Re: Somebody knows the RFL/Clarke HESS 828 Calibrator?


"max" <ciulandro@xxxxxxxxx> wrote in message
news:1178378120.419086.228310@xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx
Hi,

is it normal that in a 828 RFL/Clarke HEss calibrator if i set
140mV(as example) at the output i have a tension that is instable :
140.20 to 139.80 all time? What can be?

In the range of 10 volt and 100 Volt the things are better?

Thanks


Marvellous bit of kit!.

Over a 1 minute period I saw 139.88mV to 140.19mV. This ties in with what
you see. Even by itself, +/- 0.1% is not bad for the 3.5 digit setting
thumbwheels.
But ... the noise is not from the RFL but due to low level AC and RF pickup
on the leads from the RFL to the DVM.
A filter of say 1kohm and 1000uF across the DVM input and (my) display is
rock solid at 140.02mV for minutes on end.

Got a 828 manual you could share?.







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