Calibration is the process of verifying that a device operates within its specified accuracy limits by comparing it against a precise, traceable standard.
For power supplies, calibration typically involves two key verifications:
- Output Calibration: Ensuring the actual voltage and current generated match the set values.
- Meter Calibration: Ensuring the values displayed on the front panel or read back remotely match the actual output.
Why is Calibration Necessary?
Over time, electronic components age, and environmental factors such as temperature changes can cause performance to "drift." This drift results in discrepancies between the set value, the displayed value, and the actual output.
If left unchecked, these errors can lead to:
- Reduced reliability of test results
- Inconsistent product quality
- Potential damage to the load or device under test (DUT)
Calibration vs. Adjustment
Strictly speaking, "calibration" refers only to the verification of performance against a standard. If the device is found to be out of tolerance (outside its specifications), adjustment is required to bring it back within limits. While these terms are often used interchangeably, calibration is the act of measurement, while adjustment is the act of correction.
Recommended Interval
To ensure stable performance, we recommend calibrating power supplies at regular intervals. The ideal frequency depends on the operating environment and the criticality of the application, but an annual calibration is a common industry standard.
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