QSN 750-II

Our QSN 750-II model is a spark emission spectrometer that can be used as a single- or multi-matrix system thanks to its 750 mm vacuum optics. This results in a broad field of application, which not only covers the entire range of metal producing and processing enterprises, but also includes a large spectrum of options for material testers and testing institutes. Both the integration system and the photomultipliers, which are arranged in accordance with customer specifications, are housed inside the optics and are therefore protected against external influences. The temperature-stabilised optics and the Gated Digital Source (GDS) technology guarantee a high degree of signal reproducibility and thus analytical constancy. The easy-to-reach self-cleaning and patented spark stand and aperture window enable problem-free maintenance by the user. An exhaust filter ensures the consumed argon is purged.

Benefits

multi matrix applications
up to 64 PMT element channels
GDS III spark genetator
vacuum system
self-cleaning spark stand
suitable for automated systems
double electrode system as option
automatic electrode cleaning as option

More Infos

In contrast to its GS 1000-II “little brother”, the QSN 750-II can also be used within automated production environments. In such cases, the spectrometer is combined with a sample-preparation device and a sample-handling robot to form a single unit, which naturally also ensures automatic cleaning of the counter-electrode. The analysis results are transferred online to the superordinate computer system using a network connection. In order to guarantee optimum quality control, the spectrometer initiates any necessary control sample readings at certain time intervals, whereby the robot is again responsible for sample handing. With the help of previously defined limiting values, the spectrometer automatically monitors control samples. Key system functions are permanently monitored and if necessary this information is transmitted to other systems.

A large number of analysis programs can arise especially when using multi-matrix systems to perform extensive analytical tasks. For this reason, the matching spectrometer software, OBLFwin, provides numerous individual programming options to perfectly suit user requirements. In addition, the automatic program selection option simplifies assignment of the right analysis program. Depending on the application, the measured values appear on screen approx. 16-30 seconds after the start of the measuring process and can then be printed out, transferred within the network or evaluated later.

Precise instructions on how to operate the QSN 750-II model and use the software are naturally given during installation. The customer only has to ensure availability of a power and an argon supply.

Technical Data

Optics

spectrometer in Paschen-Runge mounting
Rowland circle diameter 750 mm
wavelength range 110-770 nm
optics and read-out electronics temperature stabilised to ± 0.1°C for excellent long-term stability
automatic computer controlled profiling
coma corrected slits
PMT types selected according to the respective wavelength
shock resistance

Vacuum System

evacuated light metal chamber
maintenance free 2-stage rotary vane pump
vacuum pump integrated in cabinet
pump duty cycle <5%
oil diffusion protection
automatic pressure regulation and stabilisation

Spark Generator

Gated Digital Source (GDS) with integrated multi-spark system
maintenance free
spark frequency up to 1 kHz
unipolar medium voltage discharge
separate parameter for pre-sparking and integration selectable
variable excitation parameters & discharge characteristics selectable by software
Ignition voltage 20kV

Spark Stand

Argon purged spark stand, optimised for low Ar consumption
patented self-cleaning
open sample stand for easy handling
low-wear top plate with 12 mm opening
optionally adapters for small parts and wires are available
low-wear tungsten electrode
pneumatic sample clamp for rapid sample handling
automatic electrode cleaning as option
About 3 l Argon consumption per measurement
easy maintenance

Electronics

stabilised PMT high voltage supply
dynamic 16 bit AD conversion for each channel
DSP Processor controlled
USB interface to spectrometer PC

Dimensions & Weight

width 104 cm
height 130 cm
depth 90 cm
weight about 460 kg

Power Supply

230V; 50/60 Hz; 1,5 kVA
500 W in stand-by mode

Environmental Conditions

operation temperature 10 – 40 ºC

Computer-Hardware

standard computer system
MS Windows® 7 operating system with custom specific regional and language settings

Software

OBLFwin spectrometer program
easy routine operation
freely configurable sample IDs
automatic repeatability control for measurements
automatic averaging
warning signal if calibration is exceeded
bad sample detection including dynamic measurement control (option)
as many analysis programs to customer specifications as required
individual analysis parameters for each program
multivariate calibration model (incl. line overlaps and matrix effects)
easy and simultaneous recalibration of a complete matrix
automatic program selection
type calibration and type measurement
spectrometer control sample measurements
average and standard deviation from chosen measurements
automatic reminder of regular recalibration
grade control by comparison with grade database settings
automatic display of of selected grade or material number
freely editable grade database
printout of certificates
analysis database
several statistical functions as display of control charts
automatic analysis data export
system check preceding each analyse
System diagnostics module
software supported maintenance tasks, for example entrance window cleaning