1. Ifihan
Thank you for choosing the NJTy T-6125 Digital Isolation Tester. This device is a professional-grade instrument designed for accurate measurement of insulation resistance, absorption ratio, polarization index, AC voltage, and low resistance. It features a high-performance integrated circuit, wide measurement range, and multiple test voltage levels, making it an essential tool for electricians and maintenance technicians. This manual provides detailed instructions for safe and effective operation, maintenance, and troubleshooting.

olusin 1: Iwaju view of the NJTy T-6125 Digital Isolation Tester, showing the large LCD display and control dial.
2. Alaye Aabo
Please read and understand all safety warnings and operating instructions before using this instrument. Failure to follow these instructions may result in electric shock, fire, or serious injury.
- Rí i dájú pé ẹ̀rọ náà wà ní ipò tó dára kí o tó lò ó. Má ṣe lò ó bí ó bá bàjẹ́.
- Do not operate the tester in wet environments or explosive atmospheres.
- Wear appropriate personal protective equipment (PPE), such as insulated gloves and safety glasses, when performing electrical measurements.
- Verify that the circuit under test is de-energized before connecting or disconnecting test leads, unless performing live voltage measurements as specified.
- Má ṣe kọjá ìwọ̀n ìtẹ̀síwájú tó pọ̀ jùlọ fún ìpele ìpeletage ati lọwọlọwọ.
- Rí i dájú pé ibi tí batiri wà ti sé dáadáa kí o tó ṣiṣẹ́.
- Refer to the warning label on the back of the device: "TO AVOID ELECTRICAL SHOCK, REMOVE TEST LEADS BEFORE OPENING CASE. READ OPERATING MANUAL."
3. Ọja Ipariview
3.1 Key Awọn ẹya ara ẹrọ
- Opodiwọn: Measures insulation resistance, absorption ratio (DAR), polarization index (PI), AC voltage, and low resistance.
- Iṣe to gaju: Professional-grade integrated circuit design with wide measurement range and high output power.
- Multiple Test Voltages: Offers 100V, 250V, 500V, 1000V, and 2500V test voltage options for insulation resistance.
- Ìfihàn Ọ̀rẹ́ oníṣe: Large LCD screen with grey-white backlight for easy readability.
- Isakoso data: Features measurement data retention (HOLD), excessive alarm, and automatic shutdown.
- Ikole ti o tọ: Designed to be shock-resistant and dust-proof, suitable for various electrical equipment testing.
- Automatic Discharge: Includes an automatic discharge function after insulation resistance testing.
3.2 Irinše ati Awọn ẹya ẹrọ

Figure 2: The NJTy T-6125 Isolation Tester shown with its carrying case, test leads, and alligator clips.
Ni igbagbogbo package naa pẹlu:
- NJTy T-6125 Digital Isolation Tester
- Test Leads (Red, Black, Green)
- Awọn agekuru Alligator
- Ọran gbigbe
- Afowoyi Olumulo (iwe-ipamọ yii)

Figure 3: Detail showing the large backlit LCD display and the robust, anti-fall plastic shell design of the T-6125.
4. Eto
4.1 Fifi sori batiri
- Rí i dájú pé ẹ̀rọ náà ti pa, àti pé gbogbo àwọn èdìdì ìdánwò ni a ti ge kúrò.
- Wa ideri iyẹwu batiri ni ẹhin oluyẹwo.
- Lo screwdriver lati ṣii ideri iyẹwu batiri naa.
- Insert 8 x 1.5V AA batteries, observing the correct polarity (+/-) as indicated inside the compartment.
- Securely close the battery compartment cover and fasten the screws.

olusin 4: Ẹyìn view of the T-6125, highlighting the battery compartment cover.

Figure 5: The open battery compartment, showing the slots for 8 AA batteries.
4.2 Nsopọ Awọn itọsọna Igbeyewo
Connect the test leads to the appropriate input terminals on the tester. Ensure a secure connection before proceeding with any measurements.
5. Awọn ilana Iṣiṣẹ
5.1 Titan / Pa a
- To power on, rotate the central rotary switch from the "OFF" position to the desired measurement function.
- To power off, rotate the central rotary switch to the "OFF" position.
- The device features an automatic shutdown function after 30 minutes of inactivity to conserve battery life.

Figure 6: Illustration of the 30-minute automatic shutdown feature for battery conservation.
5.2 Idabobo Idiwon Resistance
- Rí i dájú pé a ti dín agbára ìṣiṣẹ́ tí a ń dán wò kù, a sì ti yọ ọ́ kúrò láìléwu.
- Connect the test leads to the circuit or component to be tested.
- Rotate the central switch to one of the insulation resistance test voltage settings (e.g., 250V, 500V, 1000V, 2500V).
- Tẹ awọn Idanwo button to initiate the measurement. The display will show the insulation resistance value.
- After the test, the device will automatically discharge the circuit.
- Tẹ awọn DIMU button to retain the displayed measurement. Press again to release.
5.3 Absorption Ratio (DAR) and Polarization Index (PI) Measurement
- Follow steps 1-3 for insulation resistance measurement.
- Rotate the central switch to the "DAR/PI" position.
- Tẹ awọn Idanwo button. The device will perform timed insulation resistance measurements to calculate DAR and PI.
- The results will be displayed sequentially.
5.4 AC Voltage Idiwon
- So awọn asiwaju igbeyewo si AC voltage orisun.
- Rotate the central switch to the "ACV" position.
- Awọn AC voltage yoo han loju iboju.
5.5 Ìwọ̀n Ìdènà Kéré Jù
- Rí i dájú pé agbára ìṣiṣẹ́ tí a ń dán wò kò pọ̀.
- Connect the test leads to the component for low resistance measurement.
- Rotate the central switch to the "Low Resistance" position (indicated by Ω).
- Iye resistance yoo han.

Figure 7: The T-6125 being used in diverse applications such as industrial control panels, telecommunication towers, circuit boards, and automotive electrical systems.
6. Itọju
- Ninu: Lo asọ, damp Aṣọ láti fi nu ìta ẹ̀rọ náà. Má ṣe lo àwọn ohun ìfọṣọ tàbí àwọn ohun èlò ìfọṣọ.
- Rirọpo Batiri: Replace batteries promptly when the low battery indicator appears. Always use new, identical batteries.
- Ibi ipamọ: Tí o kò bá lò ó fún ìgbà pípẹ́, yọ àwọn bátìrì náà kúrò kí ó má baà jò. Tọ́jú ẹ̀rọ náà sí ibi tí ó tutù, tí ó gbẹ, tí kò sí ìmọ́lẹ̀ oòrùn tààrà àti ooru tó le koko.
- Iṣatunṣe: For professional use, periodic calibration by qualified personnel is recommended to ensure accuracy.
7. Laasigbotitusita
| Isoro | Owun to le Fa | Ojutu |
|---|---|---|
| Ẹrọ naa ko ṣiṣẹ. | Awọn batiri ti o ku tabi ti ko tọ ti fi sori ẹrọ. | Check battery polarity and replace with new batteries if necessary. |
| Awọn kika ti ko pe. | Poor test lead connection, dirty terminals, or device needs calibration. | Ensure test leads are securely connected. Clean terminals. Consider professional calibration. |
| Ifihan ti wa ni baibai tabi flicker. | Agbara batiri kekere. | Rọpo gbogbo awọn batiri. |
| Ẹ̀rọ náà máa ń pa láìròtẹ́lẹ̀. | Automatic shutdown due to inactivity, or low battery. | This is a normal feature after 30 minutes of inactivity. If it happens during active use, replace batteries. |
8. Awọn pato
| Paramita | Iye |
|---|---|
| Awoṣe | T-6125 |
| Ohun elo | ABS |
| Insulation Test Measurement Range | 0.01MΩ ~ 200.0 GΩ |
| Idanwo idabobo Voltages | 100V, 250V, 500V, 1000V, 2500V |
| Insulation Test Output Voltage Yiye | ± 10% |
| Insulation Test Short-Circuit Current | O fẹrẹ to 2 mA |
| Laifọwọyi Išẹ Sisọ | Bẹẹni |
| Ibi ipamọ otutu | -20 ℃ ~ 60 ℃ |
| Awọn ipo Ṣiṣẹ | 0 ℃ ~ 40 ℃ |
| Giga | 2000m |
| Ọriniinitutu ibatan | 40% ~ 75% |
| Ibi ti ina elekitiriki ti nwa | Awọn batiri 8 x 1.5V AA (kii ṣe pẹlu) |
| Package Mefa | 22 x 19 x 9 cm |
| Iwọn | 923 giramu |
| Olupese | EVTSCAN |
| Ilu isenbale | China |
9. Atilẹyin ọja ati Support
For warranty information and technical support, please refer to the documentation provided at the time of purchase or contact your retailer. Specific warranty terms may vary by region and seller.