Return-Path: Received: (qmail 5276 invoked from network); 6 May 2000 02:54:58 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by bells.core.plus.net.uk with SMTP; 6 May 2000 02:54:58 -0000 Received: from majordom by post.thorcom.com with local (Exim 3.02 #1) id 12nudP-0004KD-00 for rsgb_lf_group-outgoing@blacksheep.org; Sat, 06 May 2000 03:48:03 +0100 X-Priority: 3 X-MSMail-Priority: Normal Received: from imo-r20.mx.aol.com ([152.163.225.162] helo=imo-r20.mail.aol.com) by post.thorcom.com with esmtp (Exim 3.02 #1) id 12nudN-0004K6-00 for rsgb_lf_group@blacksheep.org; Sat, 06 May 2000 03:48:02 +0100 Received: from WarmSpgs@aol.com by imo-r20.mx.aol.com (mail_out_v26.7.) id l.5a.4c7dc66 (16789) for ; Fri, 5 May 2000 22:47:08 -0400 (EDT) X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 From: WarmSpgs@aol.com Message-ID: <5a.4c7dc66.2644e1ac@aol.com> Date: Fri, 5 May 2000 22:47:08 EDT Subject: Re: LF: RF Thermo Couple Meter, calibration? To: rsgb_lf_group@blacksheep.org MIME-Version: 1.0 Content-Type: text/plain; charset=US-ASCII; format=flowed Content-Transfer-Encoding: 8bit X-Mailer: AOL 4.0 for Windows 95 sub 102 Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group Sender: Hi Larry, For most thermocouple ammeters, 60 Hz is sufficient to check calibration. The discrepancy between 60 Hz and 137 kHz should not exceed a very few percent. If your AC source is substantially sinusoidal, a fairly common DVM with at least a 3 amp scale will do the job quite nicely. 73, John