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G8MNY > TECH 23.06.06 19:46l 30 Lines 1180 Bytes #999 (0) @ WW
BID : 35823_GB7CIP
Read: DL1LCA DB1YAK GUEST
Subj: FLUKE Differential DC/AC VM?
Path: DB0FHN<DB0FOR<DB0SIF<DB0FSG<I4UKI<IR0UCI<I0TVL<TU5EX<ON0BEL<GB7CIP
Sent: 060623/1650Z @:GB7CIP.#32.GBR.EU #:35823 [Caterham] $:35823_GB7CIP
From: G8MNY@GB7CIP.#32.GBR.EU
To : TECH@WW
Hi thanks for reading this.
I am looking for info on this old laboratory Precision Voltmeter Model 823A/AG
_______________
/ÚÄÄÄÄÄÄÄÄ¿ . _ \ It has valves & transistors so must date from 1960s?
³ ³ ³ 4(_) ³ It has 3 input leads, Earth, & 2 test leads. The unit has
³ ³________³ . _ ³ a 500V reference PSU, that is can be precision attenuated
³ ³________³ 9(_) ³ to 50V, 5v or 0.5V, then to a 5 decade attenuator to set
³ . _ ³ the internal ref voltage down 0.01% steps. This voltage
³ () () 9(_) ³ is compared with the external sample with a no drift
³ . _ ³ chopping amp, & the ñ error metered down to ñ1mV FSD.
³ () () 9(_) ³ I assume on AC there is a RMS detector to DC for the
³ o _ ³ same comparison.
³ o () () i 9(_) ³
\o /
~~~~~~~~~~~~~~~
I have no info on this unit? Does anyone remember them? Or how to use the
calibrate function?
I am interested in using it for a DVM calibration source, as internally it will
do ñ500, 50, 5, 0.5V DC down to 0V in 0.01% steps.
Why Don't U send an interesting bul?
73 de John, G8MNY @ GB7CIP
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