{"product_id":"utl1040s-400w-high-resolution-programmable-dc-electronic-load","title":"UTL1040S 400W High-Resolution Programmable DC Electronic Load","description":"\u003cstyle\u003e\n.ut-cat{color:#333;font-family:Arial,Helvetica,sans-serif;line-height:1.5;}\n.ut-cat h4{color:#1a1a1a;font-size:1.15em;margin:1.5em 0 .5em;padding-bottom:.25em;border-bottom:2px solid #ccc;}\n.ut-cat h2{color:#1a1a1a;font-size:1.25em;margin:1.2em 0 .4em;}\n.ut-cat h3{color:#222;font-size:1.05em;margin:1em 0 .3em;}\n.ut-cat p{margin:.6em 0;}\n.ut-cat ul{margin:.5em 0;padding-left:1.4em;}.ut-cat li{margin:.25em 0;}\n.ut-cat img{max-width:100%;height:auto;}\n.ut-cat table{border-collapse:collapse;width:100%;margin:.5em 0;}\n.ut-cat th,.ut-cat td{border:1px solid #ddd;padding:6px 10px;text-align:left;vertical-align:top;}\n.ut-cat td strong{color:#222;}\n\u003c\/style\u003e\n\u003cdiv class=\"ut-cat\"\u003e\n\n\u003ch4\u003eOverview\u003c\/h4\u003e\n\u003cdiv class=\"product-container\"\u003e\n\u003cp\u003eThe \u003cstrong\u003eUNI-T UTL1040S\u003c\/strong\u003e is a single-channel programmable DC electronic load rated 400 W, 0–150 V, 0–30 A. It runs four constant modes — CC, CV, CR, CP — plus eleven additional test modes including dynamic, OVP, OCP, time, CR-LED, battery, automatic list, short-circuit, load-effect, combination, and list, for 15 test modes in total. Synchronous sampling reaches 500 kHz with high-performance DSP processing and a self-adaptive voltage and current waveform display on the 4.3-inch TFT LCD.\u003c\/p\u003e\n\u003cp\u003eDynamic mode pulls load at up to 50 kHz so current and voltage peaks — Vpp and Ipp — can be observed directly. The load also provides on-screen ripple measurement, a rear-panel Sense terminal for remote voltage compensation, and SCPI remote control over RS232 with a HANDLER interface and USB Host port for data logging and automated production test.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"product-container\"\u003e\n\u003ch2\u003eChoosing Your Model — 400 W 15-Mode Load\u003c\/h2\u003e\n\u003cp\u003eTwo 400 W models share the same load architecture, the same 15 test modes, the same accuracy class, and the same 0–150 V \/ 0–30 A input envelope. They differ in one axis only: measurement resolution.\u003c\/p\u003e\n\u003ctable class=\"product-spec-table\"\u003e\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e\n\u003cstrong\u003eUTL1040S\u003c\/strong\u003e (high-resolution)\u003c\/td\u003e\n\u003ctd\u003eCurrent resolution 0.01 mA \/ 0.1 mA, voltage readback 0.01 mV \/ 0.1 mV — finer metering for precision readback work.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\n\u003cstrong\u003eUTL1040S-E\u003c\/strong\u003e (standard resolution)\u003c\/td\u003e\n\u003ctd\u003eSame 400 W load, same 15 modes; current resolution 0.1 mA \/ 1 mA, voltage readback 0.1 mV \/ 1 mV. The lower-cost choice when fine readback resolution is not the deciding factor.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\u003c\/table\u003e\n\u003cp\u003eThis page describes the \u003cstrong\u003eUTL1040S\u003c\/strong\u003e. Capability, test modes, protection, and interfaces below apply to both 400 W models; the Specifications table lists this model's resolution figures.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"product-container\"\u003e\n\u003ch2\u003eKey Features\u003c\/h2\u003e\n\u003cdiv class=\"product-key-features\"\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003e400 W, 0–150 V, 0–30 A single-channel load\u003c\/strong\u003e — CC, CV, CR, CP basic modes with dual high\/low input ranges.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e15 test modes\u003c\/strong\u003e — CC, CV, CR, CP, dynamic, OVP, time, OCP, CR-LED, battery, automatic list, short circuit, load effect, combination, list.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e500 kHz synchronous sampling\u003c\/strong\u003e — high sampling density for accurate transient capture and reduced measurement omission.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e50 kHz dynamic mode\u003c\/strong\u003e — programmable rise\/fall slope (0.0006–3 A\/µs) simulates real changing load conditions; Vpp \/ Ipp observed directly.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBattery test with charge and discharge curves\u003c\/strong\u003e — records both charge and discharge curves for battery characterization.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAutomatic list test\u003c\/strong\u003e — up to 200-step programmable multi-mode sequences for automated, repeatable testing.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOn-screen ripple measurement and real-time waveform\u003c\/strong\u003e — ripple readout in the screen corner; [WAVE] key shows live V\/I waveform without an external oscilloscope.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRemote compensation (Sense terminal)\u003c\/strong\u003e — rear-panel Sense terminal eliminates lead voltage-drop error at high current.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRS232 \/ USB Host \/ HANDLER, SCPI protocol\u003c\/strong\u003e — PC software control, USB-drive screenshots and list import\/export, HANDLER for ATE integration.\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003eCurrent resolution 0.01 mA \/ 0.1 mA, voltage readback 0.01 mV \/ 0.1 mV, 16-bit CR, 3 years standard + 2 year extension.\u003c\/strong\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"product-container\"\u003e\n\u003ch2\u003eUNI-T UTL1040S Details\u003c\/h2\u003e\n\u003cdiv class=\"product-row\"\u003e\n\u003cdiv class=\"product-box product-left\"\u003e\n\u003ch3\u003e15 Test Modes for Power, Battery, and LED-Driver Validation\u003c\/h3\u003e\n\u003cp\u003eFour constant modes — CC (constant current), CV (constant voltage), CR (constant resistance), CP (constant power) — plus eleven more: dynamic, OVP, time, OCP, CR-LED, battery, automatic list, short-circuit, load effect, combination, and list. The CR-LED mode simulates real LED forward-voltage behavior for LED-driver testing; battery mode records charge and discharge curves; combination mode pairs two basic modes (CR+CC, CV+CR, CV+CC) for more realistic DUT conditions.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"product-box product-right\"\u003e\u003cfigure class=\"product-figure\"\u003e\n\n\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0822\/9208\/0924\/files\/UTL1000S_test-modes_sq.jpg?v=1770678169\" alt=\"UTL1040S 15 test modes covering power, battery, and LED-driver validation\" class=\"product-image-thumb\"\u003e\n\n\u003cfigcaption class=\"product-figcaption\"\u003e15 Test Modes for Power, Battery, and LED-Driver Validation\u003c\/figcaption\u003e\n\u003c\/figure\u003e\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"product-row\"\u003e\n\u003cdiv class=\"product-box product-left\"\u003e\u003cfigure class=\"product-figure\"\u003e\n\n\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0822\/9208\/0924\/files\/UTL1000S_dynamic-testing_sq.jpg?v=1770678169\" alt=\"UTL1040S dynamic mode 50 kHz transient load simulation\" class=\"product-image-thumb\"\u003e\n\n\u003cfigcaption class=\"product-figcaption\"\u003eDynamic Mode — 50 kHz Transient Load Simulation\u003c\/figcaption\u003e\n\u003c\/figure\u003e\u003c\/div\u003e\n\u003cdiv class=\"product-box product-right\"\u003e\n\u003ch3\u003eDynamic Mode — 50 kHz Transient Load Simulation\u003c\/h3\u003e\n\u003cp\u003eDynamic mode pulls load at frequencies up to 50 kHz with T1\/T2 timing from 10 µs to 50 s (1 µs resolution) and a programmable rising\/falling current slope of 0.0006 A\/µs to 3 A\/µs. The current and voltage peak waveforms are observed directly on screen with Vpp and Ipp measurement, so transient response and overshoot of the device under test can be characterized without a separate oscilloscope.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"product-row\"\u003e\n\u003cdiv class=\"product-box product-left\"\u003e\n\u003ch3\u003eBattery Test with Charge and Discharge Curves\u003c\/h3\u003e\n\u003cp\u003eBattery mode performs constant-current or constant-power discharge testing and records the full discharge curve. The UTL1040S captures both the discharge and the charging curve, so capacity, internal-resistance behavior, and cycle characteristics are traceable from a single instrument — useful for battery-pack, BMS, and power-bank validation.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"product-box product-right\"\u003e\u003cfigure class=\"product-figure\"\u003e\n\n\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0822\/9208\/0924\/files\/UTL1000S_battery-testing.gif\" alt=\"UTL1040S battery test recording charge and discharge curves\" class=\"product-image-thumb\"\u003e\n\n\u003cfigcaption class=\"product-figcaption\"\u003eBattery Test with Charge and Discharge Curves\u003c\/figcaption\u003e\n\u003c\/figure\u003e\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"product-row\"\u003e\n\u003cdiv class=\"product-box product-left\"\u003e\u003cfigure class=\"product-figure\"\u003e\n\n\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0822\/9208\/0924\/files\/UTL1000S_auto-list.gif\" alt=\"UTL1040S automatic list test with up to 200 programmable steps\" class=\"product-image-thumb\"\u003e\n\n\u003cfigcaption class=\"product-figcaption\"\u003eAutomatic List Test — 200-Step Programmable Sequences\u003c\/figcaption\u003e\n\u003c\/figure\u003e\u003c\/div\u003e\n\u003cdiv class=\"product-box product-right\"\u003e\n\u003ch3\u003eAutomatic List Test — 200-Step Programmable Sequences\u003c\/h3\u003e\n\u003cp\u003eThe automatic list test runs editable multi-step, multi-mode sequences with up to 200 steps. Set the appropriate load value and mode for each step and the list executes the full test process automatically. List files save to internal memory or a USB drive and can be imported, so a validated production-test sequence transfers between units quickly.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"product-row\"\u003e\n\u003cdiv class=\"product-box product-left\"\u003e\n\u003ch3\u003eOn-Screen Ripple Measurement and Real-Time Waveform\u003c\/h3\u003e\n\u003cp\u003eRipple is measured and displayed directly in the corner of the screen, replacing a separate oscilloscope measurement for routine power-supply ripple checks. Pressing the [WAVE] function key shows the live voltage and current waveform, with the self-adaptive display scaling automatically to the signal.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"product-box product-right\"\u003e\u003cfigure class=\"product-figure\"\u003e\n\n\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0822\/9208\/0924\/files\/UTL1000S_ripple-measurement_sq.jpg?v=1770678169\" alt=\"UTL1040S on-screen ripple measurement and real-time waveform display\" class=\"product-image-thumb\"\u003e\n\n\u003cfigcaption class=\"product-figcaption\"\u003eOn-Screen Ripple Measurement and Real-Time Waveform\u003c\/figcaption\u003e\n\u003c\/figure\u003e\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"product-row\"\u003e\n\u003cdiv class=\"product-box product-left\"\u003e\u003cfigure class=\"product-figure\"\u003e\n\n\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0822\/9208\/0924\/files\/UTL1000S_ovp_sq.jpg?v=1770678169\" alt=\"UTL1040S OVP and OCP protection-function testing\" class=\"product-image-thumb\"\u003e\n\n\u003cfigcaption class=\"product-figcaption\"\u003eOVP and OCP Protection Testing\u003c\/figcaption\u003e\n\u003c\/figure\u003e\u003c\/div\u003e\n\u003cdiv class=\"product-box product-right\"\u003e\n\u003ch3\u003eOVP and OCP Protection Testing\u003c\/h3\u003e\n\u003cp\u003eSet the protection threshold according to the device under test and the UTL1040S measures the protection function and the protection response time. Overvoltage protection triggers with delayed protection at ≥ 152 V and immediate protection at ≥ 165 V; overcurrent protection at ≥ 30.3 A delayed and ≥ 33 A immediate; overpower at ≥ 404 W delayed and ≥ 440 W immediate. Instrument protection can also be turned off to prevent false alarms during characterization.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"product-row\"\u003e\n\u003cdiv class=\"product-box product-left\"\u003e\n\u003ch3\u003eLoad Effect Test\u003c\/h3\u003e\n\u003cp\u003eThe load effect test automatically measures and calculates load-regulation results from the configured test values, so power-supply load regulation is characterized without manual point-by-point measurement and calculation.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"product-box product-right\"\u003e\u003cfigure class=\"product-figure\"\u003e\n\n\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0822\/9208\/0924\/files\/UTL1000S_load-effect-test_sq.jpg?v=1770678169\" alt=\"UTL1040S automated load effect \/ load regulation test\" class=\"product-image-thumb\"\u003e\n\n\u003cfigcaption class=\"product-figcaption\"\u003eLoad Effect Test\u003c\/figcaption\u003e\n\u003c\/figure\u003e\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"product-row\"\u003e\n\u003cdiv class=\"product-box product-left\"\u003e\u003cfigure class=\"product-figure\"\u003e\n\n\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0822\/9208\/0924\/files\/UTL1000S_time-test_sq.jpg?v=1770678169\" alt=\"UTL1040S time test measuring power-supply rise and fall time\" class=\"product-image-thumb\"\u003e\n\n\u003cfigcaption class=\"product-figcaption\"\u003eTime Test — Rise and Fall Time of the Power Supply\u003c\/figcaption\u003e\n\u003c\/figure\u003e\u003c\/div\u003e\n\u003cdiv class=\"product-box product-right\"\u003e\n\u003ch3\u003eTime Test — Rise and Fall Time of the Power Supply\u003c\/h3\u003e\n\u003cp\u003eTime test measures the rise and fall times of the device under test against configured thresholds, with 1 µs timing resolution and ±100 ppm timing accuracy, for power-supply turn-on \/ turn-off and transient-timing characterization.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"product-container\"\u003e\n\u003ch2\u003eApplications\u003c\/h2\u003e\n\u003cp\u003eThe 400 W 15-mode envelope — CC\/CV\/CR\/CP plus dynamic, battery, list, protection, load-effect, and combination modes with 500 kHz sampling — covers R\u0026amp;D and production test for power electronics.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSwitching power-supply and adapter test\u003c\/strong\u003e — load regulation, ripple, transient response, and protection-function verification from one instrument.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBattery and battery-pack characterization\u003c\/strong\u003e — charge and discharge curve recording for capacity, BMS, and cycle testing.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLED-driver validation\u003c\/strong\u003e — CR-LED mode simulates real LED forward-voltage behavior.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCharger and power-bank testing\u003c\/strong\u003e — automatic list sequences for repeatable multi-step production test.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDC-DC converter and module test\u003c\/strong\u003e — dynamic loading at up to 50 kHz to characterize transient overshoot and recovery.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAutomated production test (ATE)\u003c\/strong\u003e — SCPI over RS232 plus HANDLER interface for test-line integration; list import\/export for fast line setup.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"product-container\"\u003e\n\u003ch2\u003eAccessories and Family Options\u003c\/h2\u003e\n\u003ch3\u003eIncluded with Every Unit\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eAC power cord\u003c\/li\u003e\n\u003cli\u003eRS232 communication cable\u003c\/li\u003e\n\u003cli\u003ePlug-in terminal block (5.08-2P) and screw-free spring terminal block (2.54-6P)\u003c\/li\u003e\n\u003cli\u003eSpare fuse (2 pcs)\u003c\/li\u003e\n\u003cli\u003eCertificate of calibration and multi-language safety precautions\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eOptional Test Leads\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eUT-L0615-OO\u003c\/strong\u003e — double O-type terminal, 60 A \/ 1.5 m\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUT-L0320-UU\u003c\/strong\u003e — double U-type terminal, 30 A \/ 2 m\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUT-L0312-UU\u003c\/strong\u003e — double U-type terminal, 30 A \/ 1.2 m\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUT-L0110-BB\u003c\/strong\u003e — double fold-insert, 10 A \/ 1 m\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUT-L0110-BU\u003c\/strong\u003e — fold-insert to U-type, 10 A \/ 1 m\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eUTL1000S Series\u003c\/h3\u003e\n\u003cp\u003eFour models share the same chassis, 15 test modes, 500 kHz sampling, accuracy class, and 0–150 V \/ 0–30 A input envelope:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eUTL1020S\u003c\/strong\u003e — 200 W, high-resolution\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUTL1020S-E\u003c\/strong\u003e — 200 W, standard resolution\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUTL1040S\u003c\/strong\u003e — 400 W, high-resolution (this product)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUTL1040S-E\u003c\/strong\u003e — 400 W, standard resolution\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"product-container\"\u003e\n\u003ch2\u003eFrequently Asked Questions\u003c\/h2\u003e\n\u003cdiv class=\"product-faq-item\"\u003e\n\u003cp class=\"product-faq-question\"\u003eWhat is the difference between the UTL1040S and the UTL1040S-E?\u003c\/p\u003e\n\u003cp\u003eBoth are 400 W loads with the same 15 test modes, the same accuracy class, and the same 0–150 V \/ 0–30 A input envelope. The difference is measurement resolution: the UTL1040S resolves current to 0.01 mA \/ 0.1 mA and voltage readback to 0.01 mV \/ 0.1 mV across its low and high ranges. The high-resolution model is suited to precision readback work; the standard-resolution model is the lower-cost choice when fine readback resolution is not the deciding factor.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"product-faq-item\"\u003e\n\u003cp class=\"product-faq-question\"\u003eHow many test modes does the UTL1040S have, and what are they?\u003c\/p\u003e\n\u003cp\u003e15 modes: CC, CV, CR, CP, dynamic, OVP, time, OCP, CR-LED, battery, automatic list, short circuit, load effect, combination, list. The four constant modes (CC, CV, CR, CP) cover standard load testing; the remaining modes add transient, protection, battery, LED-driver, automated, and combination testing.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"product-faq-item\"\u003e\n\u003cp class=\"product-faq-question\"\u003eCan the UTL1040S test batteries?\u003c\/p\u003e\n\u003cp\u003eYes. Battery mode performs discharge testing and records both the discharge and the charging curve, so capacity and cycle behavior are traceable from the instrument — useful for battery-pack, BMS, and power-bank validation.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"product-faq-item\"\u003e\n\u003cp class=\"product-faq-question\"\u003eDoes it measure ripple without an oscilloscope?\u003c\/p\u003e\n\u003cp\u003eYes. Ripple is measured and displayed in the corner of the screen, and the [WAVE] key shows the live voltage and current waveform, so routine ripple and waveform checks do not require a separate oscilloscope.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"product-faq-item\"\u003e\n\u003cp class=\"product-faq-question\"\u003eWhat is the Sense terminal for?\u003c\/p\u003e\n\u003cp\u003eAt high current, lead resistance creates a voltage drop between the load and the device under test. The rear-panel Sense terminal measures voltage at the DUT output terminal directly (remote compensation), so the displayed voltage reflects the DUT rather than the voltage after the test leads.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"product-faq-item\"\u003e\n\u003cp class=\"product-faq-question\"\u003eHow is the UTL1040S controlled remotely?\u003c\/p\u003e\n\u003cp\u003eOver RS232 using the standard SCPI protocol with the included PC data-acquisition software. A HANDLER interface supports automated test-line integration, and a USB Host port accepts a USB drive for screenshots and for importing or exporting list files.\u003c\/p\u003e\n\u003c\/div\u003e\n\n\u003c\/div\u003e\n\u003cspan class=\"lightbox-close\"\u003e×\u003c\/span\u003e\n\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0822\/9208\/0924\/files\/UTL1000S_test-modes_sq.jpg?v=1770678169\" alt=\"UTL1040S 15 test modes covering power, battery, and LED-driver validation\"\u003e\n\u003cspan class=\"lightbox-caption\"\u003e15 Test Modes for Power, Battery, and LED-Driver Validation\u003c\/span\u003e\n\n\n\u003cspan class=\"lightbox-close\"\u003e×\u003c\/span\u003e\n\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0822\/9208\/0924\/files\/UTL1000S_dynamic-testing_sq.jpg?v=1770678169\" alt=\"UTL1040S dynamic mode 50 kHz transient load simulation\"\u003e\n\u003cspan class=\"lightbox-caption\"\u003eDynamic Mode — 50 kHz Transient Load Simulation\u003c\/span\u003e\n\n\n\u003cspan class=\"lightbox-close\"\u003e×\u003c\/span\u003e\n\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0822\/9208\/0924\/files\/UTL1000S_battery-testing.gif\" alt=\"UTL1040S battery test recording charge and discharge curves\"\u003e\n\u003cspan class=\"lightbox-caption\"\u003eBattery Test with Charge and Discharge Curves\u003c\/span\u003e\n\n\n\u003cspan class=\"lightbox-close\"\u003e×\u003c\/span\u003e\n\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0822\/9208\/0924\/files\/UTL1000S_auto-list.gif\" alt=\"UTL1040S automatic list test with up to 200 programmable steps\"\u003e\n\u003cspan class=\"lightbox-caption\"\u003eAutomatic List Test — 200-Step Programmable Sequences\u003c\/span\u003e\n\n\n\u003cspan class=\"lightbox-close\"\u003e×\u003c\/span\u003e\n\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0822\/9208\/0924\/files\/UTL1000S_ripple-measurement_sq.jpg?v=1770678169\" alt=\"UTL1040S on-screen ripple measurement and real-time waveform display\"\u003e\n\u003cspan class=\"lightbox-caption\"\u003eOn-Screen Ripple Measurement and Real-Time Waveform\u003c\/span\u003e\n\n\n\u003cspan class=\"lightbox-close\"\u003e×\u003c\/span\u003e\n\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0822\/9208\/0924\/files\/UTL1000S_ovp_sq.jpg?v=1770678169\" alt=\"UTL1040S OVP and OCP protection-function testing\"\u003e\n\u003cspan class=\"lightbox-caption\"\u003eOVP and OCP Protection Testing\u003c\/span\u003e\n\n\n\u003cspan class=\"lightbox-close\"\u003e×\u003c\/span\u003e\n\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0822\/9208\/0924\/files\/UTL1000S_load-effect-test_sq.jpg?v=1770678169\" alt=\"UTL1040S automated load effect \/ load regulation test\"\u003e\n\u003cspan class=\"lightbox-caption\"\u003eLoad Effect Test\u003c\/span\u003e\n\n\n\u003cspan class=\"lightbox-close\"\u003e×\u003c\/span\u003e\n\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0822\/9208\/0924\/files\/UTL1000S_time-test_sq.jpg?v=1770678169\" alt=\"UTL1040S time test measuring power-supply rise and fall time\"\u003e\n\u003cspan class=\"lightbox-caption\"\u003eTime Test — Rise and Fall Time of the Power Supply\u003c\/span\u003e\n\n\u003ch4\u003eSpecifications\u003c\/h4\u003e\n\u003ctable\u003e\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eInput power (rated)\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e400 W\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eInput voltage\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e0–15 V (low) \/ 0–150 V (high)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eInput current\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e0–3 A (low) \/ 0–30 A (high)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eMinimum operating voltage\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e1.4 V ± 0.1 V at 30 A\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eCV mode\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eRange 0.1–150 V, resolution 1 mV, accuracy ±(0.03% + 0.05% FS)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eCC mode\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eResolution 0.01 mA \/ 0.1 mA (low \/ high), accuracy ±(0.03% + 0.05% FS)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eCR mode\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eRange 0.05 Ω – 10 kΩ, resolution 16 bits, accuracy (0.1 + 0.01R)%\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eCP mode\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eRange 400 W, resolution 10 mW, accuracy ±(0.1% + 0.1% FS)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eReadback voltage resolution (CC\/CP)\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e0.01 mV \/ 0.1 mV (low \/ high)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eReadback voltage resolution (CV\/CR)\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e0.1 mV\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eReadback current resolution\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e0.01 mA \/ 0.1 mA (low \/ high)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eReadback accuracy (V \/ I \/ P)\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e±(0.02% + 0.3% FS) \/ ±(0.03% + 0.05% FS) \/ ±(0.1% + 0.1% FS)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eDynamic mode T1 \u0026amp; T2\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e10 µs – 50 s, 1 µs resolution; timing accuracy 1 µs \/ 1 ms ±100 ppm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eDynamic rise\/fall slope\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e0.0006 A\/µs – 3 A\/µs (min. rise time 10 µs)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eDynamic frequency\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e50 kHz\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eSynchronous sampling\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e500 kHz synchronous\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eOverpower protection\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eDelay ≥ 404 W, immediate ≥ 440 W\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eOvercurrent protection\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eDelay ≥ 30.3 A, immediate ≥ 33 A\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eOvervoltage protection\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eDelay ≥ 152 V, immediate ≥ 165 V\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eOver-temperature protection\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e≥ 85 °C\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eShort-circuit (CC \/ CV \/ CR)\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e≥ 30 A \/ 0 V \/ 50 mΩ\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eTest modes\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e15: CC, CV, CR, CP, dynamic, OVP, time, OCP, CR-LED, battery, automatic list, short circuit, load effect, combination, list\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eRipple display \/ waveform record\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eYes \/ Yes\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eInput terminal impedance\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e300 kΩ\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eFuse\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e0.5 A (110 V) \/ 0.25 A (220 V)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eInterface\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eRS232, USB Host, HANDLER\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eProtocol\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eSCPI\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eDisplay\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e4.3-inch TFT LCD\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003ePower requirement\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e110 V \/ 220 V, 50\/60 Hz\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eDimensions (W×H×D)\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e215 × 88 × 372 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eNet weight\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e4.49 kg\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eOperating temperature\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e0 °C – 40 °C\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eAccuracy temperature \/ calibration\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e25 ± 5 °C \/ 1 \/ year\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\u003c\/table\u003e\n\n\u003ch4\u003eDocumentation\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003e\u003ca href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0822\/9208\/0924\/files\/UTL1000S_Series_DC_Electronic_Load_-_Data_Sheet.pdf?v=1772202746\"\u003eUTL1040S Datasheet\u003c\/a\u003e\u003c\/li\u003e\n  \u003cli\u003e\u003ca href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0822\/9208\/0924\/files\/UTL1000S_Series_DC_Electronic_Load_-_Manuals.zip?v=1772202727\"\u003eUTL1040S User Manual\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003c\/div\u003e","brand":"Uni-Trend US","offers":[{"title":"Default Title","offer_id":46595301900449,"sku":"181500100143X","price":999.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0735\/5649\/2449\/files\/UTL1040S-E_1_sq_9199d021-6c1c-498f-a183-430c7850f004.jpg?v=1782259751","url":"https:\/\/aaashopus.com\/products\/utl1040s-400w-high-resolution-programmable-dc-electronic-load","provider":"SHOPSHOPSHOP","version":"1.0","type":"link"}