„Extech 382252“ įžeminimo varžos testerio komplektas, naudotojo vadovas

1. Įvadas

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. Saugos informacija

Įspėjimas: 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.

• Neviršykite jokių funkcijų maksimalių įvesties ribų.
• Dirbdami su elektros grandinėmis, tekančiomis įtampa, būkite itin atsargūs.
• Ensure the meter is in good working condition and free from damage before use.
• Matavimams visada naudokite tinkamą funkciją ir diapazoną.
• Kad užtikrintumėte tikslius rodmenis, pakeiskite baterijas, kai pasirodys išsikrovusių baterijų indikatorius.
• 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. Pakuotės turinys

Išpakuodami patikrinkite, ar visos prekės yra ir nepažeistos:

• Extech 382252 Earth Ground Resistance Tester
• Test Leads (set)
• Auxiliary Earth Bars (2 pieces)
• Dėklas nešiojimui
• Apsauginis guminis dėklas
• 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. Produkto ypatybės

The Extech 382252 offers the following key features:

• Earth Ground Resistance measurement in three ranges: 20Ω, 200Ω, and 2000Ω.
• AC/DC ttagelektroninių matavimo galimybių.
• Resistance and Continuity testing functions.
• Automatic zero adjustment for accurate readings.
• Didelis, lengvai skaitomas LCD ekranas.
• Duomenų laikymo funkcija rodomiems rodmenims užfiksuoti.
• Backlight for visibility in low-light conditions.
• Durable protective rubber holster.

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

5. Sąranka

5.1 Akumuliatoriaus įdėjimas

1. Įsitikinkite, kad skaitiklis yra išjungtas.
2. Suraskite baterijų skyriaus dangtelį matuoklio gale.
3. Use a screwdriver to remove the screw(s) securing the cover.
4. Insert six (6) 1.5V AA batteries, observing correct polarity (+/-).
5. Uždėkite baterijų skyriaus dangtelį ir pritvirtinkite jį varžtu (-ais).

5.2 Bandymo laidų prijungimas

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. Naudojimo instrukcijos

6.1 Maitinimo įjungimas/išjungimas

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 Duomenų sulaikymo funkcija

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 Foninio apšvietimo funkcija

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. Paruošimas: 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. Bandymo laidų prijungimas:
   • 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. Pasirinkite diapazoną: 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. Atlikite testą: Press the 'TEST' button. The meter will inject a current and measure the voltage drop to calculate the earth ground resistance.
6. Skaitykite matavimą: The resistance value will be displayed on the LCD.
7. Patikrinkite tikslumą: 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 ttage Matavimas

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. Prijunkite bandymo zondus prie matuojamos grandinės arba komponento.
4. Perskaitykite ttage reikšmė ekrane.

8.2 Atsparumo matavimas

1. Įsitikinkite, kad grandinė arba komponentas yra atjungtas nuo įtampos.
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. Prijunkite bandymo zondus prie komponento.
5. Perskaitykite pasipriešinimo vertę ekrane.

8.3 Tęstinumo testas

1. Įsitikinkite, kad grandinė arba komponentas yra atjungtas nuo įtampos.
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. Prijunkite bandymo zondus prie komponento arba laido.
5. An audible beep indicates continuity (low resistance). The display will show the resistance value.

9. Priežiūra

9.1 Valymas

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 Akumuliatoriaus keitimas

Kai ekrane pasirodo išsikrovusio baterijų indikatorius, nedelsdami pakeiskite baterijas, kad išlaikytumėte matavimo tikslumą. Baterijų įdėjimo instrukcijas rasite 5.1 skyriuje.

9.3 Saugykla

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. Problemų sprendimas

• No Display/Meter Not Powering On: Check battery installation and ensure batteries are fresh. Verify the function dial is not in the 'OFF' position.
• Netikslūs rodmenys: 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.
• Nėra tęstinumo pyptelėjimo: Check if the circuit is truly continuous. Ensure test leads are making good contact.
• Ekrane rodoma „OL“ (perkrova): Išmatuota vertė viršija pasirinktą diapazoną. Perjunkite į aukštesnį diapazoną.

Jei atlikus šiuos veiksmus problemos išlieka, susisiekite su klientų aptarnavimo tarnyba.

11. Specifikacijos

12. Garantija

The Extech 382252 Earth Ground Resistance Tester Kit typically comes with a 1 metų ribota garantija 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. Parama

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 websvetainėje arba dokumentuose, pridėtuose prie jūsų produkto.