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TOPIC: TruPulse 360 horizontal angle measurer
http://groups.google.com/group/entstrees/browse_thread/thread/f490a9205bce72c1?hl=en
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== 1 of 1 ==
Date: Fri, Oct 19 2007 2:12 pm
ENTS,
Being presently house ridden, I'm unable to get out and measure
trees. So several hours ago, I decided I would continue with
TruPulse 360 testing with the objects surrounding me in my basement
space. I decided that testing the accuracy of the TruPulse 360's
horizontal measurer was feasible as an indoor experiment. I chose
objects like picture frames, doors, windows, bookcases, chairs, etc.
I then hobbled over with my tape measure and got the taped width of
the selected objects. Next, I then shot the width of each object
using the TruPulse 360's ML (missing line) routine. The following
table shows the results.
| Object |
Taped |
TruPulse |
Diff |
Abs
Diff |
| Chest |
4.0 |
3.8 |
0.2 |
0.2 |
| Window |
3.1 |
3.0 |
0.1 |
0.1 |
| Door
frame |
3.6 |
3.5 |
0.1 |
0.1 |
| Bookcase |
2.7 |
2.4 |
0.3 |
0.3 |
| Picture |
1.5 |
1.6 |
-0.1 |
0.1 |
| Chair |
1.8 |
1.7 |
0.1 |
0.1 |
| Credenza |
5.8 |
5.7 |
0.1 |
0.1 |
| TV |
2.8 |
2.7 |
0.1 |
0.1 |
| Picture |
1.8 |
1.6 |
0.2 |
0.2 |
| Double
Window |
5.9 |
5.9 |
0.0 |
0.0 |
| Avg
Abs Diff |
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0.1 |
Folks, this is one sweet instrument. I couldn't possibly be more
pleased. Average accuracy for horizontal distances of 0.1 feet is
far beyond my wildest expectations. My TruPulse is much more
accurate than the one that Laser Technology loaned to me for
testing.
There will be many more tests, but at this point, the instrument
passes with flying colors. Oh yes, I got the above numbers after I
went through a calibration routine. Periodic calibration is probably
essential.
Bob
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