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What means zero and span in transmitter callibration.
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Answer Posted / ayub
Zero same meaning with LRV, but Span sometimes not only URV but Span is URV minus LRV, why because sometimes the range of a equipment its start from minus to positive.
eg: Range cal by designer -75 to 77 mmH2O
So, Zero or LRV is -75 mmH2O
But, Span or URV is 150 mmH2O, its come from URV - LRV
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