September 2010Maintenance, Test & Measurement, Calibration
The latest generation of Instrotech’s locally designed and manufactured Calog strain gauge loadcell tester/calibrator includes loadcell indication and datalogging via the USB port or SD cards.
Users no longer need to remove loadcells from the weighing scale to send back to the supplier for testing, they can simply connect one at a time to the calibrator to get a readout of the status of the cell wiring and gauges. If a loadcell has been overloaded, the zero balance will be out. If the cell has water penetration, this will be indicated via the insulation test when connecting additional leads to the screen and housing. The recommended 50 V is used to measure the insulation in M, displayed onscreen with low readings highlighted.
The loadcell test automatically checks whether the wiring is four or six wire and that all connections are sound. A three or five wire connection would indicate a fault condition. The test then powers up the loadcell and measures the no-load mV to read the bridge balance. It then connects the strain gauge bridge in turn from input, output and balance measuring resistance in each case. The test takes less than 10 seconds and gives a summary on the backlit graphic LCD.
The unit is supplied with a comprehensive operating manual and the calibrator includes a help menu to show users how to connect the unit for the various applications.
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