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Process gas analyzer - KM2000 CnHm
The modular constructed ADOS KM 2000 CnHm EM equipment incorporates a microcontroller-aided measurement device for measuring solvents. All combustible gaseous CnHm compounds can be measured with the exception of chlorinated and sulphur-sublimed hydrocarbons.
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| Measurement principle: | Measuring the heat of combustion in a catalytic converter | ||||||||||
| Measuring ranges: | 0 - 50 mg C/m3 TOC up to 0 - 1600 g/m3 TOC | ||||||||||
| Minimum detection limit: | 1 mg C/m3 TOC | ||||||||||
| Cross sensitivity (50 mg/m3 measuring range): |
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| Output signals: | Current interface 0-(4)-20 mA max. load 400 ohm; RS 232 |
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| Response time (t90): | < 200 sec. sampling pipe (approx. 11 m; dead time 10 sec.) | ||||||||||
| Accuracy: | < 2 % full-scale error | ||||||||||
| Permissible ambient temperature: | +5 °C to +40 °C | ||||||||||
| Temperature dependency: | < 5 % full-scale error | ||||||||||
| Sampled gas flow: | 125 l / h (±10 l/h) | ||||||||||
| Preheating time: | approx. 120 min. | ||||||||||
| Maintenance interval: | 4 weeks with auto-calibration 1 week without auto-calibration |
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| Mains supply: | 230 V / 50 Hz; 150 V / 60 Hz; 600 VA | ||||||||||
| Dimensions (W x H x D): | 600 x 478 x 500 mm | ||||||||||
| Weight: | approx. 43 kg | ||||||||||
| Test certificate: | TÜV approval according to the clean-air regulations ("TA-Luft"); TÜV-report: 936 / 21 200 245 |
The thermocouples used for measurements, in conjunction with applying the principle of heat reaction, offer the following advantages:
- High degree of sensitivity
- Good accuracy
- Negligible drift of zero point
- Over-range signals have no effect
Gas measurement system
The sampled gas is drawn in by a pump through a feed pipe (heated if required), to the reaction chamber, via a compensating filter, flow regulator and flow-through meter. The gas is warmed to a constant temperature by means of the heater coil and jacket and finally burned in a solid-matter catalytic converter. The difference in temperature before and after combustion, is used as the measurement signal that is prepared and evaluated by the microcontroller-aided analyser.
The sampled gas is drawn in by a pump through a feed pipe (heated if required), to the reaction chamber, via a compensating filter, flow regulator and flow-through meter. The gas is warmed to a constant temperature by means of the heater coil and jacket and finally burned in a solid-matter catalytic converter. The difference in temperature before and after combustion, is used as the measurement signal that is prepared and evaluated by the microcontroller-aided analyser.
The analyser functions on the principle of heat reaction.The difference in temperatures at the reference measuring point and the measuring point, is a directly-dependent variable of the component part of combustible substances in the gas. The reference measuring point is subjected to the heated non-burned gas mixture, whilst the second probe of the thermocouple pile measures the temperature of the burned gas. A load-independent current of 0-(4)-20 mA is available for connection to electric test meters, plotters and limit value monitors. An RS 232 or RS 485 interface is incorporated for data communication.
The inclusion of a measured value integration provides the facility of forming the average value of measured quantities, continuously or over a prescribed period of time.
The inclusion of a measured value integration provides the facility of forming the average value of measured quantities, continuously or over a prescribed period of time.
The hydrocarbon measuring system ADOS KM 2000 CnHm EM consists of the following 19" rack units:
- Reaction chamber with sensor and electronics
- Gas suction system with or without constant heating for the feed pipes, with sampled gas pump, flow-through meter, flow regulator, flow monitor and filter.
- Microcontroller-aided evaluation unit in 19"-system with application specific standard plug-in Euro-cards
- Housing
Supervision of industrial processes
- KM 2000 CnHm EM:
Measuring the emission of hydrocarbons, according to the German clean-air regulations - KM 2000 CnHm:
Measuring solvent saturation
Measuring the concentration of solvents
Concerning room air (ventilation) monitoring
A warning is issued at very low concentrations of poisonous gas thus preventing any danger to health.
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