{"id":3559,"date":"2025-12-09T09:21:46","date_gmt":"2025-12-09T09:21:46","guid":{"rendered":"https:\/\/pondus-instruments.com\/?p=3559"},"modified":"2025-12-09T09:21:47","modified_gmt":"2025-12-09T09:21:47","slug":"differentialtrycknivagivare","status":"publish","type":"post","link":"https:\/\/pondus-instruments.com\/sv\/knowledge\/differential-pressure-level-transmitter\/","title":{"rendered":"Differentialtryckniv\u00e5givare\u00a0"},"content":{"rendered":"<p class=\"wp-block-paragraph\">En differenstryckgivare (DP) m\u00e4ter v\u00e4tskeniv\u00e5n genom att avk\u00e4nna trycket i botten av en beh\u00e5llare och subtrahera trycket i toppen (eller atmosf\u00e4ren). Det resulterande \u0394p omvandlas till niv\u00e5. Detta \u00e4r standardmetoden f\u00f6r niv\u00e5m\u00e4tning i trycksatta eller ventilerade tankar, inklusive hygieniska till\u00e4mpningar. (\u201cPT60 typ T\u201d och \u201cPT600RSH\u201d fr\u00e5n Pondus Instruments \u00e4r specialkonstruerade exempel.)&nbsp;&nbsp;<\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><strong>Hur det fungerar<\/strong>&nbsp;<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">En DP-niv\u00e5inst\u00e4llning anv\u00e4nder tv\u00e5 avk\u00e4nningspunkter:&nbsp;<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>H\u00f6g\/\u201c+\u201d-sida<\/strong> vid tankens botten m\u00e4ter hydrostatiskt tryck fr\u00e5n v\u00e4tskans tryckh\u00f6jd.\u00a0<\/li>\n<\/ul>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>L\u00e5g\/\u201c\u2013\u201d sida<\/strong> vid tankens \u00f6vre del m\u00e4ter trycket i tanken (eller atmosf\u00e4ren).\u00a0<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">S\u00e4ndaren (eller en parad s\u00e4ndare + fj\u00e4rrsensor) ber\u00e4knar skillnaden. Pondus D10RSH-display kan till och med kombinera en lokal sensor med en fj\u00e4rrsensor f\u00f6r att digitalt ber\u00e4kna differenstrycket \u00f6ver slingan.&nbsp;&nbsp;<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">I hygieniska DP-konstruktioner som PT60 typ T finns ett plusmembran p\u00e5 kroppen medan minusdelen f\u00f6rs in via en kapill\u00e4r. B\u00e5da sidor anv\u00e4nder oljefyllda membran som \u00f6verf\u00f6r trycket till en piezoresistiv sensor.&nbsp;<\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><strong>Viktiga urvalsfaktorer<\/strong>&nbsp;<\/h2>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Statiskt tryck och intervall<\/strong>: V\u00e4lj ett intervall som t\u00e4cker den maximala skillnaden; notera eventuellt statiskt tryck som b\u00e5da sidor uts\u00e4tts f\u00f6r samtidigt. Hygienisk DP (typ T) \u00e4r avsedd f\u00f6r tankar med l\u00e5gt till medelh\u00f6gt statiskt tryck.\u00a0\u00a0<\/li>\n<\/ul>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Processanslutning och material i kontakt med v\u00e4tska<\/strong>: Hygieniska muttrar (SMS Rd60-6), kl\u00e4mmor 38\/51 och andra finns tillg\u00e4ngliga; v\u00e4lj membranmaterial som passar mediet (t.ex. Hastelloy C-276).\u00a0\u00a0<\/li>\n<\/ul>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Noggrannhet och turndown<\/strong>: PT600-plattformen erbjuder 0,1% (0,075% som tillval) med 100:1 turndown, l\u00e4mpligt n\u00e4r du beh\u00f6ver en h\u00e5rdvarutyp f\u00f6r m\u00e5nga olika omr\u00e5den.\u00a0\u00a0<\/li>\n<\/ul>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Kommunikation och integration<\/strong>: 4\u201320 mA med HART och MODBUS\/RS-485 \u00e4r standard p\u00e5 PT600, vilket \u00e4r anv\u00e4ndbart f\u00f6r fj\u00e4rrdiagnostik och omkalibrering.\u00a0\u00a0<\/li>\n<\/ul>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Milj\u00f6 och skydd<\/strong>: \u00c5skskydd \u00e4r ett tillval n\u00e4r kabeldragningen \u00e4r exponerad. Ex ia-egens\u00e4kerhet finns tillg\u00e4ngligt (inte i kombination med \u00e5skskyddstillvalet).\u00a0\u00a0<\/li>\n<\/ul>\n\n\n\n<h2 class=\"wp-block-heading\"><strong>Installationsalternativ<\/strong>&nbsp;<\/h2>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Klassisk DP-s\u00e4ndare (enkel kropp)<\/strong>: B\u00e5da processidorna ansluts till en DP-kropp. Bra n\u00e4r impulsledningarna \u00e4r korta och l\u00e4ttillg\u00e4ngliga. (Pondus <a href=\"https:\/\/pondus-instruments.com\/sv\/produkt\/pt600\/\" target=\"_blank\" rel=\"noreferrer noopener\">PT600RSH<\/a>)\u00a0\u00a0<\/li>\n<\/ul>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Hygienisk DP med kapill\u00e4r p\u00e5 minus-sidan<\/strong>: Minimerar d\u00f6da ben i sanitetsbeh\u00e5llare och f\u00f6renklar reng\u00f6ringen (Pondus <a href=\"http:\/\/pondus-instruments.com\/sv\/produkt\/pt60\/\" target=\"_blank\" rel=\"noreferrer noopener\">PT60 typ T<\/a>).\u00a0\u00a0<\/li>\n<\/ul>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Digital DP med tv\u00e5 sensorer<\/strong>: Anv\u00e4nd tv\u00e5 tryckgivare som \u00e4r kopplade via D10RSH f\u00f6r att ber\u00e4kna differentialen \u2013 praktiskt n\u00e4r en enda DP-enhet \u00e4r opraktisk eller n\u00e4r du beh\u00f6ver enkelt kunna byta ut sensorn. \u00a0<\/li>\n<\/ul>\n\n\n\n<h2 class=\"wp-block-heading\"><strong>God praxis<\/strong>&nbsp;<\/h2>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Nollst\u00e4llning efter installation<\/strong>: Monteringsriktning och hantering av membranet kan f\u00f6r\u00e4ndra nollpunkten. Med PT600:s Autozero kan du \u00e5terst\u00e4lla 4 mA till den faktiska \u2019nollniv\u00e5n\u201c via en knapp eller genom att kortsluta tv\u00e5 stift \u2013 utan extra verktyg. \u00a0<\/li>\n<\/ul>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Hantera temperatureffekter<\/strong>: Kapill\u00e4rerna p\u00e5 minus-sidan reagerar l\u00e5ngsammare och kan p\u00e5verka temperaturen. Isolera och leda s\u00e5 att kapill\u00e4ren och kroppen h\u00e5ller samma temperatur.\u00a0\u00a0<\/li>\n<\/ul>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Planera f\u00f6r EMI och \u00f6versp\u00e4nningar<\/strong>: Om det finns risk f\u00f6r blixtnedslag, specificera det integrerade \u00f6versp\u00e4nningsskyddet och kopplingsskydden korrekt.\u00a0\u00a0<\/li>\n<\/ul>\n\n\n\n<h2 class=\"wp-block-heading\"><strong>Typiska funktioner du kan f\u00f6rv\u00e4nta dig av Pondus Instruments<\/strong>&nbsp;<\/h2>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Noggrannhet och stabilitet<\/strong> med smart kompensation och membran med minimal oljevolym. \u00a0<\/li>\n<\/ul>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Robust hygienisk design<\/strong> klassad f\u00f6r kontinuerlig 150 \u00b0C media p\u00e5 PT60\/PT600-familjerna. \u00a0<\/li>\n<\/ul>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Flexibel I\/O<\/strong>: 4\u201320 mA + HART + MODBUS \u00f6ver hela linjen. \u00a0<\/li>\n<\/ul>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>F\u00e4ltverktyg<\/strong>: PI200PS\/PSD-kit och MEP7 Modbus Tool f\u00f6r konfiguration och underh\u00e5ll.\u00a0<\/li>\n<\/ul>\n\n\n\n<h2 class=\"wp-block-heading\"><strong>Matchande produkter (diskret v\u00e4gledning)<\/strong>&nbsp;<\/h2>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Trycksatta tankar f\u00f6r livsmedel och life science<\/strong> \u2192 (Hygienisk differenstryckgivare av typ PT60 T) f\u00f6r hygieniska installationer med plus p\u00e5 kroppen\/minus via kapill\u00e4r.\u00a0\u00a0<\/li>\n<\/ul>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Allm\u00e4n industriell DP\/niv\u00e5<\/strong> \u2192 (PT600RSH differenstryckgivare) med Autozero, HART\/MODBUS, blixtoptional.\u00a0\u00a0<\/li>\n<\/ul>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Utmanande layouter eller enkla utbytesbehov<\/strong> \u2192 l\u00f6sning med tv\u00e5 sensorer som anv\u00e4nder (\u201cD10RSH-display\u201d) f\u00f6r att ber\u00e4kna \u0394p fr\u00e5n tv\u00e5 s\u00e4ndare.\u00a0\u00a0<\/li>\n<\/ul>\n\n\n\n<h2 class=\"wp-block-heading\"><strong>Slutsats<\/strong>&nbsp;<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">En differenstryckniv\u00e5givare best\u00e4mmer niv\u00e5n genom att subtrahera trycket i utrymmet ovanf\u00f6r v\u00e4tskan fr\u00e5n det hydrostatiska trycket i botten. Den \u00e4r robust f\u00f6r b\u00e5de ventilerade och trycksatta beh\u00e5llare och finns i hygieniska och digitala varianter f\u00f6r att passa dina process- och integrationsbehov. F\u00f6r sanit\u00e4ra tankar, \u00f6verv\u00e4g PT60 typ T. F\u00f6r allm\u00e4n DP\/niv\u00e5 med avancerad diagnostik och enkel nollst\u00e4llning, \u00f6verv\u00e4g PT600RSH.&nbsp;&nbsp;<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Har du fler fr\u00e5gor eller beh\u00f6ver du v\u00e4gledning f\u00f6r att v\u00e4lja r\u00e4tt trycktransmitter? Kontakta Pondus Instruments s\u00e5 hj\u00e4lper vi dig att hitta den l\u00f6sning som b\u00e4st passar dina behov.&nbsp;<\/p>","protected":false},"excerpt":{"rendered":"<p>A differential pressure (DP) level transmitter measures liquid level by sensing the pressure at the bottom of a vessel and subtracting the pressure at the top (or atmosphere); the resulting \u0394p is converted to level. This is the standard approach for level in pressurised or vented tanks, including hygienic applications. (\u201cPT60 type T\u201d and \u201cPT600RSH\u201d [&hellip;]<\/p>\n","protected":false},"author":6,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"site-sidebar-layout":"default","site-content-layout":"","ast-site-content-layout":"default","site-content-style":"default","site-sidebar-style":"default","ast-global-header-display":"","ast-banner-title-visibility":"","ast-main-header-display":"","ast-hfb-above-header-display":"","ast-hfb-below-header-display":"","ast-hfb-mobile-header-display":"","site-post-title":"","ast-breadcrumbs-content":"","ast-featured-img":"","footer-sml-layout":"","ast-disable-related-posts":"","theme-transparent-header-meta":"","adv-header-id-meta":"","stick-header-meta":"","header-above-stick-meta":"","header-main-stick-meta":"","header-below-stick-meta":"","astra-migrate-meta-layouts":"set","ast-page-background-enabled":"default","ast-page-background-meta":{"desktop":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"ast-content-background-meta":{"desktop":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"footnotes":""},"categories":[16],"tags":[],"class_list":["post-3559","post","type-post","status-publish","format-standard","hentry","category-knowledge"],"_links":{"self":[{"href":"https:\/\/pondus-instruments.com\/sv\/wp-json\/wp\/v2\/posts\/3559","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/pondus-instruments.com\/sv\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/pondus-instruments.com\/sv\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/pondus-instruments.com\/sv\/wp-json\/wp\/v2\/users\/6"}],"replies":[{"embeddable":true,"href":"https:\/\/pondus-instruments.com\/sv\/wp-json\/wp\/v2\/comments?post=3559"}],"version-history":[{"count":1,"href":"https:\/\/pondus-instruments.com\/sv\/wp-json\/wp\/v2\/posts\/3559\/revisions"}],"predecessor-version":[{"id":3560,"href":"https:\/\/pondus-instruments.com\/sv\/wp-json\/wp\/v2\/posts\/3559\/revisions\/3560"}],"wp:attachment":[{"href":"https:\/\/pondus-instruments.com\/sv\/wp-json\/wp\/v2\/media?parent=3559"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/pondus-instruments.com\/sv\/wp-json\/wp\/v2\/categories?post=3559"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/pondus-instruments.com\/sv\/wp-json\/wp\/v2\/tags?post=3559"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}