Extech 382252 Earth Ground Resistance Tester Kit User Manual

1. Муқаддима

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. Маълумот оид ба бехатарӣ

Огоҳӣ: 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.

• Аз ҳадди ниҳоии вуруд барои ягон функсия зиёд накунед.
• Exercise extreme caution when working with live electrical circuits.
• Ensure the meter is in good working condition and free from damage before use.
• Барои андозагирӣ ҳамеша функсия ва диапазони дурустро истифода баред.
• Вақте ки нишондиҳандаи камии батарея пайдо мешавад, батареяҳоро иваз кунед, то хондани дақиқро таъмин кунед.
• Keep hands and fingers away from test probe tips when making measurements.
• Ҳисобкунакро дар атмосфераи тарканда ё дар ҳузури газҳои оташгиранда ё чанг истифода набаред.

3. Мундариҷаи баста

Боварӣ ҳосил кунед, ки ҳама ашё ҳангоми кушодан мавҷуд ва осеб надидаанд:

• Extech 382252 Earth Ground Resistance Tester
• Test Leads (set)
• Auxiliary Earth Bars (2 pieces)
• Қуттии интиқол
• Ғилофи резинии муҳофизатӣ
• 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. Хусусиятҳои маҳсулот

The Extech 382252 offers the following key features:

• Earth Ground Resistance measurement in three ranges: 20Ω, 200Ω, and 2000Ω.
• Ҷилди AC/DCtage measurement capabilities.
• Resistance and Continuity testing functions.
• Automatic zero adjustment for accurate readings.
• Дисплейи калон, барои хондан LCD.
• Data Hold function to freeze displayed readings.
• Чароғаки қафо барои намоёнӣ дар шароити камравшанӣ.
• Durable protective rubber holster.

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

5. Танзимот

5.1 Насби батарея

1. Боварӣ ҳосил кунед, ки ҳисобкунак хомӯш аст.
2. Сарпӯши батареяро дар қафои ҳисобкунак пайдо кунед.
3. Use a screwdriver to remove the screw(s) securing the cover.
4. Insert six (6) 1.5V AA batteries, observing correct polarity (+/-).
5. Сарпӯши қисмати батареяро иваз кунед ва онро бо винт(ҳо) маҳкам кунед.

5.2 Пайваст кардани рахҳои санҷишӣ

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. Дастурҳои истифодабарӣ

6.1 Фаъол кардан/хомӯш кардан

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 Функсияи нигоҳдории маълумот

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 Функсияи рӯшноӣ

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. Тайёрӣ: Боварӣ ҳосил кунед, ки схемаи озмоишшуда аз энергия ҷудо карда шудааст ва бехатар ҷудо карда шудааст.
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. Пайваст кардани рахҳои санҷишӣ:
   • 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. Диапазон интихоб кунед: 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. Санҷишро иҷро кунед: Press the 'TEST' button. The meter will inject a current and measure the voltage drop to calculate the earth ground resistance.
6. Андозаро хонед: The resistance value will be displayed on the LCD.
7. Санҷиши дақиқ: 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 ҷилдtage андозагирӣ

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. Санҷишҳои санҷиширо тавассути схема ё ҷузъе, ки чен карда мешавад, пайваст кунед.
4. Ҷилди хонедtagарзиши e дар экран.

8.2 Андозаи муқовимат

1. Боварӣ ҳосил кунед, ки схема ё ҷузъ аз барқ ​​​​хомуш карда шудааст.
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. Зондҳои санҷиширо дар тамоми қисм пайваст кунед.
5. Арзиши муқовиматро дар экран хонед.

8.3 Санҷиши давомнокӣ

1. Боварӣ ҳосил кунед, ки схема ё ҷузъ аз барқ ​​​​хомуш карда шудааст.
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. Зондҳои санҷиширо дар байни қисм ё сим пайваст кунед.
5. Садои сигнали садоӣ давомнокӣ (муқовимати паст) -ро нишон медиҳад. Намоиш арзиши муқовиматро нишон медиҳад.

9. Нигоҳдорӣ

9.1 Тозакунӣ

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 Иваз кардани батарея

Вақте ки дар дисплей нишондиҳандаи кам будани батарея пайдо мешавад, барои нигоҳ доштани дақиқии андозагирӣ батареяҳоро фавран иваз кунед. Барои дастурҳои насби батарея ба бахши 5.1 нигаред.

9.3 Нигоҳдорӣ

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. Баррасии мушкилот

• No Display/Meter Not Powering On: Check battery installation and ensure batteries are fresh. Verify the function dial is not in the 'OFF' position.
• Хонишҳои нодуруст: 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.
• Бе садои давомдор: Check if the circuit is truly continuous. Ensure test leads are making good contact.
• Намоиши 'OL' (бори изофа): Қимати ченшуда аз диапазони интихобшуда зиёдтар аст. Ба диапазони баландтар гузаред.

Агар пас аз иҷрои ин қадамҳо мушкилот боқӣ монад, бо хадамоти дастгирии муштариён тамос гиред.

11. Мушаххасоти

12. Кафолат

The Extech 382252 Earth Ground Resistance Tester Kit typically comes with a Кафолати маҳдуди 1 сол 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. Дастгирӣ

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 webсайт ё ҳуҷҷатҳое, ки ба маҳсулоти шумо дохил карда шудаанд.