Overview
YUE FENG Model 755 UV-Visible Spectrophotometer is a powerful analytical instrument that uses imported tungsten lamps and deuterium lamps as light sources, with a service life of up to 2000 hours, and is equipped with a large sample chamber, which can accommodate Colorimetric dishes from 5mm to 100mm. The instrument supports one-button automatic correction of ABS values, and has an RS232 data output port, which can be connected to computers and printers.
Features
1. Automatic correction of ABS value with one click.
2. Four-digit LCD liquid crystal display, digital display of measurement values.
3. Adopt imported tungsten lamps and deuterium lamps, with a service life of up to 2000 hours.
4. Equipped with a wide sample chamber, 5mm~ 100mm Colorimetric dish can be placed.
5. With RS232 data output port, can connect computers and printers.
6. Support the establishment of standard modes C = FXABS, F = C/ABS.
7. You can directly connect the printer (optional) to print data or maps.
Principle
The instrument works based on the principle of ultraviolet-visible Spectrophotometric method, spectra-trophotometry. The composite light emitted by the light source is separated by a monochromator (aberration grating) and becomes monochromatic light of a specific wavelength. When the monochromatic light passes through the sample solution, the substance to be tested selectively absorbs it, and the transmitted light signal is received by the Detector and converted into an electrical signal. After processing, it is displayed in the form of Absorbance (ABS) or light transmitance (% T), and the sample concentration can be calculated according to the standard Linear dispersion (C = FXABS mode).
Applications
Chemical analysis, biological testing, environment monitoring, pharmaceutical industry, food inspection, teaching and research
Standards
The data did not mention specific compliance criteria
Steps
1. Turn it on and warm up.
2. Select Measurement mode (e.g. ABS file).
3. Use a blank solution to zero the background.
4. Absorbance (ABS) measurement of known standard solutions.
5. Calculate the F value (F = C/ABS).
6. Under F, adjust the F value to the calculated value (F value range: 1-1999).
7. Switch to C file, measurement of unknown samples, directly read the concentration value.
8. Data output can be connected to a computer or printer through the RS232 port.
Notice
The instrument should be placed on a stable, vibration-free workbench protected from direct sunlight.
* Please make sure that the instrument is fully preheated before use to ensure measurement Stability.
* Colorimetric dish surface should be kept clean, use to avoid direct contact with hands.
* When measuring different samples, use the corresponding blank solution to re-zero.
* Deuterium lamps and tungsten lamps are consumables and need to be replaced in time after reaching the end of their service life.
When connecting external devices (e.g. printers, computers), ensure that the interfaces match and the communication parameters are set correctly.
Periodically calibrate and maintain instruments to ensure measurement Precision.
