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Rifles, Reloading, Optics, Equipment
Reloading
Duplicate Chronograph results
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<blockquote data-quote="wallypedal" data-source="post: 708583" data-attributes="member: 7107"><p>I read all this thread and never saw real resolution to the OP's question. Just yesterday I wrote to and received replies from Competition Electronics which made sense. I was asking why I got identical numbers displayed (like 3122 but never a 3123) and why I got the "duplicate" reading semi-frequently. Rather than put my twist on it, here is the quote from Jim at CE:</p><p>********************************</p><p>"Depending upon what velocity you are measuring, there is a "gap" between displayed readings. Above 1,500FPS the unit will begin incrementing by 2FPS.</p><p></p><p>The "gap" between velocity readings increases with speed. For instance, at 3,000FPS the chronograph has a gap of 6-7FPS for each count of the internal clock. So if you are getting duplicates at 3,000FPS <strong>then your loads are likely within +/- 7FPS of each other</strong>. Part of this is due to "rounding of the internal calculations. This translates to about a maximum of .2% error which is part of our 1% accuracy spec."</p><p>********************************</p><p>I put into bold the eye-opener for me.lightbulb A dup message and reading are within a tolerance range. It also means to me that ES and SD numbers are only within a range as well, so strings should be long if the ES and SD are to be meaningful.</p><p>I chased shooting forums looking for similar posts, and never saw this information displayed! Hope it helps somebody before they loose all their hair over it....too late for me!<img src="data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7" class="smilie smilie--sprite smilie--sprite1" alt=":)" title="Smile :)" loading="lazy" data-shortname=":)" /></p></blockquote><p></p>
[QUOTE="wallypedal, post: 708583, member: 7107"] I read all this thread and never saw real resolution to the OP's question. Just yesterday I wrote to and received replies from Competition Electronics which made sense. I was asking why I got identical numbers displayed (like 3122 but never a 3123) and why I got the "duplicate" reading semi-frequently. Rather than put my twist on it, here is the quote from Jim at CE: ******************************** "Depending upon what velocity you are measuring, there is a "gap" between displayed readings. Above 1,500FPS the unit will begin incrementing by 2FPS. The "gap" between velocity readings increases with speed. For instance, at 3,000FPS the chronograph has a gap of 6-7FPS for each count of the internal clock. So if you are getting duplicates at 3,000FPS [B]then your loads are likely within +/- 7FPS of each other[/B]. Part of this is due to "rounding of the internal calculations. This translates to about a maximum of .2% error which is part of our 1% accuracy spec." ******************************** I put into bold the eye-opener for me.lightbulb A dup message and reading are within a tolerance range. It also means to me that ES and SD numbers are only within a range as well, so strings should be long if the ES and SD are to be meaningful. I chased shooting forums looking for similar posts, and never saw this information displayed! Hope it helps somebody before they loose all their hair over it....too late for me!:) [/QUOTE]
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Duplicate Chronograph results
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