E-07-The New Benchmark of Power Supply- ELITE U Series

INTRODUCTION

Adaptable with universal power source, ELITE U series power supply also provides high accuracy power output and long time stability as ELITE series. Along with wide range applications, Wealtec ELITE U displayed the actual voltage and current output of running power supply, as follows, to prove the accuracy and stability of ELITE U power supply family. As testing with full range setting for accuracy and stability, Wealtec proudly claims the ELITE and ELITE U series as the new benchmark of power source for every laboratory.

EQUIPMENTS

• ELITE 200U x1; ELITE 300U x1; ELITE 600U x1 (Wealtec)
• True RMS Multi-meter (Fluke)
• Series of Cement resistors

METHOD

1. Apply power supply with cement resisters as in figure 1 (A) when testing with voltage output, and as in figure 1 (B) when testing the current output.
2. Get the mean value with three tests.
3. Calculate the DV value by following formula.

RESULTS

Table 3. Deviation and accurancy of ELITE U power supplies

Figure 4. 4 hours stability of ELITE 200U, 300U and 600U.

DISSCUSION

ELITE U series not only remains the high accuracy and stability features of the ELITE series power supply, but also provides higher setting resolution and better controlling mechanism. As shown in table 1 and 2, both theoretical value and practical value are closely related to each other in both current and voltage setting. As evaluating with the true values, in full range voltage setting, the deviation between setting value and actual output were all less than 1% in whole ELITE U series of power supply as in table 1. The deviations of current were all less than 2% as listed in table 2. ELITE U power supplies guarantee having excellent accuracy in every model. It’s critical to have full range setting under 1% and 2% deviation especially under the minimum setting.

Besides, ELITE U series also have very good stability within 4 hours operation. As in figure 4, different outputs of these units were stay within the 1% voltage or 2% current differences. Especially for the blotting or transfer procedure in Western Blot, it’s highly recommended to use of the accurate and stable ELITE U power supply. It provides excellent transfer quality specifically transferred with a very stable low current. In stability test with 1 A and 2 A in ELITE 300U, the cement resistor got very hot (around 200oC) after an hour operation, and the resistance became higher and lower down the current output. As the result that the deviation become higher but still been controlled lower than 2%.

Applying with PWM technique, the entire ELITE series are designed with high stability and high accuracy no matter running under constant current or voltage. For the power supply selections, all models can be used for working with one unit of semidry or wet transfer blotter. If it’s requested to apply with two transfer units, ELITE 600U would be the best choice. With the semidry fast transfer system, the ELITE 200U with high maximum 2A current is the only and best choice. ELITE U series power can be applied to broad applications, every laboratory is recommended to have more than one unit to meet different needs. Yi-Ta, Ch

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