On 8-3-2018 9:25, Stephen wrote:
> On 08/03/2018 07:54, Thomas de Groot wrote:
>> On 7-3-2018 22:44, Stephen wrote:
> 
>>> Drillers use some strange terms. The anchor chain tension is measured 
>>> in Kilo-pound-inches. I had never heard of that measurement before I 
>>> had to calibrate the load sensors.
>>>
>>
>> Interesting story. "kilo-pound-inches", could that mean 'thousand 
>> pounds per inch'? the word kilo being used for the thousand's value?
>>
> 
> Yes kilo is a multiplier and since it is a unit of work it should have 
> been KIP, kilo inch pounds which is 112.98 Nm.
> I got kpi stuck in my head. :-)
> 
> For something so important the transmitter was a simple op amp. Check 
> the zero and span against the supplied load cell manufacturers data 
> sheet. Easy peasy. :-)
> 

Easy peasy indeed. I imagine the guys calibrating those data sheets: 
"Hey John! Lets give it a pound more!"  BANG!  ;-)

I am always surprised that we got to the Moon at all, or Mars for that 
matter, where we were able to crash at least once because of 
imperial/metrics confusion... ;-)

-- 
Thomas

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