units for calibrate tape
olly at survex.com
Tue Aug 31 10:49:07 BST 2004
On Mon, Aug 30, 2004 at 11:08:04AM -0400, Philip Balister wrote:
> Last weekend I used a tape that was missing the first foot. I am trying
> to use the calibrate command to fix this. Do the units of calibrate
> follow the tape units (in my case feet) or are they always meters?
They're the tape units (i.e. the current setting of "*units tape" when the
*calibrate command is processed). Looking at the manual, that's not
clear. I'll fix that - thanks for pointing it out.
A good way to remember how *calibrate works (especially for getting the sign
correct) is to remember you specify the "zero error" - i.e. the reading the
instrument gives when it should read zero. So if a tape is read in feet
and is a foot too short, then when the tape should read zero it actually
Incidentally, do you read in feet with a decimal fraction? Or are you
reading feet + inches and converting externally? It would be easy
enough to add support for feet + inches if it would be useful.
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