2015年8月27日星期四

Special Promotion: Afforable 0.001g/1 milligram Laboratory Balance Gold & Jewelry Weighing Scale

Features

1. High precision loadcell.
2. Aluminum Alloy Die Cast Base and mains.
3. Stainless Steel Platter
4. Super Bright LCD Display with Backlight
5. RS232 interface
6. Full capacity subtraction
7. Multi Weighing Unit Conversation g/mg/ct/oz.
8. Below Balance Hanger supplied as Standard.
9. Stabilization time 1.5 seconds
10. Overload Protection
11. Checking Weighing Piece Counting Function


YK-D1003, Weighing capacity 100g, readability 1mg, price $185/unit.
YK-D2003, Weighing capacity 200g, readability 1mg, price $195/unit.
YK-D3003, Weighing capacity 300g, readability 1mg, price $215/unit.

Contact us for more info by email: sales@yk-instrument.com. Our professional sales team will get back to you immediately.

2015年8月26日星期三

Easy Operation Teaching Visible Spectrophotometer



USB RS232 Port

Cuvette Holder

Features

1. Automatically set and calibrate the wavelength.2. USB ports for programming updates and other accessory connection.3. Absorbance, %T and concentration modes.4. The RAM has the capability of saving 200 groups of measured data which can be recalled any time.5. Users can build their own standard curve and save it within the RAM. The curves can be reloaded at any time. Up to 100 curves can be stored.6. Optional software based on windows for VIS 723N, can expand the applications to Standard Curve and Kinetics through the USB port.7. Imported Fiber Converter, which guarantees the high sensibility.8. Advanced Microcontroller. 32 bits ARM 11, the frequency can reach 533MHZ, which ensures the instrument’s stability.9. Sealed monochromator and all the optical mirror surface is coated with Silicon Dioxide, which protect the optical components from the environment.10. The instrument has the ability to test Absorbance, Transmittance and concentration at selected wavelength.11. Optional carousel 8 positions cell holder.

Feel Free to Contact for more Details. 

Email: sales@yk-instrument.com


2015年8月7日星期五

How to choose External or Internal Analytical Balance Calibration



The electronic balances are divided into 2 types: External Calibration and Internal Calibration. 

To ensure the balance adapted to local acceleration of gravity and environment, 
we'd better to calibrate it after installing, moving the balance to another location or the lab temperature fluctuations.

Internal Calibration type is set with an internal motor-driven adjustable weight. 
The balance will be calibrated automatically after we press"Cal" on the keyboard.

While, External Calibration type means calibrate manually. After pressing the "Cal", then you have to place the calibration weight on the weighing pan. Calibration weight must be saved in weight box. But with the more frequency of use, the more loss the external calibration weight then the internal one: dust, acid corrosion and etc. So the weight must also be recalibrated on a regular basis.


Calibration is a procedure intimately associated with analytical balances. Calibration determines the relationship between the displayed value and true mass by comparison with a known mass.  In other words, calibration determines the accuracy of an analytical balance or precision scale.

Considering above, you may choose the internally calibrated balance. While, Externally calibrated balances are generally less costly. 

What do you consider the advantages and disadvantages of automatic and manual calibration to be? What are analytical balances used for in your operation?



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