{"id":2993,"date":"2022-02-26T14:33:10","date_gmt":"2022-02-26T13:33:10","guid":{"rendered":"http:\/\/en.testnordic.com\/?post_type=product&#038;p=2993"},"modified":"2025-03-21T10:08:57","modified_gmt":"2025-03-21T09:08:57","slug":"smal-hand-held-tdr-420","status":"publish","type":"product","link":"https:\/\/testnordic.se\/en\/product\/smal-hand-held-tdr-420\/","title":{"rendered":"Small Hand held TDR-420"},"content":{"rendered":"<p>TDR-420 reflectometer allows to measure the length of the cable and determine the distance to damage or impedance variation in the range of 4 m to 6000 m in conductors with metal wires. The shortest measuring range of 7 meters and a dead zone of 0.6 meters allows to locate damages at a very close distance from the place where the device is connected.<\/p>\n<p>Two cursors allow to determine the place of two damages simultaneously and the distance between them. Thanks to the color 3,5\u201d TFT display with a resolution of 320 x 240 pixels, the indication of the location of the damage is precise and the results easier to interpret.<\/p>\n<p>Difficult environment conditions during measurement work are frequent problems encountered by electric installers and maintenance services. Thanks to the unique housing TDR-420 ensure a degree of protection on IP67 level, what means dustproof and protection against water penetration during short-term immersion. Therefore, working in very dusty terrain or accidental contact of the device with water will not affect the correct operation of the reflectometer.<\/p>\n<p><strong>Product features<\/strong><\/p>\n<p>Possibility damage-free location of impedance changes of tested cables and wires such as:<\/p>\n<ul>\n<li style=\"list-style-type: none;\">\n<ul>\n<li>shorted conductor<\/li>\n<li>open conductor \/ end of cable \u2013 useful during the inventory of warehouses and stores,<\/li>\n<li>splice,<\/li>\n<li>splitter,<\/li>\n<li>water ingress,<\/li>\n<li>wet splice,<\/li>\n<li>bridge tap or other changes.<\/li>\n<\/ul>\n<\/li>\n<li>Single measurement mode\u00a0<strong>ONCE<\/strong><\/li>\n<li>Continuously measurement mode<strong>\u00a0CONT<\/strong>,<\/li>\n<li>Tone signal generator\u00a0<strong>TONE<\/strong><\/li>\n<li><strong>Two cursors\u00a0<\/strong>to mark two places of damage along with an indication of the distance between them,<\/li>\n<li>Built-in\u00a0<strong>HELP\u00a0<\/strong>function for easier interpretation of the reflectogram,<\/li>\n<li><strong>11<\/strong>\u00a0available measuring ranges\u00a0<strong>from 7 m to 6000 m<\/strong>\u201edead zone\u201d limited to 0.6 m,<\/li>\n<li>Color 3,5\u201d LCD TFT display with resolution 320 x 240 pixels<strong>,<\/strong><\/li>\n<li>manually set of sensitivity in 8 steps\u00a0<strong>GAIN<\/strong>,<\/li>\n<li>output impedance regulation\u00a0<strong>up to 200 \u03a9<\/strong>\u00a0(possibility of measuring pre-insulated pipes),<\/li>\n<li>Velocity of Propagation set in range\u00a0<strong>from 10% to 99%, <\/strong>tight and durable housing with<strong>\u00a0IP67<\/strong>\u00a0ingress protection degree.<\/li>\n<li>Small size and weight.<\/li>\n<\/ul>\n<p><strong>Technical specification<\/strong><\/p>\n<ul>\n<li>Measurement ranges: 7, 15, 30, 60, 120, 250, 500 m, 1, 2, 3, 6 km \/ 20, 45, 90, 180, 360, 750, 1500, 3000, 6000, 10000, 20000 ft<\/li>\n<li>Accuracy:1% of selected range<\/li>\n<li>Resolution: Approx. 1% of selected range<\/li>\n<li>Min. Cable length: 4 m \/ (14 ft)<\/li>\n<li>Velocity of propagation VoP: Adjustable from 10 to\u202699% or 15\u2026148,5 m\/\u00b5s<\/li>\n<li>Output Pulse: 5 Vp-p (open circuit)<\/li>\n<li>Output Impedance: 25, 50, 75, 100, 120, 200 \u2126<\/li>\n<li>Output Impedance: 3 ns\u20263 \u00b5s (depends of range)<\/li>\n<li>Scan rate \/ mode: Up to 3 scans \/ second (CONT) or single (ONCE)<\/li>\n<li>Tone generator: 810 &#8230; 1110 Hz<\/li>\n<li>Battery Life: Up to 8 hours of continuous scan<\/li>\n<li>Power supply: 4 x alkaline batteries 1.5 V type AA or 4 x rechargeable batteries NiMH AA<\/li>\n<li>Auto-OFF: 1, 3, 5, 10, 15 minutes or deactivated<\/li>\n<li>Display: Color 3,5\u201d LCD TFT, 320 x 240 pixels<\/li>\n<li>Voltage protection: 400 V DC \/ 250 V AC<\/li>\n<li>Dimensions: 220 x 98 x 58 mm (8.7 x 3.9 x 2.3 inches)<\/li>\n<li>Weight: 487 g<\/li>\n<li>Electromagnetic standard compatibility EMC: EN 61326-1<\/li>\n<li>Water\/ Dust Proof: IP67<\/li>\n<\/ul>\n<p><strong>Nominal condition of use<\/strong><\/p>\n<ul>\n<li>Operating temperature: -20.. 70\u00b0C<\/li>\n<li>Storage temperature: -30&#8230; 80\u00b0C at humidity &lt;80%<\/li>\n<\/ul>\n<p><strong>Datasheets<\/strong><\/p>\n<div class='w3eden'><!-- WPDM Link Template: Default Template -->\n\n<div class=\"link-template-default card mb-2\">\n    <div class=\"card-body\">\n        <div class=\"media\">\n            <div class=\"mr-3 img-48\"><img decoding=\"async\" class=\"wpdm_icon\" alt=\"Icon\"   src=\"http:\/\/testnordic.com\/wp-content\/plugins\/download-manager\/assets\/file-type-icons\/pdf.png\" \/><\/div>\n            <div class=\"media-body\">\n                <h3 class=\"package-title\"><a href='https:\/\/testnordic.se\/en\/download\/sonel-small-hand-held-tdr-420\/'>Sonel Small Hand held TDR-410 \/ 420<\/a><\/h3>\n                <div class=\"text-muted text-small\"><i class=\"fas fa-copy\"><\/i> 1 file(s) <i class=\"fas fa-hdd ml-3\"><\/i> 1.47 MB<\/div>\n            <\/div>\n            <div class=\"ml-3\">\n                <a class='wpdm-download-link download-on-click btn btn-primary ' rel='nofollow' href='#' data-downloadurl=\"https:\/\/testnordic.se\/en\/download\/sonel-small-hand-held-tdr-420\/?wpdmdl=3445&refresh=6a57601b2e6f71784111131\">Download<\/a>\n            <\/div>\n        <\/div>\n    <\/div>\n<\/div>\n\n<\/div>\n","protected":false},"excerpt":{"rendered":"<div class=\"product-card-model-container product-card-aside\">\n<div class=\"product-card-model\">\n<div class=\"product-card-model-name\">Time Domain Reflectometer.TDR-420 is a hand held Time Domain Reflectometer designed to identify and locate faults in power, telecommunications and teletechnical cables.<\/div>\n<\/div>\n<\/div>\n","protected":false},"featured_media":2994,"template":"","meta":{"_kad_post_transparent":"","_kad_post_title":"","_kad_post_layout":"","_kad_post_sidebar_id":"","_kad_post_content_style":"","_kad_post_vertical_padding":"","_kad_post_feature":"","_kad_post_feature_position":"","_kad_post_header":false,"_kad_post_footer":false,"_kad_post_classname":""},"product_brand":[],"product_cat":[173],"product_tag":[],"yst_prominent_words":[],"class_list":{"0":"post-2993","1":"product","2":"type-product","3":"status-publish","4":"has-post-thumbnail","6":"product_cat-fault-location","7":"product_shipping_class-mellan","9":"first","10":"instock","11":"sale","12":"taxable","13":"shipping-taxable","14":"purchasable","15":"product-type-simple","16":"entry","17":"content-bg","18":"loop-entry"},"_links":{"self":[{"href":"https:\/\/testnordic.se\/en\/wp-json\/wp\/v2\/product\/2993","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/testnordic.se\/en\/wp-json\/wp\/v2\/product"}],"about":[{"href":"https:\/\/testnordic.se\/en\/wp-json\/wp\/v2\/types\/product"}],"version-history":[{"count":1,"href":"https:\/\/testnordic.se\/en\/wp-json\/wp\/v2\/product\/2993\/revisions"}],"predecessor-version":[{"id":12490,"href":"https:\/\/testnordic.se\/en\/wp-json\/wp\/v2\/product\/2993\/revisions\/12490"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/testnordic.se\/en\/wp-json\/wp\/v2\/media\/2994"}],"wp:attachment":[{"href":"https:\/\/testnordic.se\/en\/wp-json\/wp\/v2\/media?parent=2993"}],"wp:term":[{"taxonomy":"product_brand","embeddable":true,"href":"https:\/\/testnordic.se\/en\/wp-json\/wp\/v2\/product_brand?post=2993"},{"taxonomy":"product_cat","embeddable":true,"href":"https:\/\/testnordic.se\/en\/wp-json\/wp\/v2\/product_cat?post=2993"},{"taxonomy":"product_tag","embeddable":true,"href":"https:\/\/testnordic.se\/en\/wp-json\/wp\/v2\/product_tag?post=2993"},{"taxonomy":"yst_prominent_words","embeddable":true,"href":"https:\/\/testnordic.se\/en\/wp-json\/wp\/v2\/yst_prominent_words?post=2993"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}