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WP34S: Reset when printing statistical registers?
07-03-2014, 10:15 PM (This post was last modified: 07-04-2014 03:33 AM by pito.)
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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??
When not, the BATT does not show the proper numbers..

Do you want to switch the WP 34S to full load just for measuring the voltage by BATT?


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 Smile

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RE: WP34S: Reset when printing statistical registers? - pito - 07-03-2014 10:15 PM

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