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For every organization that relies on electronic test equipment, the cost of instrument calibration is sometimes viewed as an expense that could be easily reduced. Calibration costs—and therefore calibration intervals—are part of a broader discussion that includes tradeoffs between risk and cost, and between quality and customer satisfaction.

Because the instrument manufacturer provides a recommended calibration interval, there may be a feeling that this is an arbitrary time span driven by tradition or other motivations. From our perspective, a well-defined calibration interval is one that balances the tradeoffs between the cost and inconvenience of the process and the need to keep test instruments performing within their specifications. The right cal interval also reduces the risks that come with inaccurate measurements and erroneous pass/fail decisions. Ultimately, our overarching goal is to boost your confidence in two areas: in the results the instruments produce and in the decisions you make based on those results.


Ayscom/eNGN offers three different levels of service during the Standard Service Period to optimize your budget and instrument uptime needs.

Multi-vendor solution
Service plans
Single-event service

Simplify management of calibration and repair service for all your test and measurement instruments—regardless of manufacturer brand—with a custom solution from the industry’s largest OEM global service network.

Standard service center agreements provide fast turn-around at a fixed budget and protect your equipment through its lifecycle.

Single repair or calibration events and auxiliary support and tools to assist self maintained instruments.


 Keysight Calibration

Keysight Cal + Uncertainties

Accredited Calibration

Standards Lab Calibration

Standards1, Primary lab


Measurement guardband

Measurement uncertainties


As received data report1

As received data report2

Calibration certificate


As a practical matter, the pressure to reduce costs may be irresistible. In such cases, Ayscom/eNGN suggests a careful prioritization of which instruments to calibrate at the recommended interval and which to calibrate less often.



As a starting point, it is useful to determine which instruments perform tests that are most critical to the ongoing verification of performance in your products. We suggest that these key instruments be calibrated more often. Any other instruments that are less critical to the quality of your end product are the best candidates for an extended calibration period.



Choose the appropriate calibration, developed by Keysight metrologists who guide standards boards and derive measurement uncertainty calculations.

Avoid the risk of shipping faulty products due to incorrect or incomplete measurements.

Avoid the time lost for a separate repair since adjustments are included.

Rely on the same speed, reliability and accuracy for every calibration at every location as if they were performed by the engineers and metrologists who developed the automated procedures.

Includes cleaning, lubrication and the latest service notes and firmware updates that help reduce equipment failures and out-of-tolerance conditions.