How Often Should Instruments Be Calibrated?

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Using Calibration History Trend Analysis to Adjust Calibration Intervals of Plant Instrumentation

Manufacturing plants need to be absolutely confident that their instrumentation products – temperature sensors, pressure transducers, flow meters and the like – are performing and measuring to specified tolerances. If sensors drift out of their specification range, the consequences can be disastrous for a plant, resulting in costly production downtime, safety issues or possibly leading to batches of inferior quality goods being produced, which then have to be scrapped.

Most process manufacturing plants will have some sort of maintenance plan or schedule in place, which ensures that all instruments used across the site are calibrated at the appropriate times. However, with increasing demands and cost issues being placed on manufacturers these days, the time and resources required to carry out these calibration checks are often scarce. This can sometimes lead to instruments being prioritised for calibration, with those deemed critical enough receiving the required regular checks, but for other sensors that are deemed less critical to production, being calibrated less frequently or not at all.

But plants can improve their efficiencies and reduce costs by using calibration ‘History Trend Analysis’, a function available within Beamex CMX Calibration Software. With this function, the plant can analyze whether it should increase or decrease the calibration frequency for all its instruments.

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•White Paper: How Often Should Instruments Be Calibrated?