Chroma DID

Principle:

The chroma DID is an automatic, industrial or laboratory trace gas analyzer. The temperature setting is isothermal. The sample comes throuh the sampling loop. Then the sample is injected into an analytical column (with an automatic valve) for separation. Different columns can be used (e.g. packed column).

After separation, the amount of each compound is measured using a discharge ionization detector.

An oven is installed in order to allow the regeneration (to avoid contamination) of the column at 250°C (in option)

The Discharge of Ionization Detector:

Placed behind the chromatographic column, the Discharge Ionization Detector is able to detect different kind of compounds. A high voltage is applied to ionize the compounds. During this step, the different compounds will deliver electrons. The number of electrons delivered will be proportional to the compounds concentration. Then, a potential difference will be observed. This value is transferred to an electrometer and the generated signal is proportional to the compounds concentration in the sample. The signal is then transferred to the CPU board and the micro-processor processes the data (integration, mass or concentration calcul, peaks identification…). The different parameters (data, chromatogram, integration report…) are transferred via a RS-232 port and they are visualised and reprocessed with our VISTACHROM software.

VISTACHROM software:

ChromatotecTM developed software system enables:

• Remote control
• Full traceability with on board archiving of results
• Programation and control of threshold alarms
• Ponctual (laboratory) or continuous measurement
• Data export by MODBUS / JBUS / MGS1 / 4-20mA / 0-10V

The Vistachrom software enables the user to visualize and store data on a computer. Furthermore it provides comfortable utilities to recalculate, calibrate and export data and to set-up measurement. The airmo TREND software allows the calculation of retention time, area, mass or concentration profiles.

CALCULATION AVERAGE can be made for better precision

Options:

On-line results are transmitted via :

• Gas cleaner
• Modul 4 x analog output 4-20 mA or 0-10 V.
• Alarms module XXX005
• Automatic results validation.
• 24 V power supply.
• Hydrogen and Nitrogen generator
• Multiple stream selector (2 to 48 streams with one analyzer)
• Carrier gas purificator
• Sampling pump in 24V DC or airmoPUMP (XXX901 or XXX915)
• Pressure and temperature measure of sample
• Mass Flow Controller (MFC, in order to improve dilution precision and so calibration quality)