From PICLIST@MITVMA.MIT.EDU Fri Nov 15 09:50:02 2002 Received: from cherry.ease.lsoft.com [209.119.0.109] by dpmail10.doteasy.com with ESMTP (SMTPD32-7.13) id A3CA110100A2; Fri, 15 Nov 2002 09:50:02 -0800 Received: from PEAR.EASE.LSOFT.COM (209.119.0.19) by cherry.ease.lsoft.com (LSMTP for Digital Unix v1.1b) with SMTP id <5.007DCF36@cherry.ease.lsoft.com>; Fri, 15 Nov 2002 12:35:55 -0500 Received: from MITVMA.MIT.EDU by MITVMA.MIT.EDU (LISTSERV-TCP/IP release 1.8d) with spool id 5877 for PICLIST@MITVMA.MIT.EDU; Fri, 15 Nov 2002 12:35:41 -0500 Received: from MITVMA (NJE origin SMTP@MITVMA) by MITVMA.MIT.EDU (LMail V1.2d/1.8d) with BSMTP id 5341; Fri, 15 Nov 2002 12:34:52 -0500 Received: from mailhost.cmc.net [12.33.21.1] by mitvma.mit.edu (IBM VM SMTP Level 320) via TCP with ESMTP ; Fri, 15 Nov 2002 12:34:51 EST X-Comment: mitvma.mit.edu: Mail was sent by mailhost.cmc.net Received: from xero (unknown [209.63.49.54]) by mailhost.cmc.net (Postfix) with SMTP id EFE2E99B for ; Fri, 15 Nov 2002 09:03:18 -0800 (PST) MIME-Version: 1.0 X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 5.50.4133.2400 X-MimeOLE: Produced By Microsoft MimeOLE V5.50.4133.2400 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable Message-ID: <000e01c28cca$41a351e0$36313fd1@xero> Date: Fri, 15 Nov 2002 09:13:02 -0800 Reply-To: pic microcontroller discussion list Sender: pic microcontroller discussion list From: John Pearson Subject: [EE]:Pressure sensor confusion To: PICLIST@MITVMA.MIT.EDU X-RCPT-TO: Status: R X-UIDL: 277600700 X-Evolution-Source: pop://mailinglist%40farcite.net@mail.farcite.net/ X-Evolution: 0000078a-0000 I am having problems figuring out how to use my Motorola pressure sensor MP= S5010dp. The offset voltage is .243v. no pressure applied. I take two seperate vacuum readings: 1.845 v =3D 3.607 Kpa 1.565 v =3D 2.992 Kpa the difference in Kpa is .615 Kpa. But if I take the difference in voltage output =3D .280 volts, and calcula= te the Kpa for the voltage difference I get .1703 Kpa. Why is this? Please assume I am younger than 9 or older than 40 and just a hobbiest. Thanks John -- http://www.piclist.com hint: The PICList is archived three different ways. See http://www.piclist.com/#archives for details.