[volt-nuts] Fluke 335A

[gbusg]

Fluke didn't state the bandwidth for their "Ripple and Noise" spec in the 
"Specifications" section of their manual for 335D. However in the 
Performance Test section of their 335D manual, for that test they use a 
Fluke 931B RMS meter, preceded by a preamplifier having a gain of 1000 and 
bandpass of 20 Hz to 30 kHz. So I think they "forgot" to state the noise 
bandwidth on their spec page, even though they intended it.

-Greg

----- Original Message ----- 
From: "WarrenS" <warrensjmail-one at yahoo.com>
To: <volt-nuts at febo.com>
Sent: Tuesday, September 27, 2011 8:41 AM
Subject: Re: [volt-nuts] Fluke 335A


"NOISE data" without the upper and lower Bandwidth used, is a near
meaningless number.
Doing a ADEV plot of the voltage noise is one nice way to include the
Bandwidth with the data.

ws

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I measured a 731 with a scope to see the noise. It was around 25 uVpp. I
think that is the most easy way. You see how much disconnected and how much
its connected. I úse a tektronix 547 with E-plugin for this. ( a lot cheaper
then a 7,5 digit or more multimeter ;-)

Fred PA4TIM
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