Watch the A&D GF1603A Apollo milligram balance in action and how how Electronically Controlled Load (ECL) works in both a stable and unstable environment.

In the stable environment (without air movements) the standard deviation (S.D. or repeatability) is 0.32mg & the minimum weight (MW) is calculated at 0.820 grams. Watch the balance's display when a load greater than 820 milligrams is applied to the weighing platform. Then notice when a weight below 820mg is applied to the weighing platform and how the display alerts the operator with the GF1603A display blinking "MIN".

Now for the unstable environment a fan is used to creative air turbulence. In the drafty environment now the S.D. is 3.16mg and the MW is 6.320 grams.

Electronically Controlled Load (ECL) Initially does a self-diagnostic before
performing an internal repeatability test without an external weight in less than 1.5 minutes.
• Dia-Check is the diagnostic result that validates if the balance critically passes or fails.
• SD is standard deviation that allows for daily precision check ideal for S.O.P’s
• QuickMin-S determines minimum sample weight in any given environment.
• Min-S Alert – Alerts user to ensures they are operating within USP41 compliance.

ECL, which stands for Electronically Controlled Load, is A&D's unique technology (patent pending) of generating a minute load (0.3 to 3% of the balance capacity) by purposely altering the equilibrium state of the electromagnetic force restoration sensor. A balance with this technology, such as the A&D Weighing GX-A/GF-A series, allows the user to test its repeatability performance without using an external weight by automatically calculating the standard deviation from 10 repeated measurements with the said artificially generated load.

While the principle of load sensing is exactly the same for ECL and an external weight, users may question the validity of the minimum weight produced by the former, as it is difficult to argue that ECL is the same as the "test weight" in the USP terms. They may also point to the fact that with ECL the influence of the operator skill on repeatability isn't taken into account.

Precision Weighing Balances is an Authorized A&D Weighing Dealer and you can see the full line of laboratory balances at www.scaleman.com and A&D balances and accessories can be found at https://scaleman.com/and.html

Be sure to review the

GX-224A Analytical Balance at https://scaleman.com/gx-224a-analytic...

GF-1603A Milligram Balance at https://scaleman.com/and-gf-1603a-hig...

GX-4002A Precision Balance at https://scaleman.com/and-weighing-gx4...

GX-6001A High Capacity Balance at https://scaleman.com/gx6001a-0-1-gram...

You can see the entire Apollo GX-A/GF-A Laboratory Balances at https://scaleman.com/catalogsearch/re...