Applications
- Air separation plants
- Argon purification plants
- Cryogenic truck loading stations
- Specialty gas laboratories
- Process control
- Steel industries
- Chemical plants
- Gas management system
- Welding gas control
The K2001 analyzer is based on a spectroscopic emission cell, which is not a new technique in itself. It is in fact, the frequency, intensity, regulation as well as the coupling technique and focusing (stabilizing) electrodes used to keep the plasma stable that are the main characteristics that make it so sensitive, stable, and reliable.
The cell volume is less than 1 c.c. The power coupling to the cell and the stabilizing electrodes help maintain plasma position and minimize turbulence caused by gas velocity. All this ensures a better penetration of the analyte (N2) into the plasma zone. The reaction involved into the cell may be described as follows:
Ar* + N2 (X1Sg+)ot?Ar + N2 (C3llu)
This is the action of metastable argon on nitrogen molecules. There is a strong emission of the second positive system of N2, from the vibrationnal level vl = 0. There is also a charge transfer ionisation/excitation involved caused by the transfer of charge between ions and atoms. Further information on this subject, however, will be found in future editions of the newsletter.
Special attention is paid to the optical system. Each optical filter selected is tested with our spectrometer system before being included in a K2001. We select a filter coating to achieve optimum temperature stability and to avoid moisture-associated problems. This filter is coupled with a lens that focuses the beam of light so as to fix the center wavelength of the filter properly. The light is then directed to an enhanced photo diode. All these components are mounted in a cartridge to maintain optical path alignement.
The signal conditionning differs in many respects from the competition. The K2001 amplifies the signal by direct-charge transfer. The new K2001 series comes standard with an analog-to-digital resolution of more than 1 part per million (20 bits) compared to the competition's 1 part per 4095 (12 bits). There is no bulky photomultiplier tube (PMT) with high voltage or a chopping wheel. Consequently, you do not have the problems associated with such systems.
The entire system is controlled by a microprocessor. The quality of both parts and assembly makes the K2001 a choice instrument for the air separation industry. It is very popular, for example, in truck-loading stations.
The following features set the K2001 apart from the competition:
- User-friendly operator interface
- Built-in diagnosis system
- Automatic calibration system available
- RS-232 or RS-485 communication port for data transmission or modem (a free communication software is include with theses options)
- No maintenance required (nor consumable parts)
- Automatic flow regulation system
- Typical 10-second response time for rate of change over 90%
- Three measuring scales : 0-1, 0-10, 0-100 ppm (10 ppb resolution)
- Exceptional stability (typical drift less than 1% over a month)
- Automatic or manual scale change
- Low gas consumption (works with as little as 25 cc/min.)
- Particle filter
- Preconditioned stainless steel tubing
- Every analyzer includes software and data file representing a 24-hour minimum duration performance and drift test
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Technical features
- Guaranteed 10 ppb resolution/2 ppb noise
- Measuring system based on spectral emission of an argon plasma maintened in a quartz chamber, controlled by a microprocessor system
- Easy to operate
- Solid state mass flow controller
- Low sample flow (works with as low as 25 sccm)
- Low power (35 watts)
- No valves, columns, or carrier gas
- No radioactive source
- No moving parts, all solid state
- No sensor or detector to replace
- Maintenance free
- Real Time Clock
- Alarm Historic
- CE conform and CSA on demand
- Internet/Web enabled
| Detector type | | Single beam. Electromagnetically induced plasma cell. Material: Quartz, single element, vacuum tight to 10 PSI (69 kPA) / New Patent Pending Detector (to be released) | | Range | | 0 - 1 ppm, resolution to 10 ppb
0 - 10 ppm, resolution to .1 ppm
0 - 100 ppm, resolution to 1 ppm | | Accuracy | | Better Than ± 1 % of full scale | | Sample flow requirements | | 30 to 150 sccm | | Gas connections | | Sample: 1/8" swagelok tube fitting
Vent: 1/8 swagelok tube fitting | | Recommended calibration gas | | Zero : 1.0 to 2.0 ppm N2/Ar
Span : 8.0 to 9.5 ppm N2/Ar (For 0 - 10 Pppm range) | | Flow accuracy | | 0 to 200 sccm ± 1 % full scale | | Recommanded maximum operating pressure | | 20 PSIG (138 kPAg / 1,38 barg) | | Recommended minimum operating pressure | | 4 PSIG (28 kPAG / 0,28 barg) | | Operating temperature | | 10º C to 35º C | | Supply | | 115 VAC, 50 - 60 Hz or 220 VAC, 50 - 60 Hz | | Power consumption | | Maximum 35 watts | | Response time | | 20 seconds for 90 % of a step change at 75 sccm (typically 10 seconds) | | Drift | | ± 1 % over 24 hours (typically ± .5 % over long term) | | Weight | | 15 kg (33 lbs) | | Options | | Auto-zero, auto-span calibration, done at user preselected interval; Digital outputs for remote monitoring :(all dry relay contacts, SPST 1 amp 250 Vac resistive load)
System status (1 output)
Range in use ( 3 outputs)
2 alarm outputs (user programmable set point)
4 - 20 mA isolated output
Maximum load impedance : 600 ohms at 20 mA DC
Isolation: 750 VDC or AC peak maximum
Serial port : RS-232/422/485/modem
Custom option: contact factory
Internet/Web Enabled | |
