Dendritics D500 Weighing Pan - Design Requirements

Home Up Pouring Dynamics D500 Pan Eval #1 D500 Pan Eval #2 Material Selection D500 Pan Reqs G50 Pan Attempts

(August 1995)

The removable weighing pan for the digital Gemscale-500 was designed to successfully solve a number of problems in an elegant and exemplary manner.  The list was:

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To hold 500 carats or 100 grams of material with a wide range of specific gravity, yet occupy a minimum of vertical height.

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To hold the mass to be weighed in as low as a position as possible to minimize vibrations due to swinging.

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To maximize viewing of single stones and the material to be weighed.

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To provide an ambidextrous ergonomic means of picking up, pouring from and handling the pan.

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To provide an optimum height above the scale or a table top at which finger can most comfortably grip the pan or handle of the pan.

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To provide smooth and controlled pouring of large and tiny gemstones alike.

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To help center single stones and small amounts of stones to minimize off center loading errors.

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To locate and center a calibration weight. ( The angled section on the topside on the present pan assists this function by causing the weight to slip down into position in the base. )

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To be attractive to the eye.

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To have a large top area to facilitate pouring into the pan.

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To be rugged, durable and strong without adding substantial weight to the pan.

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To be designed for anti-static plastics.

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To be manufacturable with a minimum of defects.

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To be designed with consideration of top surface being lightly textured to prevent scratches from being readily apparent, reducing glare and reflections and facilitate controlled pouring.

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The underside of the pan, a flat base area, should make for firm, secure seating when placed on a table top.

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To define a secure seating position on to the sensor's fixed pan.

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To provide some degree of an interaction with the upper housing to help baffle dust, liquids or stones from entering the housing which would corrupt sensor operations.

 

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