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K 2002
Hinweis: Dieses Dokument ist gegenwärtig nur in englischer Sprache verfügbar.
Applications
- Electronic wafer fabs
- Gas management systems
- Gas purifier efficiency monitoring
- Specialty gas laboratories
- High purity Argon plant
The K2002 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 K2002. 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 K2002 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 K2002 a choice instrument for the air separation industry. It is very popular, for example, in truck-loading stations.
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
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The following features set the K2002 apart from the competition:
- Display resolution to 10 ppt
- Plasma emission system
- Microprocessor controlled
- No sensor or detector to replace
- Low sample flow
- Fast response
| Detector type |
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Single beam. Electromagnetically induced plasma cell. Non ratiometric measurement, Material: Quartz, single element, vacuum tight to 10 PSIG (69 KPAG) |
| Range |
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0 - 100 ppb display resolution to 10 ppt
0 - 500 ppb, resolution to 1 ppb
0 - 5 ppm, resolution to 0,01 ppm |
| Accuracy |
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Better than ± 1,5 % of reading in 0-100 and 0-500 ppb
Better than ± 1 % of reading 0-5 ppm |
| Sensitivity |
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guarantee 1 ppb |
| Sample flow requirements |
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25 sccm |
| Gas connections |
|
Sample: 1/8" swagelok tube fitting
Vent: 1/8 swagelok tube fitting |
| Recommended calibration gas |
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Zero: from purifier
Span: 1 to 3 ppm or dilution system (orifice based) |
| Flow accuracy |
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0 to 200 sccm ± 1 % full scale |
| Recommanded Maximum operating pressure |
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10 PSIG to 20 PSIG for 25 cc/min.
(70 KPAG to 140 KPAG) |
| Recommended minimum operating pressure |
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8 PSIG (56 kPAG / 0,56 barg) for 25 cc/min |
| Operating temperature |
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10º C to 35º C, software temperature compensation. Detector system is temperature regulated in an insulated compartment (thermo-cool system). |
| Sample inlet |
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¼" VCR |
| Sample vent and by-pass vent |
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1/8" Swagelok |
| Supply |
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115 VAC, 50 - 60 Hz or 220 VAC, 50 - 60 Hz |
| Power consumption |
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Maximum 35 watts |
| Response time |
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less than 90 seconds for 63 % of a step change at 25 sccm (typically 60 seconds) |
| 4-20 mA |
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4 - 20 mA isolated output
Maximum load impedance: 600 ohms at 20 mA DC
Isolation: 750 VDC or AC peak maximum |
| Weight |
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15 kg (33 lbs) |
| Standard features |
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Digital outputs for remote monitoring :(all dry relay contacts, SPST 1 amp 250 Vac resistive load)
4 digital outputs, 3 are for range id, 1 for system status monitoring
2 alarm outputs (user programmable set point)
fully microprocessor controlled
self-diagnostic system software
isolated 4-20 mA output |
| Options |
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Serial port: RS-232/422/485/modem
Custom option: contact factory |
| Dimensions |
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Standard rack mount 3 U, 5,25" high, 18" deep, 19" wide |
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