Measuring instruments are the ‘heartbeat’ of a company as they check and measure the production processes. They control the quality of products and in the end are responsible for the success and the profitability of a business. A regular check of the measuring instruments with traceable calibration equipment is essential. First, it ensures the product or service quality always matches the customer’s expectations which is vital where ISO 9000 certification is involved. Second, regular calibration pays dividends. Fluke instruments are designed to hold accuracy for one year before recalibration.