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.
⚠️ WARNING (California Proposition 65): This product may contain chemicals known to the State of California to cause cancer, birth defects, or other reproductive harm. For more information, please visit www.P65Warnings.ca.gov.
