FreeLists / si-list / [SI-LIST] Re: Help me

["Andrew Burnside" <Andrew.Burnside@xxxxxxxxxxxxxxxxxxx>]

As has been pointed out, I was talking cak yesterday.
 
Please ignore my previous message.
 
If you are really worried about using a multimeter, then it is fairly easy to 
construct a crude curve tracer using a PSU,Volt / A mmeter and a Resistance 
box. At least then you can tell what type of short the board has.
 
A.
________________________________

From: si-list-bounce@xxxxxxxxxxxxx on behalf of Andrew Burnside
Sent: Mon 06/02/2006 22:19
To: sunil.mekad@xxxxxxxxx; si-list@xxxxxxxxxxxxx
Subject: [SI-LIST] Re: Help me



Well, if you only have one multimeter, then don't use the high resistance mode. 
This is likely to source more current than the other modes, in order to be able 
to make accurate measurements at high resistnace.
If you must use this mode, put a high value resistor in series.

Alternatively, a current limited bench power supply can make a rough adjustable 
meter.

Regards

Andrew
________________________________

From: si-list-bounce@xxxxxxxxxxxxx on behalf of sunil.mekad@xxxxxxxxx
Sent: Mon 06/02/2006 19:25
To: si-list@xxxxxxxxxxxxx
Subject: [SI-LIST] Re: Help me



Hi,

I have a different question. Is it a good idea to use a multimeter (12V) to 
check shorts for low voltage devices? The applied voltage could damage these 
CMOS devices permanently especially the low voltages!

I usually put the multimeter in high resistance mode and check the resistance. 
I don't know if that too is correct way to go. Does anyone have any other easy 
solution?

Regards
sunil

________________________________

From: si-list-bounce@xxxxxxxxxxxxx on behalf of Andrew Ingraham
Sent: Sat 2/4/2006 9:00 AM
To: si-list@xxxxxxxxxxxxx
Subject: [SI-LIST] Re: help me



> The common multi-meter is of 12V. Is there any multi-meter of other
voltage?

Yes.

Not only will the multimeter with the 12 V battery probably apply a much
smaller voltage when measuring resistance, but not every DVM uses 12 V for
power.  My pocket one uses 3 V.

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