Electronic balance

An electronic balance comprising:

• a weighing means for producing digital output signals as a measured value in response to a force induced upon a tray when an object to be weighed is placed thereon;
• an input unit for inputting the masses of reference weights;
• a writing means for transcribing data from said input unit onto a first memory as reference values;
• a discriminator for signalizing the existence and non-existence of said object on said tray;
• a second memory for storing a corrected value obtained by differentiating between each of measured values of said reference weights and the masses thereof stored in said first memory when said discriminator signalizes that no object is placed on said tray;
• an arithmetic unit for correcting a measured value signalized by said weighing means in accordance with said corrected value stored in said second memory when said discriminator signalizes that an object is placed on said tray;
• and
• an output unit for outputting said arithmetic results obtained by said arithmetic unit.

An electronic balance comprising:

• a weighing means for producing digital output signals as a measured value in response to a force included upon a tray when an object to be weighed is placed thereon;
• a plurality of loaded reference weights whose masses are known, said reference weights being carried by a support integral with said tray such that a positive or negative addition of their masses can be made;
• a memory for storing data with respect to the masses of said reference weights, said data being stored correspondingly to each of said reference weights;
• an input unit for transcribing said data onto said memory;
• an arithmetic unit for obtaining a measured value on the basis of a positive or negative addition of said reference weights and said data stored in said memory;
• and
• an output unit for outputting said arithmetic results obtained by said arithmetic unit.

An electronic balance comprising:

• a weighing means for producing digital output signals as a measured value in response to a force induced upon a tray when an object to be weighed is placed thereon;
• a single loaded reference weight whose mass is known, said reference weight being carried by a support integral with said tray such that a positive or negative addition of said mass can be made;
• a first memory for storing said mass of said reference weight as a reference value;
• a discriminator for signalizing the existence and non-existence of said object on said tray;
• a signal generator for intermittently instructing a positive or negative addition of said single reference weight;
• a second memory for storing a corrected value obtained by differentiating between a measured value of said reference weight and said mass stored in said first memory when said discriminator signalizes that an object is placed on said tray and when said signal generator signalizes a positive or negative addition of said reference weight;
• an arithmetic unit for correcting a measured value signalized by said weighing means in accordance with said corrected value stored in said second memory;
• and
• an output unit for outputting arithmetic results obtained by said arithmetic unit.