manufacturer :       Process

model :                   PI-200 I

annotation :           Dokumente engl.

The PI-200 Raman instrument can be used in the laboratory or on-line for process control. The purged enclosure can be provided for Class I, Div 2 or Class I, Div 1 environrnents and is capable of providing either Z- or X- type purging. The Raman instruments ineorporate a frequency-stabilized, narrow-linewidth diode laser (Patent No. 6,100,975); a temperature-controlled, optically fast ( f/2.0) fiber-coupled spectrograph (Patent No. 6,028,67); a very low noise Andor CCD camera TE-cooled to < -60 °C; and PROspect data acquisition and analysis software. The PROspect software can be icombined with GRAMS/AI8.0* for real-time chernometrics and process control applications. This Raman instrument design offers very high signal levels while retaining high resolution (~ 4 to 5 cm ^-1 depending upon excitation wavelength). Patented optical design allows full (3.3 mm) height coverage of

the 1024 x 128 pixel CCD chip and wide fiber array input (17 X 100 rnicron diameter fibers) while retaining a straight fiber array image and good resolution. The system includes a fiber-coupled probe with laser band-pass and elastic light rejection (~10 ^-8 ) filtering. With the 1200 grooves/mm grating, the speetral coverage is ~ 2100 cm ^-1 at 785 nm excitation. The grating is adjustable to allow use with xeitation from 670 to 860 nm. The spectra can be exported in SPC or ASCII formats.

Excitation Source

• 785 nm Frequency-Stabilized, Narrow-Linewidth Laser.
• Laser power (adjustable): 450 mW standard.
• Higher power levels available - up to 1,500mW
• Line width ~ 1.0cm ^-1 .
• Wavelength accuracy ±0.1nm.
• Wavelength repeatability (on/off) -< 0.15 cm ^-1 .
• Wavelength stability -< 0.3 cm ^-1 drift per week.
• Patented design - Pat. No. 6,100,975.

Raman Fiber-Optic Probe

• Inphotonics Raman Probe-standard (other probes types available).
• 200µm diameter excitation fiber, 400µm collection über.
• Focal length - 5mm standard, 3 meter fiber-optic cable.
• Rayleigh filteringbuilt into probe tip (>8 O.D.).
• System can accommodate most any Raman probe configtu-ation.
• Probes manufactured from 316-SS, carbon steel, alloy-20, hastelloy, etc.
• Ball probes also available.
• Lowest Raman shift that can be measured ~225 cm ^-1 .
• ATEX Zone 0 certified.

CCD Detector

• Andor DU401-FI (standard) Higher performance CCD detectors available.
• TE cooling to < -60° C for low noise applications.
• Pixel size = 26 µm square and full range arca of 128 x 1024 pixels.
• Other CCD configurations available; e.g., 256 x 1024 pixels..

Spectograph

• Spectograph aperture: f/2.0.
• Focal length: 135 mm.
• Patented design: No. 6,028,667.
• Diffraction grating: 1200 grooves/mm, ruled standard (other gratings available upon request).
• Resolution: 4 cm ^-1 with 785 nm excitation .
• Spectral coverage: with 785 nm excitation ~2100 cm ^-1 , with 830 nm
• excitation the spectral coverage is ~1900 cm ^-1 .
• Fiber-optic coupling: bundle-to-slit adapter with 100 µm fibers (17 fibers) in a linear input array (3.3 min high) for coupling to spectrograph.
• Temperature controlled: ~30° C for added stability.
• Image curvature at exit plane: < 0.5 pixel over full height of CCD an-ay.
• User-adjustable center wavelength via rotating grating.
• Built-in neon lamp for wavelength calibration.

Packaging

• Laboratory bench top (20" x 16" x 8"), weight ~ 66 lbs.
• On-Line 19" rack mount dimensions (80" x 23" x 40"), weight ~ 430 lbs.
• On-Line Purged enclosure rack mount (72" tall x ~ 28" wide x ~ 36" deep)

Multiplexing

• Up to 18 channels with fiber switcher (17" x 17" X 10"), weight 55 lbs.
• Insertion Iss is less then 1 dB.
• Switching time between channels is ~ 0.5 s.
• Patented design: No. 6,859,581B1.

On-Line Instrument

• Includes backup laser with an AUTO SWAP feature to automatically switch in the backup laser should the primary laser fail.
• Includes a backup computer with hot swappable ARA1D drives that can be quickly used if the primary computer should fail.
• Lasers can be easily switched out with no user optical alignment.
• Software features include automatic X- and Y-axis calibration, real-time ehemometrics, and continuous laser tracking to ensure stable operation.
• Backup features along with auto calibration ensure that there is minirnal downtime (typically < 2 hours/year/channel).
• Includes modeling for 1 ^st year of use, model training at our facility.
• Remote monitming of system health available.

System Software

• Data collection with real-time chemometrics, laser frequency tracking, multipoint neon lamp absolute wavelength calibration, and throughput normalization features for chemometric model transfer capability.
• Auto calibration features available
• Interface with a DCS system, RS485, or RS232 .
• Data files can be exported into ASCII and SPC formats.

System Stability

• Amplitude stability ±0.2 % over 24 hours after 30 minutes warmup.
• Frequency stability ±0.1 cm ^-1 over 24 hours after 30 minutes warmup.

Power Requirements

• 115 to 230 VAC, 47 to 63 Hz.
• Lab 4 A, On-line 10 A.