[ARC5] Meter Calibration

[D C _Mac_ Macdonald]

Somewhere in the recesses of my memory I seem to remember that the 11 Megohm rating of so many VTVMs "back in the day" consisted of 10 Meg in the instrument and another 1 Meg resistor in the probe!

I still have the original Heathkit "Bench" VTVM with 6" meter I built back in 1963 or so!  I HOPE I took the battery out of it!

 
* * * * * * * * * * * 
* 73 - Mac, K2GKK/5 * 
* (Since 30 Nov 53) * 
* k2gkk at hotmail.com * 
* Oklahoma City, OK * 
* USAF & FAA (Ret.) * 
* * * * * * * * * * * 
 
 
> From: geoffrey at jeremy.mv.com
> To: gzook at yahoo.com; brooke at pacific.net; arc5 at mailman.qth.net
> Date: Sat, 3 Aug 2013 15:40:32 -0400
> Subject: Re: [ARC5] Meter Calibration
> 
> Thanks, its listed at 10M so 1M has to be added to use a Fluke probe.
> Not bad for the price of $45 unless Fleabay has similar cheaper.
> 
> Carl
> 
> 
> ----- Original Message ----- 
> From: Glen Zook
> To: Geoff ; Brooke Clarke ; arc5 at mailman.qth.net
> Sent: Saturday, August 03, 2013 11:21 AM
> Subject: Re: [ARC5] Meter Calibration
> 
> 
> The manual for the 98674 DMM can be found at:
> 
> 
> http://images.harborfreight.com/manuals/98000-98999/98674.pdf

> 
> 
> 
> With just a quick "look", I did not find the input impedance. However, that 
> figure may be somewhere in the manual.
> 
> Glen, K9STH
> 
> 
> 
> Website: http://k9sth.com
> 
> 
> 
> 
> From: Geoff <geoffrey at jeremy.mv.com>
> To: Glen Zook <gzook at yahoo.com>; Brooke Clarke <brooke at pacific.net>; 
> arc5 at mailman.qth.net
> Sent: Saturday, August 3, 2013 8:23 AM
> Subject: Re: [ARC5] Meter Calibration
> 
> 
> I wonder if that DMM will work with a Fluke HV probe? Is the input
> impedance listed?
> 
> Those cheap meters are in every vehicles glove compartment, garage, toolbox,
> etc. Fine for the basics and Ive fried a few also (-; I bought a case lot of
> 20 for something like $50 at a local fleamarket several years ago. Tossed
> the junk batteries and leave batteries out of the unused ones until needed.