Maintenance

Preventative Maintenance Program

Scale inspections performed on a regular schedule are a cost effective way to help identify potential issues which could cause malfunction in the measurement equipment. Weighing Technologies Inc. offers the following preventive maintenance programs:

Truck Scale Calibrations

The following is a summary of the test procedures that Weighing Technologies, Inc. follows when doing a heavy-duty motor truck scale inspection and ISO 17025-2017 calibration service.

  1. First, a visual inspection of the foundation, main weigh structure, deck assembly, mechanical devices, and electronic equipment will be made. Any problems found will be noted on the service report.
  2. Secondly, the actual testing and calibration of the scale will be done in this order.
    • A build up test to 25,000 lbs. will be performed on the scale.
    • A heavy section test with certified weights will be run on each section individually. Adjustments will be made, if necessary.
    • If all sections are within a plus or minus of 1 graduation, the technician will then apply certified test weighs, and make minor adjustments necessary to bring the scale to within tolerances of NIST Handbook 44 standards.
    • Upon completion of the calibration, a certification sticker will be placed on the scale indicator, showing the scale to be accurate and legal for trade.
    • You will also be given a detailed service report outlining all adjustments made and also listing any recommendations felt necessary by the technician to improve the performance and repeatability of your equipment.
Cast Iron Calibration Weights – Grip Handle and Nesting Slab Weights

In-Plant Scale Calibrations

The following is a summary of the procedure that Weighing Technologies, Inc. follows when doing all in-plant inspections.

  1. A visual inspection is made on overall conditions of the scale and surrounding area. Any obvious problems are recorded. Minor adjustments may be made.
  2. NIST traceable certified test weights are applied to all corners or load points of the unit and readings are recorded. The system is checked for accuracy and the tests are repeated so that a level of accuracy can be determined by viewing more than one test.
  3. Any variances in readings will be adjusted to bring the scale up to certified NIST Handbook 44 standards.
  4. If all tolerances are brought to standards, a certification sticker will be placed on the scale showing it to be accurate.
  5. A detailed service report will be made on the scale showing what was done and what recommendations, if any, should be made to improve the repeatability and accuracy of the scale

Please note the above tests will only be made during suitable weather conditions, which insure both testing accuracy and technician’s safety.