  • Town Gas Application

Approvals & Certifications

  • EMC EN 61326-1

BSP Connection

  • 1/2” BSPT Female
  • 1/4” BSPT Female

Current

  • 2 mA or Less - Leakage Current

Element

  • Polypropylene - Element Material

Enclosure Finish

  • Munsell 3.2PB7.4/1.2 (Inside & Outside) - Paint Colour

Enclosure, Body Material

  • 316 Stainless Steel - Fulflo Filter

Flow Rate

  • Approximately 0.2 L/minute - Water
  • Approximately 10 I/min - Sample Gas Flow Rate
  • Approximately 50 NI/min - Instrument Air

Frequency

  • 50/60 Hz

Input

  • 24 Vdc, 0.1 A or more - Remote Ignition: Contact Input
  • 3.15 A - Fuse

Insertion 'U' Length

  • 255.90” to 649.60” (650 to 1,650 cm) - Insertion Length: Probe

Materials of Construction

  • Brass

Measuring Range

  • 3 to 62 MJ/Nm³

O-Ring Material

  • P16 (Viton)
  • P20 (Silicon)

Output

  • 100 Vac, 5 A & 3 A - Flame Off Alarm & Temperature Alarm: Alarm Contact Output
  • 1-5 Vdc
  • 4-20 mA DC

Output Load

  • 750 ohms or Less

Power Supply

  • 1,100 VA, Max.
  • 100 Vac ± 10 %, 860 VA, Max.
  • 100 Vac at 50 Hz & 60 Hz

Pressure Range

  • psi: 1.16 to 87.02 (kPa: 8 to 600, bar: 0.08 to 6)

Repeatability

  • ± 0.5 % Measured Value for 6.3 MJ/Nm³ or Higher - WI Measurement
  • ± 1 % Measured Value for 6.3 MJ/Nm³ Low & High Calorific Value
  • ± 1.5 % Measured Value for Below 6.3 MJ/Nm³

Response Time

  • 41 to 60 seconds or Less at 63.2 % Response Time for Town Gas Application
  • 45 to 70 seconds or Less at 63.2 % Response Time for Steel Mill Application

Size

  • 0.059” (1.5 mm) Nominal Size - Hexagon Wrench
  • 0.098” (2.5 mm) Nominal Size - Hexagon Wrench
  • 50 µm - Pore Size

Span - Maximum

  • 20 to 30 %, Max.
  • 25 to 40 %, Max.
  • 30 to 50 %, Max.

Temperature Range

  • 50° C (122° F) or Less

  • Steel Mills
  • Town Gas Application

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