OBLF spectrometers have a number of characteristics that confirm their high reliability and analytical capabilities compared to optical emission spectrometers from other companies:
OBLF spectrometers use the latest achievements in the field of analytical instrumentation.
OBLF spectrometers use thermal compensation of a diffraction grating and an optical system frame placed in a vacuum chamber. In addition, to expand the analytical capabilities of the spectrometer, thermostating of the vacuum chamber and electronics is used.
The spectrometer has very high stability, convergence and reproducibility of the analysis results. As a result, the need for frequent recalibration of the spectrometer with a large consumption of expensive recalibration samples is eliminated. Recalibration of OBLF spectrometers is carried out if necessary.
OBLF spectrometers do not require prompt intervention in the spectrometer chamber, however, even if intervention in the spectrometer chamber occurs in case of emergency, this does not lead to spectrometer downtime, but only requires additional recalibration for the thermostating period (less than four hours).
As shown by the long period of operation of OBLF spectrometers, the placement of electronics in a vacuum chamber not only improves the analytical capabilities of the device, but also increases its reliability, eliminates failure of the electronics due to temperature and humidity changes in the room where the spectrometer is installed.
OBLF spectrometers use a single vacuum pump. The duration of the vacuum pump is only 3% of the working time, which eliminates the heating of the vacuum oil and the ingress of oil vapor into the spectral chamber and there is no need to install an additional turbomolecular pump.
1. Spark table / tripod
Purged with argon. Optimized to reduce argon consumption (approximate argon consumption is 2.4 l per 1 burn, or about 1 cylinder of 40 l per month at a load of 50-60 pr per day.
Self-cleaning with an argon pulse 3 atm.
Patented system for detecting low carbon concentrations.
Automatic pneumatic clamping of samples.
Automatic cleaning of the electrode and the surface of the spark table.
An open rack allows quick sample changes (in automatic and manual mode).
Adapters for the analysis of small and wire samples (in manual mode).
2. Vacuum system
Cast, pumpable, light alloy
Reduced pump down time due to minimal leakage in the two-stage vacuum pump
Vacuum pump running time less than 3%
The microprocessor controls the vacuum and controls the operation of the vacuum pump
3. Digital GDS generator
A digital spark discharge source based on GDS technology (Gated Discharge Source) allows accurate analysis of both trace components (at < 1 ppm level) and high concentrations (5-40%) of alloying elements in alloys. It includes a digitally adjustable synthesizer to create the initial pulse shape and a power control module to create a real output current applied to the electrode (analytical zone). The ignition circuit is completely solid-state, and the effects of changing the electrical characteristics in it do not affect the stability of the analytical results. Digital control of the excitation source allows you to freely choose the shape of the current curve, which guarantees the optimal selection of the source current level, its duration and the required excitation potential of the spectrum lines. In this case, matrix effects also decrease, since the excitation energy is less dependent on the electrical resistance of the sample. Optimal excitation parameters are selected for each type of metal - iron, copper, aluminum, nickel, zinc, lead and their alloys.
4. Recording electronic module
All recording electronics in OBLF spectrometers are located inside a thermostated vacuum chamber. This allows you to completely eliminate the influence of atmospheric parameters and electromagnetic fields on highly sensitive electronic circuits, thereby increasing the stability of the results.
Standard interface (ESI) between spectrometer and host PC
Has a microprocessor to control all functions of the spectrometer
ADC with dynamic integration
True Integration Module
5. Power supply
All external connections on connectors
Self-diagnosis scheme
High voltage power supply for PMT: stabilization better than 0.2% r.h.
6. Analytical software of the spectrometer
The OBLF concept, which combines the use of proprietary microprocessors for efficient control of individual spectrometer devices and acquisition of analytical signals, with a central control PC and analysis software based on a standard Windows™ platform, is the basis for long-term stable and economical operation of OBLF spectrometers.
