[sdiy] Trying to establish confidence in my test equipment

[john mahoney]

----- Original Message ----- 
From: Harry Bissell Jr
> ... (except in Jim Patchell's lab where I hear
> its 50F,! he needs the furnace fixed iirc). ...

Rumor has it that he's replacing the furnace with an all-tube BBD.

Okay, okay. Must. Stay. On. Topic.

I bought a Fluke 177 through an online auction site a couple of years ago.
It has a Techni-Tool sticker on it, says they do calibration and repair. If
I recall correctly, they charge about $100 for a calibration. Ouch! That's
more than half what I paid for the meter. Is Techni-Tool a good place to go
for this? Not that I'm about to have a calibration performed, but I'm
curious. Anyway...

I later got some 0.1% 100K resistors. (1/10 of 1%) I measured about 10 of
them, and they all read 100.1K ohms. (Hey, Servo, have you done the same
exercise? You've got some of the same batch, what do they read for you?)
Some lessons, there, I guess. First, my meter's ohmmeter function seems to
be within a few tenths of a percent of accuracy at 100K, at the worst,
assuming those resistors meet their specification. Second, these precision
resistors were very consistent within this batch. Third, I wish that my
meter had more digits of precision!
--
john