WP34S: Reset when printing statistical registers?
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07-03-2014, 10:15 PM
(This post was last modified: 07-04-2014 03:33 AM by pito.)
Post: #24
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RE: WP34S: Reset when printing statistical registers?
(07-03-2014 09:29 AM)walter b Wrote:(07-03-2014 09:24 AM)pito Wrote: Do we measure the battery voltage (BATT) under full load?? Of course YES! When you measure the wp34s current in the key_scanning_mode it takes maybe 150uA current, when you switch to let say 30MHz it takes for example 40mA current. Provided the internal resistance of the CR2032 is 10-1000 ohm (based on its capacity consumed, up to 100ohm at 60% used) you may easily calculate the difference between the measurements.. (done for you - see below for a single CR2032 cell, for 2 in parallel half the Rin). PS: try to measure your car battery after a year of having it resting on the shelf in your garage - you will measure 14V when not loaded happily, but your car will definitely not start |
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