Gasmet CEMS

General data

Measuring principle

• Fourier transform infrared (FTIR) spectroscopy
• for oxygen: ZrO2 measuring cell (optional)
• for total carbon (C_total, THC, TOC)
  
  
  • FTIR, not performance-tested (standard)
  • FID analyzer, also performance-tested in accordance with EN 14181 if required (option)

Performance capability

Simultaneous analysis of up to 50 gas components
Standard: 16 components

T90 time

< 180 s, with 20 m sample gas line

Climatic conditions

• Ambient temperature during operation

0 ... 40 °C, non-condensing

• Ambient conditions during storage and transportation

-20 ... 60 °C, 0 ... 95% relative humidity, no condensation!

• Site

Indoors, dust-free, clean ambient air, no external vibrations

Ex zone

Non-Ex area (IEC General Purpose)

System design

• Type

Cabinet configuration

• Cabinet degree of protection

IP54

Electrical connections

• Supply voltage (alternative 1)

3 phases 115 V AC (-15 %, +10 %) / 60 Hz, 32 A + neutral + ground (TN-S)

• Supply voltage (alternative 2)

400 V AC (-15 %, +10 %) /50 Hz,
3 phases 230 V AC (-15 %, +10 %) / 50 Hz, 16 A + neutral + ground (TN-S)

• Power consumption

Gasmet CEMS with 20 m heated sample gas line: approx. 7.5 kW

Dimensions (with plinth)

2 100 x 600 x (800 + 250) mm (H x W x D)

Weight

Gasmet CEMS with FTIR and O₂ analyzers: Approx. 320 kg *)

Electrical inputs/outputs

Analog inputs/outputs

• Analog outputs

16 channels, 4 … 20 mA, isolated, freely programmable

• Analog inputs

8 channels, 4 … 20 mA, isolated, freely programmable

Digital inputs/outputs

• Digital outputs

16 channels, 24 V DC, freely programmable

System alarm, maintenance requirement, maintenance, measured value overshoot, valid measured value

• Digital inputs

16 channels, floating contacts

Temperature alarm sampling probe, temperature alarm analysis cabinet, alarm air-conditioning unit on the analysis cabinet, alarm zero gas pressure, alarm O2 analyzer, activated scan gas infeed via sampling probe, activated system standby

Optional expansions

Up to 255 terminal strips

Interfaces (optional)

RS 232, RS 422/485, Modbus, PROFIBUS

Sampling unit

Temperature controller for heated sample gas lines

0 … 180 °C

Type of temperature sensor in sample gas lines

K type (Ni-Cr-Ni element)

Gas inlet conditions

• Max. sample gas pressure at inlet to sample preparation system

1 500 hPa

• Sample gas temperature at inlet to sample preparation system

180 … 200 °C, non-condensing

• Dust content at inlet to sample preparation system

Dust-free

• Instrument air

Oil-free and dust-free instrument air, dew point < ?40 °C

• Flow rates

• Sample gas: 2 ... 5 l/min
• Zero gas: Approx. 0.5 l/min
• Span gas: Approx. 0.5 l/min
• Instrument air to rinse the FTIR spectrometer:
  
  
  • Normal mode: Approx. 0.5 l/min
  • Safety purging: Approx. 4 l/min
• Reference air for optional O₂ measurement: Approx. 0.7 l/min

• Gas inlets

Sample gas (heated to 180 °C), span gas, zero gas, instrument air

• Gas outlets

FTIR analyzer (heated), O₂ analyzer (heated), span gas for sample probe, interferometer purging, reference air for O₂ analyzer

• Gas connections

Swagelok 6 mm, for sample gas lines with 4/6 mm internal/external diameters of the Teflon core. The external diameter of the sample gas line including preassembly on the side of the connection to the sampling unit must be no more than 43 mm.

Sample gas pump

• Material

Stainless steel 316

• Diaphragm

PTFE

• Maximum flow rate

4 l/min

• Heated filter

For particles > 2 µm

Valves

• Solenoid valves

Sample gas / backflushing, span gas via sample outlet, span gas via sample probe, zero gas, instrument air (safety circuit)

• Shut-off valves

Sample gas/backflushing, gas infeed for maintenance purposes

FTIR spectrometer unit

Measuring principle

Fourier transform infrared (FTIR) spectroscopy

Spectral resolution

Standard: 8 cm^-1

Scan rate

10 scans / s

Detector

Peltier cooled MCT

Infrared light source

SiC, 1 550 K

Beam splitter and window material

ZnSe

Spectral range

4 200 … 900 cm^-1 (2.4 … 11 µm)

FTIR gas cuvette

Multiple path gas cell with fixed optical path length: 5.0 m

• Material

Standard: 100% rhodium-coated aluminum

• Mirror

Gold coating

• Cuvette volume

0.4 liters

• Seals

Standard: Viton O rings, others: On request

Window material

BaF₂

Interferometer purging

• Oil-free and particle-free instrument air, dew point < ?40 °C, 0.5 l/min
• Nitrogen (at least 5.0)

Measuring performance

• Zero point checking:

Recommendation: Automatic "zero point calibration" with nitrogen every 24 hours
(Quality of the nitrogen: 5.0 or higher)

• Zero point drift:

< 2 % of the measuring range of the "zero point calibration"

• Linearity error

< 2 % of the measuring range

• Temperature impact

< 2 % of the measuring range per 10 K temperature change

• Pressure influence

1 % of the measured value at 1% sample gas pressure change. Ambient pressure fluctuations are measured and compensated for

Oxygen analyzer (optional)

Measuring principle

ZrO₂ measuring cell

Detection limit

< 1 ppm O₂

Reference gas

• Oil-free and particle-free instrument air, dew point < ?40 °C
• Span gas

Sensor material

Stainless steel 316 (1.4571)

Gas flow

Minimum 0.1 l/min

Measuring ranges

Min. 0 … 2 vol.% O₂
Type 0 … 25 vol.% O₂

Accuracy

± 0.2% of the measuring range

FIDAMAT 6 (optional)

See "Continuous gas analysis, extractive"

Measuring principle

FID analyzer