ringer
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Having just acquired a secondhand Megger 1552 with no calibration cert, I need to attend to this pdq. Can I use a checkbox and record my checks in a log, or do I need to get it officially calibrated before I can do that?
Any advice on type/brand/features of checkboxes, or are they all much of a sameness? There are some for £25 on ebay, are they any good/to be trusted?
Any advice on type/brand/features of checkboxes, or are they all much of a sameness? There are some for £25 on ebay, are they any good/to be trusted?
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