With accuracies of better than 0.002 % of the applied force, the Morehouse Deadweight Calibrating Machine is the most accurate force standard. It is ideal for those concerned with measurement risk and maintaining a better than 4:1 Test Uncertainty Ratio (TUR) on the force-measuring instruments with a tolerance of 0.05 % or better.
All Morehouse Deadweight Calibrating Machines make full use of the accuracy of deadweights and are true primary standards. This means there are no multipliers (hydraulic or otherwise), levers, or flexures between the weights of the calibrator and the instrument to be calibrated.
Morehouse deadweight machines are capable of calibrating ISO 376 Class 00, ASTM E74 Class AA, AS 2193 Class AA, and other force-measuring devices requiring the utmost accuracy. These include load cells, proving rings, crane scales, force gages, dynamometers, and other force-measuring devices.
Morehouse has redesigned our deadweight calibrating machine to be more rigid, have more room between weights, have conical lifters so low-pressure air bladders can lower the weights to eliminate shock loading, and use new designs to ensure the yoke will not twist apart. The new automated control features a programmable controller where a touch screen is used for manual mode. The end-user can set timing and loading sequences, including data capture, so that all data can easily be exported to your current calibration software, or the machine's USB communication port can be used to work with LabVIEW and other programs.
Deadweight machines start at $70,000.00 USD.
Pricing is often dependent on the size of the machine, cost of calibration of the weights, material of weights, number of weights, engineering costs, and freight. Typical pricing is around $25.00 - $50.00 per lbf for higher-capacity machines. When the accuracy of deadweight is not required, our Morehouse Universal Calibrating Machine, with accuracies of better than 0.02 % of applied, may be an acceptable alternative. The UCM machines of 100K and under range from $20 - $50K, depending on options.
All weights are adjusted to better than 0.002 % of their nominal value. They are calibrated and certified either directly traceable to SI units through an ISO/IEC 17025 accredited lab or directly by the United States National Institute of Standards and Technology (NIST).