Xenon lamp use common sense
Xenon lamps mainly rely on plasma discharge. Xenon lamps are light sources for use in the ultraviolet band. The actual effective wavelength range is 185nm-400nm, which is a continuous spectrum band.
The normal service life of the xenon lamp
Xenon lamp is a consumable part. At present, the Xenon lamp on the market is roughly divided into standard xenon lamp (1000h warranty) and long-life xenon lamp (2000h). As an innovative technology, the long-life xenon lamp is significantly improved. The service life of the xenon lamp can reduce the maintenance of the instrument for the user, but the price is higher. Under normal circumstances, the black light at the illuminating hole of the xenon lamp should consider whether the service life of the xenon lamp has expired. The energy decay of a xenon lamp during normal use is a very slow process. When the life of the xenon lamp is approaching, the intensity of the light it emits decays quickly until it does not illuminate. If the lighting fails all the time, it means you can consider changing the lights.
The energy reduction of the xenon lamp mainly depends on the following three factors: (1) evaporation of the internal metal coating of the xenon lamp; (2) the filament metal coating of the xenon lamp reacts with the quartz sleeve (mainly hinders penetration); 3) The purity of the filled helium gas changes.
The main reason for the shortening of the service life of the xenon lamp or even the early failure (1) The switching frequency of the xenon lamp: The number of times the xenon lamp is switched is inversely proportional to its normal use time. Frequent switching of the xenon lamp will cause damage to the life of the xenon lamp and may be related to production efficiency. The effect is due to the stabilization time of about 30 minutes after the xenon lamp is lit; (2) the glass casing of the xenon lamp is contaminated: do not touch the xenon lamp directly with your hand. The oily substances contained in the hands will leave any residue on the glass jacket, which will hinder the penetration of light. (3) Physical collision: When the xenon lamp or detector is physically impacted, especially when the lamp is working, the filament is very likely damage. (When the xenon lamp is lit, the filament temperature is 2700 degrees, and the filament is almost liquid.) When the xenon lamp is just turned off, wait for it to cool before turning it on again. Since the xenon lamp is turned on when it is not cooled, it is likely to cause damage to the entire structure of the filament.
The signal of the replaceable xenon lamp (1) cannot be lit or the purple-blue light is visible on the edge of the lamp's outer casing (visible to the naked eye); (2) the quartz coat is blackened (check and replace when the lamp is off and cooled); (3) ) The non-linear phenomenon that has never occurred before in the analysis method (the absorption rate of light is not linear); (4) the baseline drift is severe under normal settings; (5) there is no peak during normal injection.
Safety protection measures when using Xenon lamp <br>If you are exposed to ultraviolet light emitted by Xenon lamp during use, it is recommended to wear UV goggles because high energy and low wavelength UV light will cause damage to the naked eye. Great damage.
The reason why the xenon lamp is noisy
In the course of the experiment, we will encounter the user's reaction, the xenon lamp is noisy, but we can't determine which side has a problem. This situation has the following reasons, which may cause the xenon lamp to be noisy. Share it with you:
1. Whether the xenon lamp has reached the end of its service life, the xenon lamp energy is reduced, and the requirements are not met.
2. Whether the flow cell or flow cell window is clean, even rare pollutants can cause noise. (The flow cell becomes dirty and the energy of the xenon lamp is also related)
3. Is it just prepared ultrapure water?
4. Is the mobile phase degassed well?
5. Is there a bubble in the system?
6. Determine if the front pressure of the column is stable and see if the mobile phase is used correctly.
7. It takes a long time for the column to be used (possibly the column packing is collapsed, lost, or blocked), preferably without the column.
8. Is the related signal circuit abnormal, causing this phenomenon?
9. Is there a bubble in the detector?
Disclaimer:
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Pressure Compensated Emitter Products
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