[volt-nuts] HP 3456A Setup

[WarrenS]

HP 3456A front panel set up to measure low noise precision references, 
Preferable the difference between to two like units

With the input (or difference)  to be measured connected to the "Volts" 
inputs
0) warm it up for a few hrs or days, especially if you are not using an 
external reference voltage.

1) Select "DC volts"
2) "Guard button" IN
3) "Auto Zero" ON
4)  "Filter" OFF
5) "Auto Range" Selected
6) "INT" selected
 7) enter-keys  "6", "Store", "N DIG DISP" (#9 key)
8)  enter-keys  "100", "Store", N Cycles Int" (CHS key)
9) with Inputs shorted  push  "Math" "Off" (#0 key)
9a) then push "Math" "Null" (#3 key)

If you have a good external 10 volt reference that is floating,  it can be 
used by connecting it to the "Ratio Ref" inputs,
Add  a Jumper from "Ref Low Input"  to "Signal Low input"
and select DC Ratio mode with "Shift" "DC_Volts"

Measure away and have fun
ws

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> From: John Ackermann   N8UR
> Subject: [volt-nuts] HP 3456A Setup
>
> Any suggestion on the best settings to use (particularly the PLC 
> integration and filtering)
> to get the best accuracy and resolution for DC measurements with a 3456A 
> where reading speed isn't an issue?
>
> John
>
>
> ------------------------------