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Photocoupler
High-Precision Spectrophotometer for Measuring Spectral Transmittance
Key words: high-precision spectrophotometer; transmittance; US instrumentation; UV-1100; UV-1800
This advanced UV spectrophotometer system is a fully automated single-beam instrument based on a dual-grating monochromator. It incorporates an integrating sphere in the outgoing optical path to eliminate beam polarization and non-uniformity, while the filter and detector are treated as a unified unit to closely mimic real-world measurement conditions. This design significantly reduces measurement errors and enhances accuracy.
The system’s design and uncertainty analysis are thoroughly discussed. Sources of uncertainty include light source stability, monochromator repeatability, beam uniformity, internal reflection, detector linearity, polarization, and stray light. The measured transmittance uncertainty of the filter is 5.859×10â»Â³, meeting strict precision requirements.
The dual-beam UV spectrophotometer UV-1800 is particularly notable for its ability to measure the absolute spectral response of silicon trap detectors with an uncertainty below 0.035%. This makes it ideal for high-precision radiometric calibration in airborne and spaceborne applications. The system integrates an integrating sphere to ensure uniform illumination and reduce polarization effects, while a lock-in amplifier improves signal-to-noise ratio by amplifying weak signals.
The optical path is designed with a single-beam configuration to simplify alignment and reduce error sources. The dual monochromator, which splits the light into two beams, is optimized for high resolution and low stray light. The system's overall composite uncertainty for spectral transmittance is 5.958×10â»Â³, making it suitable for precise filter radiometer measurements.
The incident and exit optical paths use off-axis parabolic mirrors to avoid aberrations and maintain high efficiency. The integrating sphere ensures uniform light distribution, and the detector is directly coupled to the filter for realistic testing conditions. The system also includes a chopper and lock-in amplifier to enhance signal quality and reduce noise.
In conclusion, this high-precision spectrophotometer offers a comprehensive solution for measuring filter transmittance across a wide wavelength range (380–1000 nm), with a measurement uncertainty of 5.859×10â»Â³. Its design emphasizes practical use, reducing the need for post-processing corrections and ensuring reliable, repeatable results.
Backlight Power Meter Socket
WARNING!
Do not plug two or more meters together!
IMPORTANT
Don't plug in an appliance where the load
exceeds 16 Amp. Always ensure the plug of any appliance is fully
inserted into the meter outlet. If cleaning of the meter is required,
remove from mains power and wipe meter with a dry cloth.
KEYBOARD DEFINITION
1). SET: Set price with button UP.
2). MODE: Exchange display state.
3). UP: Set price combined with button SET.
GENERAL FEATURES
1).Display line power.
2).Display and memory accumulative total power quantity.
3).Display and memory total power charge of price.
THE DATA DISPLAY
Press MODE button the data displays as follows:
W →KWh →PRICE →COST/KWH
↑_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _↓
1). Plug in socket and power on, the meter will display real power.
2). Press MODE button once again and release, the meter will display accumulative KWh.
3). Press MODE button once again and release, the meter will display total power charge.
4). Press MODE button once again and release, the meter will display COST/KWH.
SETTING PRICE OF COST/KWH
1). Press SET button during display COST/KWH,the first digital COST/KWH flash, press UP button to set it.
2). Press SET button once again and release, the second digital COST/KWH flash, press UP button to set it.
3). Press SET button once again and release, the third COST/KWH flash, press UP button to set it.
4). Press SET button once again and release, the fourth COST/KWH flash, press UP button to set it.
5). Press SET button once again and release, the radix point COST/KWH flash, press UP button to set it.
DATA CLEAR
Press and hold MODE button for 5 seconds will clear KWH,PRICE and COST/KWH data.
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NINGBO COWELL ELECTRONICS & TECHNOLOGY CO., LTD , https://www.cowellsockets.com