During calibration data loggers are compared to a reference meter that has been calibrated in a UKAS (United Kingdom Accreditation Service) approved laboratory. During calibration the logger is compared to a reference meter: the certificate lists the value recorded by the reference meter (the points at which the data logger was tested), the value recorded by the data logger and the error between the two readings. In addition to the reading information, calibration certificates also list the test method and the details of the equipment used to provide traceability back to national standards.

Calibration certificates do not have a period of validity; they are simply a statement of what the unit was reading when it was tested. That said, unless the application is particularly critical or demanding, most people get their loggers calibrated annually.

Even if you don't purchase calibration certificates, we guarantee that our loggers will meet the accuracy figures specified on our datasheets at the point of purchase.

Calibration Points

For Energy Loggers, our calibration points cover a range of currents from 10 to 1,000A per-phase in both the single and three phase modes of operation. Voltage, power and power factor readings are also tested.