Extech 382252 Earth Ground Resistance Tester Kit User Manual

1. Rhagymadrodd

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. Gwybodaeth Diogelwch

Rhybudd: 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.

• Peidiwch â mynd y tu hwnt i'r terfynau mewnbwn uchaf ar gyfer unrhyw swyddogaeth.
• Exercise extreme caution when working with live electrical circuits.
• Ensure the meter is in good working condition and free from damage before use.
• Always use the correct function and range for measurements.
• Amnewidiwch y batris pan fydd y dangosydd batri isel yn ymddangos i sicrhau darlleniadau cywir.
• 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. Cynnwys Pecyn

Gwiriwch fod yr holl eitemau yn bresennol ac yn ddi-fwlch wrth ddadbacio:

• Extech 382252 Earth Ground Resistance Tester
• Test Leads (set)
• Auxiliary Earth Bars (2 pieces)
• Achos Cario
• 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. Nodweddion Cynnyrch

The Extech 382252 offers the following key features:

• Earth Ground Resistance measurement in three ranges: 20Ω, 200Ω, and 2000Ω.
• AC / DC Voltaggalluoedd mesur e.
• Resistance and Continuity testing functions.
• Automatic zero adjustment for accurate readings.
• Arddangosfa LCD fawr, hawdd ei darllen.
• Data Hold function to freeze displayed readings.
• Goleuadau cefn ar gyfer gwelededd mewn amodau golau isel.
• Durable protective rubber holster.

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

5. Gosod

5.1 Gosod Batri

1. Ensure the meter is powered off.
2. Lleolwch glawr adran y batri ar gefn y mesurydd.
3. Defnyddiwch sgriwdreifer i dynnu'r sgriw(iau) sy'n sicrhau'r clawr.
4. Insert six (6) 1.5V AA batteries, observing correct polarity (+/-).
5. Rhowch glawr adran y batri yn ôl a'i sicrhau gyda'r sgriw(iau).

5.2 Cysylltu Gwifrau Prawf

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. Cyfarwyddiadau Gweithredu

6.1 Pŵer Ymlaen/Diffodd

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 Swyddogaeth Dal 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 Swyddogaeth Goleuo Cefn

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. Paratoi: 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. Cysylltu Gwifrau Prawf:
   • 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. Dewis Ystod: 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. Darllenwch y Mesuriad: The resistance value will be displayed on the LCD.
7. Gwirio Cywirdeb: 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 Cyftage Mesur

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. Cysylltwch y stilwyr prawf ar draws y gylched neu'r gydran i'w mesur.
4. Darllenwch y cyftage gwerth ar yr arddangosfa.

8.2 Mesur Gwrthiant

1. Ensure the circuit or component is de-energized.
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. Cysylltwch y stilwyr prawf ar draws y gydran.
5. Darllenwch y gwerth gwrthiant ar yr arddangosfa.

8.3 Prawf Parhad

1. Ensure the circuit or component is de-energized.
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. Cysylltwch y stilwyr prawf ar draws y gydran neu'r wifren.
5. An audible beep indicates continuity (low resistance). The display will show the resistance value.

9. cynnal

9.1 Glanhau

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 Batri Newydd

When the low battery indicator appears on the display, replace the batteries promptly to maintain measurement accuracy. Refer to Section 5.1 for battery installation instructions.

9.3 Storio

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. Datrys Problemau

• No Display/Meter Not Powering On: Check battery installation and ensure batteries are fresh. Verify the function dial is not in the 'OFF' position.
• Darlleniadau Anghywir: 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.
• Dim Bîp Parhad: Check if the circuit is truly continuous. Ensure test leads are making good contact.
• Display Shows 'OL' (Overload): Mae'r gwerth mesuredig yn fwy na'r ystod a ddewiswyd. Newidiwch i ystod uwch.

If issues persist after following these steps, contact customer support.

11. manylebau

12. Gwarant

The Extech 382252 Earth Ground Resistance Tester Kit typically comes with a Gwarant cyfyngedig 1 mlynedd 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. Cefnogaeth

For technical assistance, calibration services, or further information regarding your Extech 382252, please refer to the official Extech websafle neu cysylltwch â'u hadran cymorth cwsmeriaid. Fel arfer gellir dod o hyd i fanylion cyswllt ar wefan y gwneuthurwr websafle neu yn y ddogfennaeth sydd wedi'i chynnwys gyda'ch cynnyrch.