Weighing scales – Processes
Patent
1996-01-11
1998-09-01
Williams, Hezron E.
Weighing scales
Processes
177 2513, 177 50, 73 113, 436908, 374 14, G01G 900, G01G 1922, G01N 2500
Patent
active
058013377
ABSTRACT:
A method of compensating for load/environment temperature differential-induced measured load weight error comprises the steps of: providing a load having a load temperature T.sub.L ; providing an environment having an environment temperature T.sub.E, different from the load temperature; subjecting the load to the environment at time t.sub.0 ; measuring the weight w.sub.0 of the load at time t.sub.0 ; measuring the weight w.sub.1 of the load at time t.sub.1 ; and calculating the change in weight .DELTA.w.sub.td of the load, between the time t.sub.0 at which the load is subjected to the environment and the time t.sub.2 at which the load and environment temperatures reach equilibrium, induced by the temperature differential between the load and the environment, from the measured load weights w.sub.0 and w.sub.1. The method further comprises the steps of: measuring the weight w.sub.n of the load at time t.sub.n .gtoreq.t.sub.2 ; and subtracting the temperature differential-induced load weight change .DELTA.w.sub.td from the load weight w.sub.n. Also provided is apparatus for determining the binder content of a sample of building material by weighing the sample before combustion, combusting the binder from the balance of the sample, and weighing the sample after combustion.
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Barnstead Thermolyne Corporation
Gibson Randy W.
Williams Hezron E.
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