.ut-cat{color:#333;font-family:Arial,Helvetica,sans-serif;line-height:1.5;} .ut-cat h4{color:#1a1a1a;font-size:1.15em;margin:1.5em 0 .5em;padding-bottom:.25em;border-bottom:2px solid #ccc;} .ut-cat h2{color:#1a1a1a;font-size:1.25em;margin:1.2em 0 .4em;} .ut-cat h3{color:#222;font-size:1.05em;margin:1em 0 .3em;} .ut-cat p{margin:.6em 0;} .ut-cat ul{margin:.5em 0;padding-left:1.4em;}.ut-cat li{margin:.25em 0;} .ut-cat img{max-width:100%;height:auto;} .ut-cat table{border-collapse:collapse;width:100%;margin:.5em 0;} .ut-cat th,.ut-cat td{border:1px solid #ddd;padding:6px 10px;text-align:left;vertical-align:top;} .ut-cat td strong{color:#222;} Overview The UT513C is the top of the UT513 line: CAT IV 600 V, test voltages from 250 V to 5 kV, and insulation resistance up to 5 TΩ — the widest range in the family, for high-resistance modern insulation on transformers, large machines, and long cable systems. It adds capacitance measurement from 0.01 µF to 15 µF and a Bluetooth app alongside USB. It runs the full diagnostic set — Polarization Index, Dielectric Absorption Ratio, a 0 s–99 m 59 s timer, and 10%-of-range stepped-voltage profiling — with live leakage display, automatic discharge, and a high-voltage alarm. Results store 999 sets and move to phone or PC. It's backed by UNI-T's nearly 40 years of test-meter manufacturing. Key Features Five selectable test voltages: 250 V, 500 V, 1000 V, 2500 V, 5000 V Insulation resistance up to 5 TΩ, accuracy ±(5%+5) Capacitance measurement 0.01 µF to 15 µF PI and DAR timed diagnostics with 0 s–99 m 59 s timer 10%-of-range stepped-voltage profiling Live leakage-current display and automatic discharge High-voltage output alarm 999-set storage, USB and Bluetooth app CAT IV 600 V; 14.8 V 5200 mAh rechargeable Li-ion UT513C Details 5 TΩ Measurement Range The UT513C reads insulation resistance up to 5 TΩ — the widest in the UT513 family — so high-resistance modern insulation on large transformers and long cable runs stays on-scale where lower-range testers top out. PI, DAR & Stepped-Voltage Profiling The full timed-diagnostic set runs here: PI and DAR separate sound insulation from moisture and contamination, while 10% stepped-voltage profiling stresses the dielectric in stages to expose marginal insulation a fixed reading would pass. Capacitance Measurement Built-in capacitance measurement from 0.01 µF to 15 µF adds context to insulation work — useful for characterizing cable and winding capacitance alongside the resistance reading. Bluetooth App & USB Beyond on-board storage of 999 result sets, the UT513C pairs to a Bluetooth app for live readout and report capture in the field, with USB transfer to a PC for records. Safety & Field Build Automatic discharge and a high-voltage alarm handle the hazards of 5 kV testing; the CAT IV 600 V rating and a 14.8 V 5200 mAh rechargeable pack suit full days on industrial and utility equipment. Compare the UT513 Series UT512E UT513A UT513B UT513C Max test voltage 2500 V 5 kV 5 kV 5 kV Max insulation resistance 2.5 TΩ 1 TΩ 2 TΩ 5 TΩ Voltage stepping (10% of range) Yes — Yes Yes PI / DAR diagnostics PI PI PI / DAR PI / DAR Capacitance measurement 2 µF — — 0.01–15 µF Data storage 999 sets 18 sets 999 sets 999 sets Bluetooth app — — — Yes Safety rating CAT IV 600 V CAT III 600 V CAT IV 600 V CAT IV 600 V Applications High-resistance insulation testing on large transformers and machines; medium-voltage cable and feeder systems; switchgear maintenance and acceptance testing; and any program where capacitance and app-based documentation add value to the insulation record. Frequently Asked Questions How high does the UT513C measure? Up to 5 TΩ — the widest insulation resistance range in the UT513 family. What does the UT513C add over the UT513B? A 5 TΩ range (vs 2 TΩ), capacitance measurement from 0.01 µF to 15 µF, and a Bluetooth app alongside USB. Does it run PI and DAR? Yes — PI, DAR, a measurement timer, and 10% stepped-voltage profiling are all included. Specifications Test Voltages 250 V / 500 V / 1000 V / 2500 V / 5000 V Insulation Resistance up to 5 TΩ IR Accuracy ±(5% + 5) DC Voltage 30 to 1000 V, ±(3% + 5) AC Voltage 30 to 750 V, ±(3% + 5) Test Current 0.01 nA to 5.0 mA Short-Circuit Current ≈5.0 mA Capacitance 0.01 µF to 15 µF PI / DAR Yes Timer Measurement Yes (0s to 99m 59s) Stepping Voltage 10% of range Comparison Function Yes Auto Discharge Yes High Voltage Alarm Yes Data Storage 999 sets Bluetooth App Yes Data Communication USB Safety Rating CAT IV 600 V Power 14.8 V 5200 mAh Li-ion (rechargeable) Dimensions (L × W × D) 238 × 166 × 90.5 mm Weight ≈1800 g Documentation UT513C Datasheet UT513C User Manual
