Balance with one or several wire strain gauge weighing cells

US5610343A · kind A · utility

Assignee

• Sartorius AG · DE

Inventors

• Matthias Eger · Wollbrandshausen, DE
• Heinz-Gerhard Kohn · Dransfeld, DE
• Werner Schulze · Göttingen, DE
• Christoph Berg · Oettingen, DE

Key dates

• Filing date: Mar 27, 1996
• Grant date: Mar 11, 1997
• Expiry date: Mar 27, 2016

Classification

• Technology area (CPC G): Physics
• CPC primary: G01L1/2275
• WIPO field: Measurement
• WIPO sector: Instruments

Abstract

It is suggested for a balance with one or several weighing cells (1-4, 31) with a total of at least eight wire strain gauges (D.sub.1 -D.sub.4, S.sub.1 -S.sub.4), four of which (D.sub.1 -D.sub.4) are expanded under load and four (S.sub.1 -S.sub.4) compressed under load, in which the eight wire strain gauges are connected together circularly in series so as to form a single Wheatstone bridge which is supplied with voltage along a diagonal (12, 13) (vertical diagonal) and the output signal is taken off along the other diagonal (14, 15) (horizontal diagonal) that a signal is additionally tapped off along the upper horizontal chord (16, 17) and along the lower horizontal chord (18, 19). This makes possible a corner-load adjustment for the balance utilizing the additional signals.