Or drag out the old 5,000ohm/v VOM (the OM-1 of meters), which will load
it down nicely and give a good reading. Active circuitry isn't always
best. Also, since a VOM is probably no more accurate than +- 5%, and
can't be read to 3 or 4 decimal places, it's harder to obsess about
5/100 of a volt that doesn't mean anything in this context anyway.
Moose
Joe Gwinn wrote:
Be careful. Voltmeters don't load the battery enough to bring many battery
types down to the operating voltage range. You'll get a more accurate
measurement if you measure the voltage across a 10,000-ohm resistor connected
to the battery. This will draw 135 microamps if the battery voltage is 1.35
volts under this load. By contrast, cheap voltmeters are often 1 megohm,
expensive voltmeters are 10 megohm, and both draw far too little current.
< This message was delivered via the Olympus Mailing List >
< For questions, mailto:owner-olympus@xxxxxxxxxxxxxxx >
< Web Page: http://Zuiko.sls.bc.ca/swright/olympuslist.html >
|