AND Apollo GF-A [GF-303AN] Multi-Functional Precision Balance with External Calibration & NTEP-Approved, 320g x 0.001g - 128mm x 128mm. With the A&D Weighing GF-303AN Precision Balance the operator simply holds the mode key to first perform a self diagnostic check and proceed to ECL where internally a repeatability test is performed without use of an external weight. This critically checks the stability of analog-to-digital conversion before applying a controlled load inside the balance (between 0.3% to 3% of the weighing capacity). It does this by altering the equilibrium state of the weigh sensor and takes 10 repeated measurements. The entire process takes only 1.5 minutes versus traditional repeatability procedures which can take up to 10 minutes, ultimately giving greater convenience and time savings to customers. The ECL technology provides valuable information which Auto Precision Assessment (APA) smartly processes into meaningful, beneficial outcomes such as Dia-Check, Standard Deviation, Quick Min-S, and Min-S-Alert. Dia-Check quickly gives users peace of mind to proceed with daily weighing routines, providing a critical pass or fail indication. A powerful, dynamic tool to diagnose, and verify balance performance. ECL steps it up a notch by producing the most valuable information, the Standard Deviation (SD), allowing users to quickly assess the balance performance under any given environment. This is helpful to include in daily SOP checks. SD also can determine the minimum sample weight with a feature called QuickMin-S. QuickMin-S helps to overcome challenges with handling small weights, accessibility to in-line systems, and in tough environmental conditions. ECL goes one step further allowing users to set the minimum sample weight limit and provides a real time alert with Min-S-Alert. Users always feel secure knowing they are in compliance of USP 41 and does not limit how often a minimum sample weight can be determined. This gives more flexibility to follow recommendations of USP 1251. What is so remarkable is this can be performed at the touch of a button, within minutes, in challenging conditions, without the need of an external calibration weight.