8 Aug
2002
8 Aug
'02
3:03 a.m.
At 05:59 PM 8/7/02 -0700, you wrote:
You're probably right. As guess as to what the cut off frequencies are?
Joe
Joe wrote:
Both Zero adjustments seems to have little or no effect on the zero readings but they
have a large effect on the display when you're measuring a signal. IOW they seems to
control gain more than zero. It appears that one controls the displayed value for the
negative measurements and the other controls the display for the positive measurements but
there is a lot of interaction between them.
I picked up an intersting gadget today. It's a model 5203C Memory Voltmeter made by
Micro Instruments. It has a four digit Nixie tube display and appears capture and display
+ or - DC or AC peak voltages. Does anyone know anything about these? It has two zero
adjustments, among other things I'm trying to figure out exactly what they do. Neither
of them seems to "zero" the meter in the normal manner.
Does it affect the readings as you change the zero setting?
After all these years, perhaps the components have drifted
out of tolerance far enough that it doesn't zero anymore? Also what does "Narrow band" and
"wide Band" mean? Changing the setting doesn't change the voltage range so
has to be for something else.
A guess, but a pretty safe one, would be that the AC mode
response might extend up quite a ways and the "narrow-band"
setting is to limit its sensitivity to AC noise for
measuring slow-moving AC voltages like powerline AC volts.