UT677A+/UT677C Internal Resistance Tester
The UT677 series are devices for assessing the condition of rechargeable batteries, including lead-acid and lithium types, by measuring their internal resistance and voltage. Using the AC four-terminal method, it accurately measures internal resistance without interference from lead resistance. Features include data storage, retrieval, alarms, auto shut-off, and strong anti-interference, making it essential for battery production, installation, and maintenance.
Product Details
The UT677 series are devices for assessing the condition of rechargeable batteries, including lead-acid and lithium types, by measuring their internal resistance and voltage. Using the AC four-terminal method, it accurately measures internal resistance without interference from lead resistance. Features include data storage, retrieval, alarms, auto shut-off, and strong anti-interference, making it essential for battery production, installation, and maintenance.
Features of UT677 series (UT677A+/UT677C) Battery inernal resistance tester
Certifications: CE
1. Battery internal resistance: 0-3Ω(4 ranges; 1μΩ);
2. Voltage(UT677A+): 0-70V;
3. Voltage(UT677C): 0-120V;
4. Manual & auto measurement;
5. PC software and Bluetooth APP supported;
6. Rechargeable Lithium Battery: 2600mAh;
7. Auto power off and low battery indication;
8. Fast response (200ms); test time: 2s
9. Data hold and storage (500 set);
10. CE certificated
FAQ
Q: What is UNI-T UT677 series used for?
A: It is a battery internal resistance analyzer, used to test internal resistance and voltage of lithium batteries, lead-acid batteries, UPS batteries and energy storage battery packs, also can test ESR of electrolytic capacitors for reference.
Q: What is the advantage of 4-wire test?
A: 4-terminal AC measurement removes the influence of test wire and contact resistance, to get more precise internal resistance data.
Q: Can I test the battery while it is still working?
A: Yes, it supports live on-line measurement, no need to shut down UPS or battery system.
Q: What is the difference between UT677A+ and UT677C?
A: UT677A+ max voltage is 70V; UT677C supports up to 120V, for higher voltage battery packs.
Q: Does it support data export?
A: Yes, save up to 500 records. Connect via Bluetooth APP or Type‑C to PC software for checking and printing reports.
Q: What is the anti-noise function?
A: It automatically shifts test frequency between 920Hz-1080Hz to avoid ambient electrical noise, stable measurement in industrial sites.
Technical Specifications | |||
Function | UT677A+ | UT677C | Resolution |
Battery Internal resistance | 0.000mΩ~3 mΩ / ±1 % fs. ±20 dgt | 0.000mΩ~3 mΩ / ±1 % fs. ±20 dgt | 1 μ Ω |
3.000mΩ~30 mΩ / ±0.5 % fs. ±15 dgt. | 3.000mΩ~30 mΩ / ±0.5 % fs. ±15 dgt. | 10 μΩ | |
3.000mΩ~300 mΩ / ±0.5 % fs. ±15 dgt. | 3.000mΩ~300 mΩ / ±0.5 % fs. ±15 dgt. | 100 μΩ | |
300mΩ~3 Ω / ±0.5 % fs. ±15 dgt. | 300mΩ~3 Ω / ±0.5 % fs. ±15 dgt. | 1mΩ | |
Battery Voltage range: | 0.000V~±7 V / ±0.2 % fs. ±10 dgt. | 0.000V~±7 V / ±0.2 % fs. ±10 dgt. | 1 mV |
7 V~±71.00V/ ±0.2 % fs. ±10 dgt. | 7 V~100.00V/ ±0.2 % fs. ±10 dgt | 10 mV | |
N/A | 100V~120.00V/ ±0.2 % fs. ±10 dgt | 100 mV | |
Features | |||
Function | 1, Battery internal resistance measurement; | ||
Battery types | Lead-acid battery, lithium battery, and other types of batteries. | ||
Measurement methods | Internal resistance: 1kHz AC 4-terminal test method; | ||
Test Current：2.0mA~200mA (Varying range correspond to varying test currents. | |||
refresh rate：5 times/s | |||
Anti interference | Yes, Automatic frequency tuning: 920Hz~1080Hz | ||
Power supply | DC 11.1V lithium battery 2600mAh | ||
Max input voltage | DC 120V (between positive side and negative side) | ||
Response time | 200ms | ||
Screen | 3.5″（480*320 color screen） | ||
Meter dimension | 170mm×115mm×65mm (L*W*H) | ||
Data interface | Type C, save the testing data and upload it to PC | ||
Bluetooth | YES | ||
Data hold | Auto/Manual data hold | ||
Data storage | 500 sets | ||
Measurement judgment function | PASS, WARNING, FAIL judgment thresholds can be preset | ||
Low battery indication | YES, 5 battery level | ||
Auto power off | YES, Around 15 minutes | ||
Weight(meter) | 674.0g (batteries included) | ||
Accuracy Guaranteed Temperature Humidity | 23℃±5℃, <75%rh | ||
Working temperature | -10℃～40℃；below 80%RH | ||
Storage temperature | -20℃～60℃；below 70%RH | ||
Puncture test | AC 3700V/RMS(between circuit and case) | ||
External magnetic field | ＜40A/m | ||
Suitable for safety regulations | IEC 61010; CE certificated | ||
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