1. ആമുഖം
The UNI-T UT271A is a professional clamp-on ground resistance tester and AC leakage current clamp meter. It is designed for accurate measurement of ground resistance, loop resistance, and AC leakage current in various electrical systems. This manual provides essential information for the safe and effective operation, maintenance, and troubleshooting of the device.
പ്രധാന സവിശേഷതകൾ:
- Ground resistance test, loop resistance test, leakage current test.
- Resistance Resolution: 0.001Ω; Current Resolution: 0.01mA.
- Jaw Size: Φ32mm, suitable for most grounding busbars.
- Ω+A Synchronous display on the same screen.
- 4-bit LCD digital display (46mm x 36mm).
- Storage of up to 500 sets of data.
- Quick self-check on startup.
- Full automatic gear shifting.
- Rapid measurement: 1 measurement per second.
ചിത്രം 1.1: കഴിഞ്ഞുview of UNI-T UT271A key features and specifications.
2 സുരക്ഷാ വിവരങ്ങൾ
WARNING: Read all safety warnings and instructions before using this product. Failure to follow the warnings and instructions may result in electric shock, fire, or serious injury.
- Always adhere to local and national safety regulations for electrical work.
- Do not use the device if it appears damaged or if the insulation is compromised.
- Ensure the battery compartment is securely closed before operation.
- Do not operate the device in wet environments or explosive atmospheres.
- Avoid touching the circuit under test with bare hands.
- The device is rated for IEC61010-1 (CATII 300V, CATIV 150V, pollution level 2) and IEC61030-031 (Grounding Resistance).
- Refer to JGJ 1054-2009 Verification Regulations for Clamp on Grounding Resistance Meter.
3. ഉൽപ്പന്നം കഴിഞ്ഞുview
The UT271A features a robust clamp design for non-contact measurements. The front panel includes a digital LCD display, function buttons, and the clamp jaw. The rear panel typically contains battery access and regulatory markings.
ചിത്രം 3.1: മുൻഭാഗം view of the UNI-T UT271A Ground Resistance Tester, showing the display, buttons, and clamp താടിയെല്ല്.
ചിത്രം 3.2: പിന്നിലേക്ക് view of the UNI-T UT271A, indicating the battery compartment and warning labels.
ചിത്രം 3.3: ക്ലോസ്amp meter with its jaw open, demonstrating the Φ32mm opening for conductor insertion.
4. സജ്ജീകരണം
4.1 ബാറ്ററി ഇൻസ്റ്റാളേഷൻ
- ഉപകരണം ഓഫാണെന്ന് ഉറപ്പാക്കുക.
- ഉപകരണത്തിന്റെ പിൻഭാഗത്ത് ബാറ്ററി കമ്പാർട്ട്മെന്റ് കണ്ടെത്തുക.
- ബാറ്ററി കമ്പാർട്ട്മെൻ്റ് കവർ തുറക്കുക.
- Insert four No.5 alkaline dry batteries (DC 6V, LR6 1.5V x 4), observing correct polarity.
- ബാറ്ററി കമ്പാർട്ട്മെൻ്റ് കവർ സുരക്ഷിതമായി അടയ്ക്കുക.
4.2 പ്രാരംഭ പവർ-ഓൺ
Press the power button to turn on the device. The meter will perform a quick self-check on startup. Ensure the display shows normal readings before proceeding with measurements.
5. പ്രവർത്തന നിർദ്ദേശങ്ങൾ
5.1 Measuring Ground Resistance and Loop Resistance
- ഉപകരണം ഓണാക്കുക.
- cl തുറക്കുകamp ട്രിഗർ അമർത്തി താടിയെല്ല്.
- cl സ്ഥാപിക്കുകamp around the grounding conductor or loop to be measured. Ensure the conductor is centered within the jaw and the jaw is fully closed.
- The device will automatically select the appropriate range and display the resistance value in Ohms (Ω).
- For models UT271B and UT271C, the display may show Ω+A synchronously.
5.2 Measuring AC Leakage Current
- ഉപകരണം ഓണാക്കുക.
- cl തുറക്കുകamp താടിയെല്ല്.
- cl സ്ഥാപിക്കുകamp around the conductor carrying the AC current to be measured. Ensure the jaw is fully closed.
- The device will display the AC leakage current value in Ampഈറസ് (എ).
Image 5.1: Demonstrating the use of the Φ32mm circular jaw for measuring ground resistance on a rebar.
ചിത്രം 5.2: ഉദാamples of applications including power engineering, tower resistance measurement, charging pile resistance, measurement of AC current, and measurement of leakage current.
5.3 ഡാറ്റ ഹോൾഡ് പ്രവർത്തനം
അമർത്തുക പിടിക്കുക button to freeze the current reading on the display. Press it again to release the hold function and resume live measurements.
5.4 Data Storage Function
The device supports storage of up to 500 sets of data. Press the എം.ഇ.എം button to save the current measurement. Refer to the on-screen indicators for memory status and navigation. Consult the full product manual for detailed instructions on recalling and managing stored data.
6. പരിപാലനം
6.1 വൃത്തിയാക്കൽ
Wipe the device with a dry, soft cloth. Do not use abrasive cleaners or solvents. Ensure no moisture enters the device.
6.2 സംഭരണം
When not in use for extended periods, remove the batteries to prevent leakage. Store the device in a cool, dry place, away from direct sunlight and extreme temperatures (-20°C to 60°C, <80%RH).
7. പ്രശ്നപരിഹാരം
- No Display/Low Battery: If the display is blank or shows a low battery indicator, replace the batteries. The device provides a low battery voltagഇ പ്രോംപ്റ്റ്.
- കൃത്യമല്ലാത്ത വായനകൾ: cl ഉറപ്പാക്കുകamp jaw is fully closed and the conductor is properly positioned. Check for any external interference. The device automatically identifies interference signals and indicates when interference is high.
- ഉപകരണം പ്രതികരിക്കുന്നില്ല: Try turning the device off and on again. If the issue persists, replace the batteries.
For further assistance, contact UNI-T customer support.
8 സ്പെസിഫിക്കേഷനുകൾ
The following table details the technical specifications for the UT271A, UT271B, and UT271C models.
Image 8.1: Detailed technical specifications for the UT271 series.
| ഫംഗ്ഷൻ | പരിധി | റെസലൂഷൻ | കൃത്യത | UT271A | UT271B | UT271C |
|---|---|---|---|---|---|---|
| പ്രതിരോധം | 0.01Ω-0.099Ω | 0.001Ω | ± (1%rdg+0.01Ω) | √ | √ | √ |
| 0.10Ω-0.99Ω | 0.01Ω | ± (1%rdg+0.01Ω) | √ | √ | √ | |
| 1.0Ω-49.9Ω | 0.1Ω | ± (1%rdg+0.1Ω) | √ | √ | √ | |
| 50.0Ω-99.5Ω | 0.5Ω | ± (1.5%rdg+0.5Ω) | √ | √ | √ | |
| 100Ω-199Ω | 1Ω | ± (2%rdg+1Ω) | √ | √ | √ | |
| 200Ω-395Ω | 5Ω | ± (5%rdg+5Ω) | √ | √ | √ | |
| നിലവിലുള്ളത് | 0.00mA-9.99mA | 0.01mA | ± (2.5%rdg+1mA) | √ | √ | √ |
| 10.0mA-99.9mA | 0.1mA | ± (2.5%rdg+5mA) | √ | √ | √ | |
| 100mA-299mA | 1mA | ± (2.5%rdg+10mA) | √ | √ | √ | |
| 0.30A-2.99A | 0.01എ | ± (2.5%rdg+0.1A) | - | √ | √ | |
| 3.0A-9.9A | 0.1എ | ± (2.5%rdg+0.3A) | - | √ | √ | |
| വൈദ്യുതി വിതരണം | DC 6V, No.5 alkaline dry battery (LR6 1.5V x 4) | |||||
| താടിയെല്ലിന്റെ വലിപ്പം | Φ32 മി.മീ | |||||
| Ω+A Display | Support (only UT271B, UT271C) | |||||
| ഡാറ്റ സംഭരണം | 500 സെറ്റുകൾ | |||||
| ഇടപെടൽ പരിശോധന | Automatically identify interference signals, indicated by the "Noise" symbol when the interference current is high | |||||
| ബാറ്ററി വോളിയംtage | കുറഞ്ഞ ബാറ്ററി വോള്യംtagഇ പ്രോംപ്റ്റ് | |||||
| വൈദ്യുതി മാലിന്യം | Max is about 60mA | |||||
| സമയം അളക്കുക | സെക്കന്റിൽ ഒരിക്കൽ | |||||
| LCD വലിപ്പം | 46 മിമി x 36 മിമി | |||||
| ഹോസ്റ്റ് വലുപ്പം | 260mm x 105mm x 60mm | |||||
| ഇൻസുലേഷൻ | 20MΩ | |||||
| സമ്മർദ്ദ പ്രതിരോധം | എസി 3700V/rms | |||||
| ഭാരം | 818 ഗ്രാം | |||||
| ഓപ്പറേഷൻ | -10°C~40°C; 70%RH | |||||
| സംഭരണം | -20°C~60°C; 80%RH | |||||
| കാന്തിക മണ്ഡലം | <40A/m; <1V/m | |||||
| സുരക്ഷാ ചട്ടങ്ങൾ | IEC61010-1 (CATII 300V, CATIV 150V, pollution level 2); IEC61030-031; IEC61557-1 (Grounding Resistance); JJG 1054-2009 Verification Regulations for Clamp on Grounding Resistance Meter | |||||
9. ഉൽപ്പന്ന ആക്സസറികൾ
The following items are included with your UNI-T UT271A Ground Resistance Tester:
Image 9.1: Contents of the UNI-T UT271A package, including the instrument, test loops, cloth bag, and instruction manual.
- UNI-T UT271A Instrument: 1 unit
- Standard Test Loops: 1Ω, 10Ω (1 unit each)
- Cloth Bag: 1 PCS
- Instruction Manual: 1 PCS
- Warranty Card/Certificate of Conformity: 1 PCS
10. വാറൻ്റിയും പിന്തുണയും
10.1 വാറൻ്റി വിവരങ്ങൾ
Your UNI-T UT271A comes with a warranty card/certificate of conformity. Please refer to this document for specific warranty terms and conditions, including coverage period and service procedures. Keep your purchase receipt as proof of purchase.
10.2 ഉപഭോക്തൃ പിന്തുണ
For technical support, service, or inquiries regarding your UNI-T product, please visit the official UNI-T website or contact their authorized service centers. Contact information can typically be found on the warranty card or the UNI-T official webസൈറ്റ്.
