How often should I send the 871x in for an instrument calibration?
Generally for a lab environment, Microwave Instruments Division recommends yearly calibration. In a manufacturing or mobile environment, you may want to calibrate it more often; every 4 to 6 months. For a confidence test, you can perform the operator's check as described in the service manual. This test requires very little equipment and takes only a minute or two to perform.
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