{"title":"Micro Ohm Meter","description":null,"products":[{"product_id":"uni-t-ut620c-digital-micro-ohmmeter-1µω-resolution-4-wire-resistance-tester","title":"UNI-T UT620C+ Digital Micro-Ohmmeter - 1µΩ Resolution, 4-Wire Resistance Tester","description":"\u003cp class=\"isSelectedEnd\"\u003eThe UNI-T UT620C+ Micro Ohmmeter is a professional portable low-resistance tester designed for accurate measurement of electrical connections, windings, conductors and components where very small resistance changes matter.\u003c\/p\u003e\n\u003cp class=\"isSelectedEnd\"\u003eUsing the 4-wire Kelvin measurement method, the UT620C+ helps minimise the effect of test lead resistance and provides reliable measurements down to the micro-ohm level. With a measurement range from 0.001mΩ to 300kΩ, up to 1A test current and accuracy up to ±0.1% FS, it is ideal for electrical maintenance, manufacturing, automotive, power distribution and industrial testing.\u003c\/p\u003e\n\u003cp\u003eIts compact handheld design, rechargeable lithium battery and storage for up to 500 measurement records make it suitable for both field and workshop use.\u003c\/p\u003e\n\u003ch2\u003e\u003cspan\u003eIdeal For\u003c\/span\u003e\u003c\/h2\u003e\n\u003cp class=\"isSelectedEnd\"\u003e\u003cspan\u003eThe UT620C+ is particularly useful for engineers and technicians carrying out:\u003c\/span\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eBusbar and electrical joint testing – identify loose, deteriorated or high-resistance connections before they cause overheating or failures.\u003c\/li\u003e\n\u003cli\u003eMotor and generator testing – measure winding resistance and compare phases during commissioning and maintenance.\u003c\/li\u003e\n\u003cli\u003eTransformer maintenance – check winding and connection resistance.\u003c\/li\u003e\n\u003cli\u003eSwitchgear and circuit breaker testing – evaluate contact resistance across switches, breakers, relays and contactors.\u003c\/li\u003e\n\u003cli\u003eEV and battery manufacturing – test welded joints, conductors, terminals and motor\/stator windings.\u003c\/li\u003e\n\u003cli\u003eCable and conductor testing – measure resistance of wires, cables, connectors and terminations.\u003c\/li\u003e\n\u003cli\u003eFuse and component testing – accurately evaluate low-resistance electrical components.\u003c\/li\u003e\n\u003cli\u003eIndustrial preventative maintenance – identify increasing contact resistance before it develops into an operational problem.\u003c\/li\u003e\n\u003cli\u003e\n\u003ctable border=\"0\" cellpadding=\"0\" cellspacing=\"0\" width=\"882\" style=\"border-collapse: collapse; width: 663pt;\"\u003e\n\u003ccolgroup\u003e\n\u003ccol width=\"294\" span=\"3\" style=\"width: 221pt;\"\u003e \u003c\/colgroup\u003e\n\u003ctbody\u003e\n\u003ctr height=\"19\" style=\"height: 14.15pt;\"\u003e\n\u003ctd height=\"19\" class=\"xl65\" width=\"294\" style=\"height: 14.15pt; width: 221pt;\"\u003eSpecification\u003c\/td\u003e\n\u003ctd class=\"xl65\" width=\"294\" style=\"border-left: none; width: 221pt;\"\u003eUT620C+\u003c\/td\u003e\n\u003ctd class=\"xl63\" width=\"294\" style=\"border-left: none; width: 221pt;\"\u003e \u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr height=\"19\" style=\"height: 14.15pt;\"\u003e\n\u003ctd height=\"19\" class=\"xl64\" width=\"294\" style=\"height: 14.15pt; border-top: none; width: 221pt;\"\u003eResistance Measurement Range\u003c\/td\u003e\n\u003ctd class=\"xl64\" width=\"294\" style=\"border-top: none; border-left: none; width: 221pt;\"\u003e0.001mΩ – 300.0kΩ\u003c\/td\u003e\n\u003ctd class=\"xl63\" style=\"border-top: none; border-left: none;\"\u003e \u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr height=\"19\" style=\"height: 14.15pt;\"\u003e\n\u003ctd height=\"19\" class=\"xl64\" width=\"294\" style=\"height: 14.15pt; border-top: none; width: 221pt;\"\u003eMaximum Resolution\u003c\/td\u003e\n\u003ctd class=\"xl64\" width=\"294\" style=\"border-top: none; border-left: none; width: 221pt;\"\u003e1µΩ\u003c\/td\u003e\n\u003ctd class=\"xl63\" style=\"border-top: none; border-left: none;\"\u003e \u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr height=\"19\" style=\"height: 14.15pt;\"\u003e\n\u003ctd height=\"19\" class=\"xl64\" width=\"294\" style=\"height: 14.15pt; border-top: none; width: 221pt;\"\u003eAccuracy\u003c\/td\u003e\n\u003ctd class=\"xl64\" width=\"294\" style=\"border-top: none; border-left: none; width: 221pt;\"\u003eUp to ±0.1% FS\u003c\/td\u003e\n\u003ctd class=\"xl63\" style=\"border-top: none; border-left: none;\"\u003e \u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr height=\"19\" style=\"height: 14.15pt;\"\u003e\n\u003ctd height=\"19\" class=\"xl64\" width=\"294\" style=\"height: 14.15pt; border-top: none; width: 221pt;\"\u003eMeasurement Method\u003c\/td\u003e\n\u003ctd class=\"xl64\" width=\"294\" style=\"border-top: none; border-left: none; width: 221pt;\"\u003e4-wire\u003c\/td\u003e\n\u003ctd class=\"xl63\" style=\"border-top: none; border-left: none;\"\u003e \u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr height=\"19\" style=\"height: 14.15pt;\"\u003e\n\u003ctd height=\"19\" class=\"xl64\" width=\"294\" style=\"height: 14.15pt; border-top: none; width: 221pt;\"\u003eMaximum Test Current\u003c\/td\u003e\n\u003ctd class=\"xl64\" width=\"294\" style=\"border-top: none; border-left: none; width: 221pt;\"\u003e≤1A\u003c\/td\u003e\n\u003ctd class=\"xl63\" style=\"border-top: none; border-left: none;\"\u003e \u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr height=\"19\" style=\"height: 14.15pt;\"\u003e\n\u003ctd height=\"19\" class=\"xl64\" width=\"294\" style=\"height: 14.15pt; border-top: none; width: 221pt;\"\u003eOpen Circuit Voltage\u003c\/td\u003e\n\u003ctd class=\"xl64\" width=\"294\" style=\"border-top: none; border-left: none; width: 221pt;\"\u003e≤4.2V\u003c\/td\u003e\n\u003ctd class=\"xl63\" style=\"border-top: none; border-left: none;\"\u003e \u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr height=\"19\" style=\"height: 14.15pt;\"\u003e\n\u003ctd height=\"19\" class=\"xl64\" width=\"294\" style=\"height: 14.15pt; border-top: none; width: 221pt;\"\u003eInput Protection\u003c\/td\u003e\n\u003ctd class=\"xl64\" width=\"294\" style=\"border-top: none; border-left: none; width: 221pt;\"\u003e≤36V AC\/DC\u003c\/td\u003e\n\u003ctd class=\"xl63\" style=\"border-top: none; border-left: none;\"\u003e \u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr height=\"19\" style=\"height: 14.15pt;\"\u003e\n\u003ctd height=\"19\" class=\"xl64\" width=\"294\" style=\"height: 14.15pt; border-top: none; width: 221pt;\"\u003eMeasurement Speed\u003c\/td\u003e\n\u003ctd class=\"xl64\" width=\"294\" style=\"border-top: none; border-left: none; width: 221pt;\"\u003eApprox. 2 readings\/sec\u003c\/td\u003e\n\u003ctd class=\"xl63\" style=\"border-top: none; border-left: none;\"\u003e \u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr height=\"19\" style=\"height: 14.15pt;\"\u003e\n\u003ctd height=\"19\" class=\"xl64\" width=\"294\" style=\"height: 14.15pt; border-top: none; width: 221pt;\"\u003eData Storage\u003c\/td\u003e\n\u003ctd class=\"xl64\" width=\"294\" style=\"border-top: none; border-left: none; width: 221pt;\"\u003e500 sets\u003c\/td\u003e\n\u003ctd class=\"xl63\" style=\"border-top: none; border-left: none;\"\u003e \u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr height=\"19\" style=\"height: 14.15pt;\"\u003e\n\u003ctd height=\"19\" class=\"xl64\" width=\"294\" style=\"height: 14.15pt; border-top: none; width: 221pt;\"\u003eDisplay\u003c\/td\u003e\n\u003ctd class=\"xl64\" width=\"294\" style=\"border-top: none; border-left: none; width: 221pt;\"\u003eSegment LCD with backlight\u003c\/td\u003e\n\u003ctd class=\"xl63\" style=\"border-top: none; border-left: none;\"\u003e \u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr height=\"19\" style=\"height: 14.15pt;\"\u003e\n\u003ctd height=\"19\" class=\"xl64\" width=\"294\" style=\"height: 14.15pt; border-top: none; width: 221pt;\"\u003eInterface\u003c\/td\u003e\n\u003ctd class=\"xl64\" width=\"294\" style=\"border-top: none; border-left: none; width: 221pt;\"\u003eUSB Type-C\u003c\/td\u003e\n\u003ctd class=\"xl63\" style=\"border-top: none; border-left: none;\"\u003e \u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr height=\"19\" style=\"height: 14.15pt;\"\u003e\n\u003ctd height=\"19\" class=\"xl64\" width=\"294\" style=\"height: 14.15pt; border-top: none; width: 221pt;\"\u003eAuto Power Off\u003c\/td\u003e\n\u003ctd class=\"xl64\" width=\"294\" style=\"border-top: none; border-left: none; width: 221pt;\"\u003eApprox. 15 minutes\u003c\/td\u003e\n\u003ctd class=\"xl63\" style=\"border-top: none; border-left: none;\"\u003e \u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr height=\"19\" style=\"height: 14.15pt;\"\u003e\n\u003ctd height=\"19\" class=\"xl64\" width=\"294\" style=\"height: 14.15pt; border-top: none; width: 221pt;\"\u003eIngress Protection\u003c\/td\u003e\n\u003ctd class=\"xl64\" width=\"294\" style=\"border-top: none; border-left: none; width: 221pt;\"\u003eIP54\u003c\/td\u003e\n\u003ctd class=\"xl63\" style=\"border-top: none; border-left: none;\"\u003e \u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr height=\"19\" style=\"height: 14.15pt;\"\u003e\n\u003ctd height=\"19\" class=\"xl64\" width=\"294\" style=\"height: 14.15pt; border-top: none; width: 221pt;\"\u003eBattery\u003c\/td\u003e\n\u003ctd class=\"xl64\" width=\"294\" style=\"border-top: none; border-left: none; width: 221pt;\"\u003e3.7V 3200mAh rechargeable lithium\u003c\/td\u003e\n\u003ctd class=\"xl63\" style=\"border-top: none; border-left: none;\"\u003e \u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr height=\"19\" style=\"height: 14.15pt;\"\u003e\n\u003ctd height=\"19\" class=\"xl64\" width=\"294\" style=\"height: 14.15pt; border-top: none; width: 221pt;\"\u003eMeasurement Power\u003c\/td\u003e\n\u003ctd class=\"xl64\" width=\"294\" style=\"border-top: none; border-left: none; width: 221pt;\"\u003e≤8W\u003c\/td\u003e\n\u003ctd class=\"xl63\" style=\"border-top: none; border-left: none;\"\u003e \u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr height=\"19\" style=\"height: 14.15pt;\"\u003e\n\u003ctd height=\"19\" class=\"xl64\" width=\"294\" style=\"height: 14.15pt; border-top: none; width: 221pt;\"\u003eDimensions\u003c\/td\u003e\n\u003ctd class=\"xl64\" width=\"294\" style=\"border-top: none; border-left: none; width: 221pt;\"\u003e161 × 117 × 68mm\u003c\/td\u003e\n\u003ctd class=\"xl63\" style=\"border-top: none; border-left: none;\"\u003e \u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr height=\"19\" style=\"height: 14.15pt;\"\u003e\n\u003ctd height=\"19\" class=\"xl64\" width=\"294\" style=\"height: 14.15pt; border-top: none; width: 221pt;\"\u003eWeight\u003c\/td\u003e\n\u003ctd class=\"xl64\" width=\"294\" style=\"border-top: none; border-left: none; width: 221pt;\"\u003eApprox. 480g including battery\u003c\/td\u003e\n\u003ctd class=\"xl63\" style=\"border-top: none; border-left: none;\"\u003e \u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr height=\"19\" style=\"height: 14.15pt;\"\u003e\n\u003ctd height=\"19\" class=\"xl64\" width=\"294\" style=\"height: 14.15pt; border-top: none; width: 221pt;\"\u003eCertifications\u003c\/td\u003e\n\u003ctd class=\"xl64\" width=\"294\" style=\"border-top: none; border-left: none; width: 221pt;\"\u003eCE, RoHS\u003c\/td\u003e\n\u003ctd class=\"xl63\" style=\"border-top: none; border-left: none;\"\u003e \u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr height=\"19\" style=\"height: 14.15pt;\"\u003e\n\u003ctd height=\"19\" class=\"xl63\" style=\"height: 14.15pt; border-top: none;\"\u003e \u003c\/td\u003e\n\u003ctd class=\"xl63\" style=\"border-top: none; border-left: none;\"\u003e \u003c\/td\u003e\n\u003ctd class=\"xl63\" style=\"border-top: none; border-left: none;\"\u003e \u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr height=\"25\" style=\"height: 18.9pt;\"\u003e\n\u003ctd height=\"25\" class=\"xl66\" style=\"height: 18.9pt; border-top: none;\"\u003eMeasurement Ranges\u003c\/td\u003e\n\u003ctd class=\"xl63\" style=\"border-top: none; border-left: none;\"\u003e \u003c\/td\u003e\n\u003ctd class=\"xl63\" style=\"border-top: none; border-left: none;\"\u003e \u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr height=\"19\" style=\"height: 14.15pt;\"\u003e\n\u003ctd height=\"19\" class=\"xl63\" style=\"height: 14.15pt; border-top: none;\"\u003e \u003c\/td\u003e\n\u003ctd class=\"xl63\" style=\"border-top: none; border-left: none;\"\u003e \u003c\/td\u003e\n\u003ctd class=\"xl63\" style=\"border-top: none; border-left: none;\"\u003e \u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr height=\"19\" style=\"height: 14.15pt;\"\u003e\n\u003ctd height=\"19\" class=\"xl64\" width=\"294\" style=\"height: 14.15pt; border-top: none; width: 221pt;\"\u003eResistance Range\u003c\/td\u003e\n\u003ctd class=\"xl64\" width=\"294\" style=\"border-top: none; border-left: none; width: 221pt;\"\u003eTest Current\u003c\/td\u003e\n\u003ctd class=\"xl64\" width=\"294\" style=\"border-top: none; border-left: none; width: 221pt;\"\u003eResolution\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr height=\"19\" style=\"height: 14.15pt;\"\u003e\n\u003ctd height=\"19\" class=\"xl64\" width=\"294\" style=\"height: 14.15pt; border-top: none; width: 221pt;\"\u003e0.001mΩ – 100.00mΩ\u003c\/td\u003e\n\u003ctd class=\"xl64\" width=\"294\" style=\"border-top: none; border-left: none; width: 221pt;\"\u003e1A\u003c\/td\u003e\n\u003ctd class=\"xl64\" width=\"294\" style=\"border-top: none; border-left: none; width: 221pt;\"\u003e0.001 \/ 0.01mΩ\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr height=\"19\" style=\"height: 14.15pt;\"\u003e\n\u003ctd height=\"19\" class=\"xl64\" width=\"294\" style=\"height: 14.15pt; border-top: none; width: 221pt;\"\u003e100.1mΩ – 1000.0mΩ\u003c\/td\u003e\n\u003ctd class=\"xl64\" width=\"294\" style=\"border-top: none; border-left: none; width: 221pt;\"\u003e100mA\u003c\/td\u003e\n\u003ctd class=\"xl64\" width=\"294\" style=\"border-top: none; border-left: none; width: 221pt;\"\u003e0.1mΩ\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr height=\"19\" style=\"height: 14.15pt;\"\u003e\n\u003ctd height=\"19\" class=\"xl64\" width=\"294\" style=\"height: 14.15pt; border-top: none; width: 221pt;\"\u003e1.001Ω – 10.000Ω\u003c\/td\u003e\n\u003ctd class=\"xl64\" width=\"294\" style=\"border-top: none; border-left: none; width: 221pt;\"\u003e10mA\u003c\/td\u003e\n\u003ctd class=\"xl64\" width=\"294\" style=\"border-top: none; border-left: none; width: 221pt;\"\u003e0.001Ω\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr height=\"19\" style=\"height: 14.15pt;\"\u003e\n\u003ctd height=\"19\" class=\"xl64\" width=\"294\" style=\"height: 14.15pt; border-top: none; width: 221pt;\"\u003e10.01Ω – 100.00Ω\u003c\/td\u003e\n\u003ctd class=\"xl64\" width=\"294\" style=\"border-top: none; border-left: none; width: 221pt;\"\u003e1mA\u003c\/td\u003e\n\u003ctd class=\"xl64\" width=\"294\" style=\"border-top: none; border-left: none; width: 221pt;\"\u003e0.01Ω\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr height=\"19\" style=\"height: 14.15pt;\"\u003e\n\u003ctd height=\"19\" class=\"xl64\" width=\"294\" style=\"height: 14.15pt; border-top: none; width: 221pt;\"\u003e100.1Ω – 1000.0Ω\u003c\/td\u003e\n\u003ctd class=\"xl64\" width=\"294\" style=\"border-top: none; border-left: none; width: 221pt;\"\u003e100µA\u003c\/td\u003e\n\u003ctd class=\"xl64\" width=\"294\" style=\"border-top: none; border-left: none; width: 221pt;\"\u003e0.1Ω\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr height=\"19\" style=\"height: 14.15pt;\"\u003e\n\u003ctd height=\"19\" class=\"xl64\" width=\"294\" style=\"height: 14.15pt; border-top: none; width: 221pt;\"\u003e1.001kΩ – 10.000kΩ\u003c\/td\u003e\n\u003ctd class=\"xl64\" width=\"294\" style=\"border-top: none; border-left: none; width: 221pt;\"\u003e10µA\u003c\/td\u003e\n\u003ctd class=\"xl64\" width=\"294\" style=\"border-top: none; border-left: none; width: 221pt;\"\u003e1Ω\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr height=\"19\" style=\"height: 14.15pt;\"\u003e\n\u003ctd height=\"19\" class=\"xl64\" width=\"294\" style=\"height: 14.15pt; border-top: none; width: 221pt;\"\u003e10.01kΩ – 100.00kΩ\u003c\/td\u003e\n\u003ctd class=\"xl64\" width=\"294\" style=\"border-top: none; border-left: none; width: 221pt;\"\u003e3µA\u003c\/td\u003e\n\u003ctd class=\"xl64\" width=\"294\" style=\"border-top: none; border-left: none; width: 221pt;\"\u003e10Ω\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr height=\"19\" style=\"height: 14.15pt;\"\u003e\n\u003ctd height=\"19\" class=\"xl64\" width=\"294\" style=\"height: 14.15pt; border-top: none; width: 221pt;\"\u003e100.1kΩ – 300.0kΩ\u003c\/td\u003e\n\u003ctd class=\"xl64\" width=\"294\" style=\"border-top: none; border-left: none; width: 221pt;\"\u003e3µA\u003c\/td\u003e\n\u003ctd class=\"xl64\" width=\"294\" style=\"border-top: none; border-left: none; width: 221pt;\"\u003e100Ω\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"CHK Shop","offers":[{"title":"Default Title","offer_id":44450871574593,"sku":"UNI-T UT620C","price":350.0,"currency_code":"AUD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0660\/6667\/7825\/files\/UT620C-6.jpg?v=1787206975"},{"product_id":"uni-t-ut620t-10a-dc-resistance-tester-transformer-winding-low-resistance-tester","title":"UNI-T UT620T 10A DC Resistance Tester – Transformer Winding \u0026 Low Resistance Tester","description":"\u003cp class=\"isSelectedEnd\"\u003eThe UNI-T UT620T 10A DC Resistance Tester is a professional high current resistance measurement instrument designed for transformer winding resistance, motors, generators, electrical connections, conductors and other precision DC low-resistance applications.\u003c\/p\u003e\n\u003cp class=\"isSelectedEnd\"\u003eUsing a 4 wire Kelvin measurement method and adjustable test currents up to 10A, the UT620T provides highly accurate resistance measurements across a wide 100μΩ to 1MΩ range.\u003c\/p\u003e\n\u003cp class=\"isSelectedEnd\"\u003eUnlike conventional handheld micro ohmmeters, the UT620T is particularly suited to testing inductive equipment such as transformer windings, with automatic discharge, reverse EMF protection and audible discharge indication helping technicians perform measurements safely and efficiently.\u003c\/p\u003e\n\u003cp\u003eWith a large 7-inch colour display, built-in printer, internal data storage, USB connectivity and rechargeable battery, it is an excellent field instrument for utilities, transformer service companies, electrical contractors and industrial maintenance teams.\u003c\/p\u003e\n\u003ch3\u003e\u003cstrong\u003eDesigned for Transformer Testing\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cp class=\"isSelectedEnd\"\u003eTransformer winding resistance is an important measurement during installation, commissioning, preventative maintenance and fault investigation.\u003c\/p\u003e\n\u003cp class=\"isSelectedEnd\"\u003eThe UT620T can inject up to 10A DC test current, allowing accurate measurement of very low winding and connection resistance.\u003c\/p\u003e\n\u003cp class=\"isSelectedEnd\"\u003eMeasurements can help technicians identify:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003ePoor winding connections\u003c\/li\u003e\n\u003cli\u003eLoose or deteriorated terminals\u003c\/li\u003e\n\u003cli\u003eAbnormal winding resistance\u003c\/li\u003e\n\u003cli\u003eDifferences between transformer phases\u003c\/li\u003e\n\u003cli\u003eTap changer contact problems\u003c\/li\u003e\n\u003cli\u003eConnection deterioration\u003c\/li\u003e\n\u003cli\u003eManufacturing or repair defects\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eThe UT620T is specified for normal internal resistance testing of transformers below 1000kVA.\u003c\/p\u003e","brand":"CHK Shop","offers":[{"title":"Default Title","offer_id":44450904178753,"sku":"UT620T","price":1495.0,"currency_code":"AUD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0660\/6667\/7825\/files\/UT620T-4.png?v=1787207611"},{"product_id":"uni-t-ut625a-ut625b-100a-200a-low-resistance-ohmmeter-circuit-breaker-contact-resistance-tester","title":"UNI-T UT625A \/ UT625B 100A \/ 200A Low Resistance Ohmmeter – Circuit Breaker \u0026 Contact Resistance Tester","description":"\u003cp class=\"isSelectedEnd\"\u003eThe UNI-T UT625A and UT625B High Current Low Resistance Ohmmeters are professional test instruments designed for accurate contact resistance, loop resistance and high-current connection resistance measurement in substations, switchgear, rail networks, renewable energy systems and industrial electrical installations.\u003c\/p\u003e\n\u003cp class=\"isSelectedEnd\"\u003eAvailable in 100A (UT625A) and 200A (UT625B) versions, these instruments inject a controlled high DC test current through the device under test and use a 4-wire Kelvin measurement method to accurately determine very low resistance values down to 0.1μΩ resolution.\u003c\/p\u003e\n\u003cp class=\"isSelectedEnd\"\u003eThey are particularly suited for testing low , medium- and high-voltage circuit breakers, switchgear contacts, busbar joints, cable connections and other high-current electrical connections where even a small increase in resistance can indicate deterioration, contamination, loose connections or contact damage.\u003c\/p\u003e\n\u003cp\u003eWith a 7-inch colour display, built in thermal printer, PASS\/FAIL comparison testing, 200-record storage and PC software connectivity, the UT625 series provides a complete field solution for commissioning, preventative maintenance and asset-condition testing.\u003c\/p\u003e\n\u003ch2\u003eDesigned for Circuit Breaker Contact Resistance Testing\u003c\/h2\u003e\n\u003cp class=\"isSelectedEnd\"\u003eElectrical contacts within circuit breakers and switchgear carry very high currents during normal operation.\u003c\/p\u003e\n\u003cp class=\"isSelectedEnd\"\u003eOver time, contact resistance can increase due to:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eContact wear\u003c\/li\u003e\n\u003cli\u003eOxidation\u003c\/li\u003e\n\u003cli\u003eContamination\u003c\/li\u003e\n\u003cli\u003eMechanical deterioration\u003c\/li\u003e\n\u003cli\u003eLoose connections\u003c\/li\u003e\n\u003cli\u003eContact misalignment\u003c\/li\u003e\n\u003cli\u003eArcing damage\u003c\/li\u003e\n\u003cli\u003ePoor installation or assembly\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp class=\"isSelectedEnd\"\u003eAn increase in resistance can cause localised heating, power loss and potentially premature equipment failure.\u003c\/p\u003e\n\u003cp class=\"isSelectedEnd\"\u003eThe UT625A\/UT625B injects a controlled high DC current through the contact and measures the resulting voltage drop to accurately calculate the contact resistance.\u003c\/p\u003e\n\u003cp\u003eThis provides maintenance teams with a practical way to assess the condition of critical high-current electrical connections.\u003c\/p\u003e","brand":"CHK Shop","offers":[{"title":"100A","offer_id":44450908536897,"sku":"UT625A","price":2645.0,"currency_code":"AUD","in_stock":true},{"title":"200A","offer_id":44450908569665,"sku":"UT625B","price":4405.0,"currency_code":"AUD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0660\/6667\/7825\/files\/UT625A.png?v=1787207942"}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0660\/6667\/7825\/collections\/UT620C-1.jpg?v=1787207336","url":"https:\/\/www.chkshop.com.au\/es\/collections\/micro-ohm-meter.oembed","provider":"CHK Shop","version":"1.0","type":"link"}