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Possible problem with freezing the display
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<Neville>
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For certain operations with electronic counters, it is useful to freeze the display, and, where the counter does not have a built-in off switch, I have advocated sliding back the body so as to break electrical contact with the sensor. However, recently when using the Protégé 5 and 9 I have noticed that, when electrical contact is re-established, the revolution display occasionally increments by one. I have never been able to elicit this response from the Protégé 8 and it may never happen with any model if the counter is allowed to fall asleep first.

The fix is obvious: watch the display while re-establishing contact and make a correction if the display increments. Those measurers using the Sigma Sport magnet can avoid the problem by freezing the display in a different way. The magnet is simply twisted on the spoke so that it is furthest from the sensor side.
 
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    Road Course Measurement Bulletin Board    Forums  Hop To Forum Categories  Course Measurement  Hop To Forums  Electronic Measurement    Possible problem with freezing the display