OHAUS Defender Series Service Manual

Also see for DEFENDER SERIES: Assembly instructions Instruction manual Instruction manual Instruction manual User guide

Contents

OHAUS Defender Series Service Manual Manual pdf 27 page image

26 Defender™ Series Bases Service ManualAPPENDIX A. GLOSSARYOhaus Load Cells contain a specification label on the Load Cell itself.Compensated Temperature RangeThe range of temperatures over which the output from the cell is compensated. If used outside thisrange the output cannot be guaranteed to follow the specifications.Environmental ProtectionIP rating against moisture and dust, for example, IP 65.ExcitationVoltage applied to the Exe+ and Exe– leads of the load cell.Input ResistanceThe resistance measured across Exe+ and Exe– with load cell disconnected andno load.Insulation ResistanceNormally measured at 50 V dc, this is the minimal resistance between the metal body of the load celland any of its electrical connections.Mechanical FailureThe load at which the cell is likely to fail mechanically, that is, break or deform.mV/VUsually the output from a load cell will be approximately 0m V at zero load, though typically there maybe a small offset voltage at zero load. Over the full rated capacity of the load cell, the mV output willchange. The amount by which it changes depends upon the resistance change in the cell and on theexcitation voltage applied. Since the load cell manufacturer does not know what excitation voltage willbe applied to the cell, rather than quote the V output over full range, they will quote the milli-Volt outputper volt of excitation, or in its short form, mv/V. Most Ohaus Indicators provide an excitation voltage of5 Volts dc.Output ResistanceThe resistance measured across S+ plus and S– with load cell disconnected andno load.Overload CapacityThe maximum load that can be applied without permanent damage. Loads in excess of maximumcapacity will cause damage to the load cell.Rated CapacityThe maximum load over which the load cell will operate within its specifications.Rated OutputThe nominal mV/V output of the load cell.Ultimate CapacityThis is a percentage setting, usually 300% of full capacity.Zero BalanceThe output of the load cell at no load, normally quoted as a percentage of full load. Also known aszero offset.

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