X-Authentication-Warning: delorie.com: mail set sender to geda-user-bounces using -f X-Recipient: geda-user AT delorie DOT com X-Original-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20120113; h=mime-version:in-reply-to:references:date:message-id:subject:from:to :content-type; bh=xf1mcSXGape1S6tyFZLS+rVvulrToPGymy5IIf58dfA=; b=indTd3upwItiHthAc+xvvSHttSV/zcw5YubBtpXKuDimHaNpgX7sCjUeg9jUq63suu HC/qSP9asRE93/qD0N3p4tdfWUGkhtY8IdJDKBCtYbZXtYjsziOkUq3P7N0B4GrnDben 9IqOCts6glQa4Xab8YejHUTgFn5n1SPOSJqDo5MttQmJeOThgcJ/lGij9TVvmod1ni9v HFHN24UZdSgHOxF5SGxDnM4PBbsh0BhWFobON0EjjGbd9Rc4RZx68gjvFl3k9BpQdQ12 vKGutfR3jUS59cdMX8ZsOFFENLLXrs0i76aFaihsE0s5rkPnf1k92kLVhuMxloMQrDMl /ALw== MIME-Version: 1.0 X-Received: by 10.112.212.9 with SMTP id ng9mr37942918lbc.57.1435961811244; Fri, 03 Jul 2015 15:16:51 -0700 (PDT) In-Reply-To: <8376edcac9694d2dc0d4195b4810ff45@cam.ac.uk> References: <1435872894 DOT 31269 DOT 7 DOT camel AT cam DOT ac DOT uk> <8376edcac9694d2dc0d4195b4810ff45 AT cam DOT ac DOT uk> Date: Fri, 3 Jul 2015 22:16:51 +0000 Message-ID: Subject: Re: [geda-user] OFFTOPIC: New toy... From: "Evan Foss (evanfoss AT gmail DOT com) [via geda-user AT delorie DOT com]" To: geda-user AT delorie DOT com Content-Type: text/plain; charset=UTF-8 Reply-To: geda-user AT delorie DOT com Errors-To: nobody AT delorie DOT com X-Mailing-List: geda-user AT delorie DOT com X-Unsubscribes-To: listserv AT delorie DOT com Precedence: bulk Ok. It is odd how many people I know use non-isolated probes on things like the 3PH power to the motor. On Fri, Jul 3, 2015 at 9:19 PM, Peter C.J. Clifton wrote: > On 2015-07-03 05:31, Evan Foss (evanfoss AT gmail DOT com) [via > geda-user AT delorie DOT com] wrote: >> >> Little bit of general advise. Get/fabricate a clamp on probe for this. >> Many an oscilloscope have died trying to fix these kind of things. >> Thankfully none of mine but still. > > > I tend to borrow a HV isolation probe (and current clamp if things really > need to get serious).. but have up to 100:1 'scope probes too, that can help > for power circuits. -- Home http://evanfoss.googlepages.com/ Work http://forge.abcd.harvard.edu/gf/project/epl_engineering/wiki/