PSA: Check your crane's load cell calibration every 6 months, not yearly

I learned this the hard way last month at a job site near the Port of Seattle. My Liebherr LTM 1050 was showing a 3-ton discrepancy on a pick (you know, the kind where you really need it to be right). Turns out the load cell drifted after 11 months and nobody caught it until we lifted a test weight. Has anyone else had calibration drift faster than the manual says?

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brian_kelly912d ago

Wow, three tons off? That's not a drift, that's a full blown vacation your load cell took without telling anyone. I've had my crane's calibration go wonky after about 9 months of heavy use, and I started doing monthly test lifts with a known weight just to be sure. Your Liebherr probably thought it was helping with the budget by guessing the weight instead of measuring it.