Hach IL 550
Objektnummer | B00017748 |
---|---|
Numéro d'identification | 017748 |
Nom de l'objet | Hach IL 550 |
Statut | Archiv |
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Paiement par facture est possible pour clients professionnels. |
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Labprocure |
Occasion |
Responsable du contenu de l‘offre d’appareil est la société Labprocure GmbH, comme annonceur. Labprocure assume la responsabilité des offres annoncées ici ainsi que des photos et des textes d’offre inclus. Labprocure GmbH, Bruckstraße 58, 72393 Burladingen. |
manufacturer : Hach
model : IL 550
annotation : Dokumente engl.
The following illustrations and descriptions refer to the instrument model and are drawn from brochures. They do not represent the scope of delivery. Please refer to the text of the offer for the exact scope of delivery.
Overview of product and function
The IL550 TOC-TN/IL530 TOC-TN analyzer determines the total carbon content and total nitrogen content of aqueous samples. Samples are digested using thermocatalytic high-temperature oxidation in the presence of special catalysts.
The analyzer can determine the total carbon content of small amounts of solid samples with the help of the integrated solids module or by connecting an external solids module.
The analyzer can be used in the following applications:
Water treatment
Environmental monitoring
Power stations
Waste and soil
Research and training
System structure
The IL530 TOC-TN and IL550 TOC-TN analyzers are compact tabletop instruments. The main components are permanently built into the basic analyzer. Accessories and reagents are connected or made available to the basic instrument for the purpose of performing tests.
The analyzer is controlled and the measurement data are evaluated with the help of the OmniToc control and evaluation software, which is installed on an external PC.
All components of the analyzer that have to be used for operating or maintenance purposes are accessible through two doors on the front of the analyzer, the left removable side panel, or the top
left panel.
The analyzer consists of the following main components:
Components for sampling
Pneumatics/tubing system
Combustion system
Components for drying and purifying the measurement gas
Detectors
Display and operating elements, with connections
Electronics unit
Accessory modules
IL550 TOC-TN Components
Figure 4 through Figure 6 describe the component layout of the IL530 TOC-TN
1 Condensate pump
2 Halogen trap
3 Needle valve for setting the NPOC purge flow
4 Water traps
5 Phosphoric acid pump
6 Reagent bottle for phosphoric acid
7 Collector tray
1 Pneumatic assemblies for gas supply
2 Combustion system
3 TIC condenser module (coil condenser at the back)
Performance specifications
Digestion principle Thermocatalytic oxidation
Digestion temperature Up to 950 °C (1742 °F)
Catalyst
For liquid samples Pt/A l2 O 3
For solids module (internal) CeO 2 (Special catalyst)
Measurement methods TC, TIC, TOC (Difference method), NPOC, TNb (optional)
In accordance with:
TOC: DIN EN 1484, ISO 8245, EPA 415, ASTM D2579, DIN 38409 H3 TNb: DIN 38409 Part 27, DIN EN 12660
Carbon detection NDIR (in the IL550 TOC-TN coupled with VITA® method)
Nitrogen detection CLD, ECD
Sample volume 50 µL to 500 µL
Particle tolerance In accordance with DIN EN 1484
Only for particle-tolerant syringes
Sample introduction:
For IL550 TOC-TN Direct injection through septum-free port
For IL530 TOC-TN Direct injection through port with septum
Gas supply Synthetic air (hydrocarbon free) or oxygen (at least 99.995%)
( carrier gas/NPOC auxiliary Admission pressure 46 bar
gas for injector port)
Gas consumption:
Total Approximately 15 L/h, depending on measurement mode
Measurement gas flow 160 ± 3 mL/min
Purge flow Approximately 50 to 160 mL/min
Measurement gas flow for internal solids
module (optional) 400± 3 mL/min
Control/evaluation Real time graphs, status display during the analysis, graphic
(OmniToc control and representation of the measurement results, printout of the
Evaluation software) results
Physical and environmental specifications
Width 512 mm
Height 540 mm
Depth 530 mm
Weight 28 kg
Operating requirements 1035 °C (5095 °F), max. 90% relative humidity (non-condensing)
Storage requirements 555 °C (41131 °F), 1030% (use desiccant)
Atmospheric pressure 0.71.06 bar
Additional technical data
Power requirement (two 115 V, 50/60 Hz or 230V, 50/60 Hz
models , not user-
configurable )
Installation category II
Pollution degree II
Fuses 115 V: 50/60 Hz: T, 10A H, 250V (2), OR 230 V: 50/60 Hz: T, 6.3A H, 250V (2)
Average typ: power consumption 1000 VA
Interface to PC RS232
Interference suppression Interference suppressed in conformity with EN 55022 class
( electromagnetic compatibility) A and BMPT Vfg. 243/1991
Detectors
NDIR detector
The NDIR detector (Non-dispersive Infrared absorption detector) is located behind the right side panel of the analyzer. Gases with molecules that contain different types of atoms have specific absorbance bands in the infrared spectrum. If a beam of light is transmitted through a cell that contains gases in the infrared-active range, these gases absorb a fraction of the total light at their characteristic wavelengths. This fraction is proportional to their concentration in the gas mixture. The light receptors in the NDIR detector are selective for carbon dioxide. Two measurement channels are evaluated in parallel. Depending on the carbon dioxide content of the measurement gas, the measuring range is switched dynamically.
Processing measured values with the VITA method in the IL550 TOC-TN
The carbon dioxide molecules are measured for as long as they are present in the cell of the NDIR detector. Fluctuations in the measurement gas flow during the carbon dioxide measurement (e.g. from evaporation and condensation when liquid samples are injected) occasionally cause carbon dioxide molecules to be measured spectrometrically for a longer (lower gas flow) or shorter (higher gas flow) time.
The VITA method (retention time coupled integration for TOC analyses) measures the measurement gas flow in parallel to the NDIR signal. Fluctuations in the flow are compensated for by a computer-aided standardization of the NDIR signal to a constant
gas flow. Integration is performed after the NDIR signal is standardized. A highly accurate digital flow meter is installed beside the NDIR detector for this purpose.
Electrochemical NO detector (ECD, optional)
The electrochemical NO detector can be used to determine total bound nitrogen (TNb). The NO detector is behind the right side panel of the analyzer.
The NO detector analyzes the nitrogen oxide (NO) content of the carrier gas. The measurement gas formed by thermal oxidation of the sample enters the detector, where the nitrogen oxides in the gas diffuse through a highly selective membrane and into the electrochemical measuring cell. The nitrogen oxides undergo oxidation at the anode, causing a change in the current between the electrodes. This change is proportional to the concentration of the nitrogen oxides. The change in the current is evaluated as a signal and enables the nitrogen content of the sample to be determined (TNb determination). The electrolyte in the measuring cell serves only as a catalyst and is not consumed. A supply voltage is needed for the operation of the electrochemical NO detector.
A backup voltage (supplied by a U9VL ultra life battery) is needed to maintain the internal equilibrium of the ECD in the intervals between measurements (analyzer is switched off). The battery is located in the right side of the analyzer.
ChemiLuminescence detectors (CLD, optional)
TNb can also be determined by connecting a chemiluminescent detector to the analyzer. The CLD is an external add-on that stands to the right of the instrument (Appendix C ChemiLuminescence detector (CLD) on page 173).
The measurement gas formed by thermal oxidation of the sample is dried and then enters the reaction chamber of the
chemiluminescent detector, where the TNb is determined. The nitrogen monoxide in the measurement gas is oxidized by ozone to nitrogen dioxide. The excited nitrogen dioxide molecules emit light quanta (luminescence) as they revert to the energy ground state. The luminescence is measured with the help of a photomultiplier and is proportional to the nitrogen monoxide concentration. It can therefore be used to determine the total nitrogen content of the sample. The reaction chamber is maintained at a negative pressure in order to suppress quench effects.
Add-on options
Sampler
The ASX 60 sampler (Figure 26) is fastened to the basic instrument by means of four hexagon-socket screws. It is suitable for both homogeneous and inhomogeneous particle-containing samples. Each sample can be stirred individually just before the analysis. The stirrer speed can be selected manually. In the NPOC mode, the samples can be automatically acidified.
Integrated solids module
A special reactor and port with manual feed can be integrated into the combustion system of the analyzer to enable small quantities of solid samples to be analyzed (Figure 27). Digestion temperatures of up to 950 °C (1742 °F) can be reached. The digestion takes place in the presence of a catalyst.
External solids module
An external HSC solids module can be connected to the analyzer to enable solid samples to be digested at temperatures of up to 1300°C