How do you verify a tape measure against a known length?

Maintenance & Repair
Accuracy

Two tapes on a crew that disagree by a sixteenth produce work that does not fit, and neither one announces which is wrong. The REEKON Accuracy Block gives a fixed standard for the hook, and a known length in the shop settles the reading itself. Once every tape returns the same number against the same reference, the crew is measuring to one standard rather than several.

The two checks, in order

First the hook, against the Accuracy Block
Then the reading, against a known length
Two tapes that disagree both look right
Every tape checked to one reference
The crew measures to one standard

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Two checks, in order. First the hook: seat it in the Accuracy Block and confirm zero error at the two inch mark. Then the reading itself. Measure something whose length you already know, like a welding table at 45 and 31/32 inches, and confirm every tape in the shop returns the same number.