Mwongozo wa Mtumiaji wa Kifaa cha Kujaribu Upinzani wa Ardhi ya Dunia cha Extech 382252

1. Utangulizi

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. Taarifa za Usalama

Onyo: 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.

• Usizidi mipaka ya juu zaidi ya ingizo kwa chaguo lolote.
• Exercise extreme caution when working with live electrical circuits.
• Hakikisha mita iko katika hali nzuri ya kufanya kazi na haina uharibifu kabla ya matumizi.
• Daima tumia chaguo sahihi la utendaji na masafa kwa vipimo.
• Badilisha betri wakati kiashiria cha betri ya chini kinaonekana ili kuhakikisha usomaji sahihi.
• Keep hands and fingers away from test probe tips when making measurements.
• Usitumie mita katika angahewa zenye milipuko au mbele ya gesi au vumbi linaloweza kuwaka.

3. Yaliyomo kwenye Kifurushi

Thibitisha kwamba vitu vyote vipo na havijaharibika wakati wa kufungua:

• Extech 382252 Earth Ground Resistance Tester
• Test Leads (set)
• Auxiliary Earth Bars (2 pieces)
• Kesi ya kubeba
• 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. Bidhaa za Bidhaa

The Extech 382252 offers the following key features:

• Earth Ground Resistance measurement in three ranges: 20Ω, 200Ω, and 2000Ω.
• Juzuu ya AC / DCtage measurement capabilities.
• Resistance and Continuity testing functions.
• Automatic zero adjustment for accurate readings.
• Onyesho kubwa la LCD ambalo ni rahisi kusoma.
• Data Hold function to freeze displayed readings.
• Backlight for visibility in low-light conditions.
• Durable protective rubber holster.

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

5. Kuweka

5.1 Ufungaji wa Betri

1. Hakikisha mita imezimwa.
2. Locate the battery compartment cover on the rear of the 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. Badilisha kifuniko cha sehemu ya betri na ukifunge kwa skrubu.

5.2 Kuunganisha Miongozo ya Mtihani

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. Maagizo ya Uendeshaji

6.1 Washa/Zima

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 Kazi ya Kushikilia Data

Bonyeza kitufe cha 'SHIKILIA' ili kugandisha usomaji wa sasa kwenye onyesho. Kibonyeze tena ili kuachilia usomaji wa moja kwa moja na kuendelea na usomaji wa moja kwa moja.

6.4 Kazi ya Mwangaza nyuma

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. Maandalizi: 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. Kuunganisha Miongozo ya Mtihani:
   • 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. Chagua Masafa: 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. Perform Test: Press the 'TEST' button. The meter will inject a current and measure the voltage drop to calculate the earth ground resistance.
6. Kipimo cha kusoma: The resistance value will be displayed on the LCD.
7. Thibitisha Usahihi: 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 Voltage Kipimo

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. Unganisha probe za majaribio kwenye saketi au sehemu itakayopimwa.
4. Soma juzuu yatage thamani kwenye onyesho.

8.2 Kipimo cha Upinzani

1. Hakikisha mzunguko au kijenzi kimeondolewa nishati.
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. Unganisha probe za majaribio kwenye sehemu nzima.
5. Soma thamani ya kupinga kwenye maonyesho.

8.3 Mtihani wa Kuendelea

1. Hakikisha mzunguko au kijenzi kimeondolewa nishati.
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. Unganisha probe za majaribio kwenye sehemu au waya.
5. Mlio unaosikika unaonyesha mwendelezo (upinzani mdogo). Onyesho litaonyesha thamani ya upinzani.

9. Matengenezo

9.1 Kusafisha

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 Ubadilishaji wa Betri

Wakati kiashiria cha betri ya chini kinapoonekana kwenye onyesho, badilisha betri mara moja ili kudumisha usahihi wa kipimo. Rejelea Sehemu ya 5.1 kwa maagizo ya usakinishaji wa betri.

9.3 Hifadhi

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. Utatuzi wa shida

• No Display/Meter Not Powering On: Check battery installation and ensure batteries are fresh. Verify the function dial is not in the 'OFF' position.
• Usomaji usio sahihi: 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.
• Hakuna Mlio wa Mwendelezo: Check if the circuit is truly continuous. Ensure test leads are making good contact.
• Display Shows 'OL' (Overload): The measured value exceeds the selected range. Switch to a higher range.

Ikiwa matatizo yataendelea baada ya kufuata hatua hizi, wasiliana na huduma kwa wateja.

11. Vipimo

12. Udhamini

The Extech 382252 Earth Ground Resistance Tester Kit typically comes with a Udhamini mdogo wa mwaka 1 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. Msaada

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 webtovuti au katika hati iliyojumuishwa na bidhaa yako.