[volt-nuts] Technical details of Fluke 7000 voltage standard
Andreas Jahn
Andreas_-_Jahn at t-online.de
Tue Aug 28 21:47:18 UTC 2012
Hello together,
I have seen in a Fluke application note a block schematic of the Fluke 7000 voltage standard.
In the picture there are 2 DACs (10 ppm / 0.4ppm) for precise voltage adjustment.
See figure 5 on page 3:
http://fluke.informationstore.net/efulfillment.asp?publication=10777-eng
Does anybody know if there are really DACs which are used or if its
only the usual BCD coding switches and the resistor string?
If there are really DACs: which type (voltage output or multiplying DACs) are
actually used? Which integrated circuit?
Has anyone a repair handbook with schematic or photos of the pcb?
With best regards
Andreas
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