[volt-nuts] Power consumption of 3458A reference board / fittingone in a 3457A
Dr. David Kirkby (Kirkby Microwave Ltd)
drkirkby at kirkbymicrowave.co.uk
Sat Sep 23 16:31:00 EDT 2017
On 24 September 2017 at 08:52, Bill Gold <wpgold3637 at att.net> wrote:
> Your answer to question #1. I have a spare reference board setup to be
> powered up on the bench.
> I measure around 36 ma when it starts cold and then around 30 ma when
> warms up to operating temp. This is at 18 volts.
> Of course this is in an enclosed, insulated box. If the LTZ 1000
> to cool off then the current goes up again.
Thank you. That's interesting. Ignoring the warmup time, which would be a
small fraction of 48 hours, if one assumes 30 mA for 48 hours, that's 1440
mA hr. So 15 x 1.2 V Nickel Metal Hydride AA cells would easily do that,
as they are available up to about 2400 mA hr. It means it is practical put
a 3458A reference board in a box, and ship it to someone else for measuring
whilst keeping is powered up in transit.
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