Photoelectric direct reading spectrometer

Application, performance and description of photoelectric direct reading spectrometer
1. Application scope: Spark direct reading spectrometer is a rapid quantitative analysis instrument for analyzing the composition of ferrous and non-ferrous metals. This instrument is widely used in metallurgy, machinery, and other industrial sectors for online analysis before smelting furnaces and product inspection in central laboratories. It is one of the effective means to control product quality. Can accurately detect the composition of chemical elements in metal materials; Can accurately quantify a wide range of elements such as iron-based, aluminum based, copper based, nickel based, etc!
2. Analysis of matrix number: Composition measurement of various matrix alloys such as Fe and Al can be configured
3. Element determination: It can simultaneously and quickly determine the elements in solid metal samples C、Si、Mn、P、S、Cr、Ni、Mo、V、Ti、Cu、Al、W、Co、Nb、Mg、La、Ce、B、Pb、Sn、As、Sb、Bi Users can choose the element configuration according to their actual needs, including various metal, non-metal, and gas elements (see Attachment 2 for details).
4. Analysis principle: The tested sample is excited by a high-energy pre ignition spark light source to generate characteristic emission spectra of each analyzed element, which are then received by a photoelectric conversion element; Subsequently, detection and measurement are carried out, and data processing is performed using a computer to obtain the corresponding analytical content. Sample size analysis: The standard is any machining plane with a diameter greater than 20 millimeters, and customized small sample fixtures can be selected for small sample analysis.
5. Analysis time: Depending on the type of sample, generally less than 40 seconds

Components of photoelectric direct reading spectrometer:

1. Excitation light source 2, spectroscopic system 3, measurement control unit (MC) 4, vacuum system
5. Computer 6, argon controlled atmosphere 7, slit scanning

Excitation light source for photoelectric direct reading spectrometer:

Supply voltage: 50Hz 200V ± 1%
Input power: 1.0Kva
Charging capacitor: Pre burned at 6 μ F and exposed at 1.5 μ F
Peak current: Pre burning 120A, exposure 30A
Main peak voltage: 300VDC (using automatic peak voltage adjustment)
Ignition circuit: pulse amplitude+15kV
Auxiliary gap adopts tunnel diode
Discharge frequency 400Hz (optional 150-500Hz)
Sample stage analysis gap: 4mm

Photoelectric direct reading spectrometer spectroscopic system:
Analysis band range: 160-450mm
光栅：曲率半径750mm
Engraving density: 2400 lines/mm
Engraving area: 30 * 50mm ²
Sparkling wavelength (first level): 300nm
Linear dispersion: 0.55nm/mm
Incident slit width: 20 μ m
Exit slit width: 50 μ m, 75 μ m
Allow maximum multi-channel: 31
Local constant temperature of spectrometer: 35 ℃± 0.5 ℃

Measurement and control system of photoelectric direct reading spectrometer
Measurement and control system: using a single board computer for measurement and control, and exchanging data with the upper computer
Measurement method: segmented integration
Integral capacitance: 0.047 μ F or 0.1 μ F

High voltage power supply for photomultiplier tube:
1. Stability: When there is a change in the load, the output change is less than 0.005%, and when there is a 20% change in the line, the output change is less than 0.003%;
2. High voltage regulation: varies from -550V to -1000V, divided into 8 levels of adjustment, with each level adjusted to 70V;
3. High voltage setting: Users can change it through computer software.