Extech EX820A 1000A True RMS AC Clamp Compteur avec thermomètre IR

1. Introduction

The Extech EX820A is a professional 1000A True RMS AC Clamp Meter equipped with a built-in non-contact infrared thermometer. This device is designed for accurate electrical measurements and temperature monitoring in various applications, including electrical installations, motors, and other electrical devices. It features a large 6000 count backlit LCD display for clear readings and an ergonomically designed double-molded housing for comfortable, one-handed operation. The 43 mm (1.7 inch) jaw opening accommodates conductors up to 750 MCM or two 500 MCM cables. This meter is rated CAT IV-600 V for enhanced safety.

Consignes de sécurité : Always adhere to local and national safety codes. Use appropriate personal protective equipment. Do not attempt to measure voltages or currents exceeding the meter's specified limits. Ensure the meter is in good working condition before use. Refer to the safety section in the full manual for detailed precautions.

Figure 1: Extech EX820A Clamp Plus de mètreview

2. caractéristiques du produit

• Mesure RMS vraie : Fournit des mesures précises pour les formes d'onde non sinusoïdales.
• Mesure du courant alternatif de 1000 A : High current capacity for demanding applications.
• Built-in IR Thermometer: Non-contact temperature measurement with laser pointer for identifying hot spots.
• Mode LoZ (faible impédance) : Empêche les fausses lectures causées par les volumes fantômestaget.
• Filtre passe-bas (LPF) : Ensures accurate measurements in electrically noisy environments.
• Mesure du courant d'appel : Captures motor start-up current.
• CAT IV-600V Safety Rating: High safety standard for industrial environments.
• 6000 Count Backlit LCD Display: Large, easy-to-read display with illumination for dim lighting conditions.
• Ouverture de la mâchoire : 43 mm (1.7 inches) for large conductors.
• Fonctions du multimètre : Comprend AC/DC Voltage, Resistance, Capacitance, Frequency, Diode, and Continuity.

Figure 2: Display with LoZ and LPF Indicators

3. Installation

3.1 Déballage et inspection

Carefully unpack the meter and its accessories. Verify that all items listed in the 'Included Components' section are present and undamaged. If any item is missing or damaged, contact your supplier immediately.

3.2 Installation de la batterie

The EX820A requires one (1) 9V battery (included). To install or replace the battery:

1. Assurez-vous que le compteur est éteint.
2. Repérez le couvercle du compartiment à piles à l'arrière du compteur.
3. Utilisez un tournevis pour desserrer la vis qui fixe le couvercle de la batterie.
4. Retirez le couvercle et insérez la pile 9V en respectant la polarité.
5. Remettez le couvercle des piles et serrez la vis.

3.3 Connexion des cordons de test

Pour voltage, resistance, capacitance, frequency, diode, and continuity measurements, connect the supplied test leads:

• Insert the red test lead into the VΩHz+ input jack.
• Insérez le fil de test noir dans la prise d'entrée COM.

Figure 3 : Composants inclus

4. Mode d'emploi

The EX820A features a rotary function switch to select the desired measurement mode. Press the 'MODE' button to cycle through functions within a single switch position (e.g., AC/DC voltage, résistance/continuité).

4.1 Mesure du courant alternatif (Clamp)

1. Set the rotary switch to the 'A~' position.
2. Ouvrir le clamp jaws by pressing the jaw release trigger.
3. Entourez un seul conducteur avec le clamp Mâchoires. Assurez-vous que les mâchoires sont complètement fermées.
4. Lisez la valeur du courant alternatif affichée.

Figure 4: Measuring AC Current with the Clamp

4.2 Mesure du vol AC/DCtage

1. Connectez les cordons de test comme décrit dans la section 3.3.
2. Réglez le commutateur rotatif sur la position « V ».
3. Press the 'MODE' button to select AC (V~) or DC (V–) voltage.
4. Appliquez les sondes de test aux points du circuit où voltage doit être mesuré.
5. Lire le voltage valeur sur l'affichage.

Figure 5 : Mesure du volumetage with Test Leads

4.3 Utilisation du thermomètre infrarouge

1. Set the rotary switch to the 'IR TEMP' position.
2. Point the meter's IR sensor (located at the top) towards the target surface. The laser pointer will assist in aiming.
3. Read the surface temperature on the display.

Figure 6: Using the Infrared Thermometer

4.4 LoZ (Low Impedance) Mode

The LoZ function is used to eliminate ghost voltages, which can cause misleading readings. When measuring voltage in circuits where ghost voltages are suspected, select the LoZ mode to provide a low impedance path that dissipates these stray voltaget.

1. Set the rotary switch to the 'V LoZ' position.
2. Connectez les fils de test au circuit.
3. Lire le voltage. This reading will be more accurate in the presence of ghost voltaget.

4.5 Filtre passe-bas (LPF)

The LPF function is designed for accurate measurements on variable frequency drives (VFDs) and other electrically noisy equipment. It filters out high-frequency noise that can distort True RMS readings.

1. Set the rotary switch to the 'A~' or 'V~' position.
2. Press the 'LPF' button to activate the Low Pass Filter. The LPF icon will appear on the display.
3. Proceed with your current or voltage mesure.

4.6 Mesure du courant d'appel

The Inrush function captures the maximum current surge when a motor or other inductive load starts up. This is useful for diagnosing motor starting issues.

1. Set the rotary switch to the 'A~' position.
2. Press the 'INRUSH' button. The meter will be ready to capture the inrush current.
3. Appliquer la clamp to the motor's power lead and start the motor. The meter will display the peak inrush current.

5. Entretien

5.1 Nettoyage

Wipe the meter with a dry, soft cloth. Do not use abrasives or solvents. Periodically clean the input jacks with a cotton swab and alcohol to ensure good contact.

5.2 Remplacement de la batterie

Replace the 9V battery when the low battery indicator appears on the display. Refer to Section 3.2 for battery installation instructions. Always dispose of used batteries responsibly.

5.3 Stockage

When the meter is not in use for an extended period, remove the battery to prevent leakage. Store the meter in a cool, dry place, away from direct sunlight and extreme temperatures.

6. Dépannage

• Le compteur ne s'allume pas : Vérifiez l'installation de la batterie et assurez-vous qu'elle est suffisamment chargée. Remplacez-la si nécessaire.
• Aucune lecture ni « OL » (Surcharge) affichés : Ensure test leads are properly connected and making good contact. Verify the measurement range is appropriate for the input. For current measurements, ensure only a single conductor is within the clamp mâchoires.
• Lectures inexactes : Vérifiez le volume de la batterietage. Ensure the correct function is selected. For voltage/current, consider using LoZ or LPF modes in noisy environments. Ensure proper contact with test points.
• IR Thermometer not working: Ensure the rotary switch is in the 'IR TEMP' position. Check for any obstructions to the IR sensor.

7. Spécifications

8. Garantie et assistance

8.1 Informations sur la garantie

The Extech EX820A Clamp Le compteur est livré avec un Garantie de 2 ans from the date of purchase. This warranty covers defects in materials and workmanship under normal use. It does not cover damage resulting from misuse, unauthorized modification, accident, or neglect. Please retain your proof of purchase for warranty claims.

8.2 Assistance technique

For technical assistance, troubleshooting, or service inquiries, please refer to the official Extech website or contact Extech customer support. Contact information can typically be found in the full printed manual or on the manufacturer's website.