Manual Pengguna Kit Penguji Rintangan Bumi Extech 382252

1. Pengenalan

The Extech 382252 is a comprehensive Earth Ground Resistance Tester Kit designed for accurate measurement of earth ground resistance. This kit provides three selectable ranges for earth ground resistance: 20 Ohms (Ω), 200 Ohms (Ω), and 2000 Ohms (Ω). Beyond earth ground testing, the device also functions as a multimeter, capable of measuring AC/DC Voltage, Resistance, and Continuity. It features automatic zero adjustment for ease of use. This manual provides detailed instructions for the safe and effective operation, maintenance, and troubleshooting of your Extech 382252.

2. Maklumat Keselamatan

Amaran: Improper use of this meter can cause damage, shock, injury, or death. Read and understand all safety information and operating instructions before using this instrument. Always adhere to local and national safety codes.

• Jangan melebihi had input maksimum untuk sebarang fungsi.
• Exercise extreme caution when working with live electrical circuits.
• Ensure the meter is in good working condition and free from damage before use.
• Sentiasa gunakan fungsi dan julat yang betul untuk pengukuran.
• Gantikan bateri apabila penunjuk bateri rendah muncul untuk memastikan bacaan yang tepat.
• Keep hands and fingers away from test probe tips when making measurements.
• Do not operate the meter in explosive atmospheres or in the presence of flammable gases or dust.

3. Kandungan Pakej

Sahkan bahawa semua item ada dan tidak rosak semasa membongkar:

• Extech 382252 Earth Ground Resistance Tester
• Test Leads (set)
• Auxiliary Earth Bars (2 pieces)
• Membawa Sarung
• Protective Rubber Holster
• 1.5V AA Batteries (6 pieces)

Image 1: The Extech 382252 Earth Ground Resistance Tester Kit, showing the main unit, test leads, two auxiliary earth bars, and the carrying case.

4. Ciri-ciri Produk

The Extech 382252 offers the following key features:

• Earth Ground Resistance measurement in three ranges: 20Ω, 200Ω, and 2000Ω.
• AC / DC Voltage measurement capabilities.
• Resistance and Continuity testing functions.
• Automatic zero adjustment for accurate readings.
• Paparan LCD yang besar dan senang dibaca.
• Data Hold function to freeze displayed readings.
• Lampu latar untuk keterlihatan dalam keadaan cahaya malap.
• Durable protective rubber holster.

Imej 2: Depan view of the Extech 382252 Earth Ground Resistance Tester, highlighting its display, function dial, and control buttons.

5. Persediaan

5.1 Pemasangan Bateri

1. Pastikan meter dimatikan.
2. Cari penutup petak bateri di bahagian belakang meter.
3. Use a screwdriver to remove the screw(s) securing the cover.
4. Insert six (6) 1.5V AA batteries, observing correct polarity (+/-).
5. Gantikan penutup petak bateri dan kencangkannya dengan skru.

5.2 Menghubungkan Petunjuk Ujian

Connect the test leads to the appropriate input jacks on the meter for the desired measurement function. For earth ground resistance testing, specific connections involving the auxiliary earth bars will be detailed in the operating instructions.

6. Arahan Operasi

6.1 Hidupkan/Mati Kuasa

Rotate the function dial from the 'OFF' position to any desired measurement function to power on the meter. To power off, rotate the dial back to the 'OFF' position.

6.2 Automatic Zero Adjustment

The meter features automatic zero adjustment. When selecting a resistance range, the meter will automatically adjust to zero, compensating for lead resistance. Ensure test leads are not shorted or open during this process for accurate zeroing.

6.3 Fungsi Pegangan Data

Press the 'HOLD' button to freeze the current reading on the display. Press it again to release the hold and resume live readings.

6.4 Fungsi Lampu Latar

Press the backlight button (often indicated by a light bulb icon) to illuminate the display for better visibility in dark environments. Press it again to turn off the backlight.

7. Earth Ground Resistance Measurement

The Extech 382252 uses the 3-wire (or Fall-of-Potential) method for earth ground resistance measurements. This method requires the use of the two auxiliary earth bars provided.

7.1 Measurement Procedure (3-Wire Method)

1. Penyediaan: Ensure the circuit under test is de-energized and safely isolated.
2. Placement of Auxiliary Earth Bars:
   • Drive the first auxiliary earth bar (P) into the ground at a suitable distance from the earth electrode (E) being tested.
   • Drive the second auxiliary earth bar (C) into the ground at a further distance from P, ensuring all three points (E, P, C) are in a straight line. Typical distances are 5-10 meters (15-30 feet) between E and P, and P and C, but may vary based on soil conditions and electrode size.
3. Menghubungkan Petunjuk Ujian:
   • Connect the 'E' terminal of the meter to the earth electrode under test.
   • Connect the 'P' terminal of the meter to the first auxiliary earth bar (P).
   • Connect the 'C' terminal of the meter to the second auxiliary earth bar (C).
4. Pilih Julat: Rotate the function dial to the desired Earth Ground Resistance range (20Ω, 200Ω, or 2000Ω). Start with the highest range if the resistance value is unknown.
5. Lakukan Ujian: Press the 'TEST' button. The meter will inject a current and measure the voltage drop to calculate the earth ground resistance.
6. Baca Pengukuran: The resistance value will be displayed on the LCD.
7. Sahkan Ketepatan: For critical measurements, it is recommended to repeat the test with the auxiliary earth bars placed at slightly different distances to ensure the reading is stable and accurate.

8. Other Measurements

8.1 AC/DC Jldtage Pengukuran

1. Connect the red test lead to the 'V' input jack and the black test lead to the 'COM' input jack.
2. Rotate the function dial to the desired ACV (750V AC) or DCV (1000V DC) range.
3. Sambungkan kuar ujian merentasi litar atau komponen yang hendak diukur.
4. Baca voltagnilai e pada paparan.

8.2 Pengukuran Rintangan

1. Pastikan litar atau komponen dinyahtenagakan.
2. Connect the red test lead to the 'V' input jack and the black test lead to the 'COM' input jack.
3. Rotate the function dial to the desired Resistance range (e.g., 200Ω, 20kΩ, 200kΩ).
4. Sambungkan kuar ujian merentasi komponen.
5. Baca nilai rintangan pada paparan.

8.3 Ujian Kesinambungan

1. Pastikan litar atau komponen dinyahtenagakan.
2. Connect the red test lead to the 'V' input jack and the black test lead to the 'COM' input jack.
3. Rotate the function dial to the Continuity position (often indicated by a speaker icon).
4. Sambungkan prob ujian merentasi komponen atau wayar.
5. An audible beep indicates continuity (low resistance). The display will show the resistance value.

9. Penyelenggaraan

9.1 Pembersihan

Wipe the meter with a dry, soft cloth. Do not use abrasives or solvents. Periodically clean the test leads and probes to ensure good electrical contact.

9.2 Penggantian Bateri

Apabila penunjuk bateri rendah muncul pada paparan, gantikan bateri dengan segera untuk mengekalkan ketepatan pengukuran. Rujuk Bahagian 5.1 untuk arahan pemasangan bateri.

9.3 Penyimpanan

If the meter is to be stored for an extended period, remove the batteries to prevent leakage and damage. Store the meter in its carrying case in a cool, dry environment, away from direct sunlight and extreme temperatures.

10. Penyelesaian masalah

• No Display/Meter Not Powering On: Check battery installation and ensure batteries are fresh. Verify the function dial is not in the 'OFF' position.
• Bacaan Tidak Tepat: Ensure test leads are properly connected and not damaged. Check battery level. For earth ground resistance, verify proper placement and connection of auxiliary earth bars and ensure good contact with the ground.
• Tiada Bip Kesinambungan: Check if the circuit is truly continuous. Ensure test leads are making good contact.
• Display Shows 'OL' (Overload): Nilai yang diukur melebihi julat yang dipilih. Beralih ke julat yang lebih tinggi.

Jika masalah berterusan selepas mengikuti langkah-langkah ini, hubungi khidmat pelanggan.

11. Spesifikasi

12. Waranti

The Extech 382252 Earth Ground Resistance Tester Kit typically comes with a Waranti terhad 1 tahun from the date of purchase. This warranty covers defects in materials and workmanship under normal use. It does not cover damage resulting from misuse, accident, unauthorized repair, or modification. Please retain your proof of purchase for warranty claims.

13. Sokongan

For technical assistance, calibration services, or further information regarding your Extech 382252, please refer to the official Extech website or contact their customer support department. Contact details can usually be found on the manufacturer's webtapak atau dalam dokumentasi yang disertakan dengan produk anda.