Extech EX820A 1000A True RMS AC Clamp Mjerač s IR termometrom

1. Uvod

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.

Sigurnosne informacije: 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 Metar višeview

2. Značajke proizvoda

• Pravo RMS mjerenje: Pruža točna očitanja za nesinusoidne valne oblike.
• 1000A AC Current Measurement: High current capacity for demanding applications.
• Built-in IR Thermometer: Non-contact temperature measurement with laser pointer for identifying hot spots.
• LoZ (Low Impedance) Mode: Prevents false readings caused by ghost voltages.
• Niskopropusni filtar (LPF): Ensures accurate measurements in electrically noisy environments.
• Mjerenje udarne struje: 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.
• Otvaranje čeljusti: 43 mm (1.7 inches) for large conductors.
• Funkcije multimetra: Uključuje AC/DC Voltage, Resistance, Capacitance, Frequency, Diode, and Continuity.

Figure 2: Display with LoZ and LPF Indicators

3. Postavljanje

3.1 Raspakiranje i pregled

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 Ugradnja baterije

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

1. Provjerite je li mjerač ISKLJUČEN.
2. Pronađite poklopac odjeljka za baterije na stražnjoj strani mjerača.
3. Pomoću odvijača odvrnite vijak koji pričvršćuje poklopac baterije.
4. Remove the cover and insert the 9V battery, observing correct polarity.
5. Vratite poklopac baterije i zategnite vijak.

3.3 Spajanje mjernih kabela

Za svtage, resistance, capacitance, frequency, diode, and continuity measurements, connect the supplied test leads:

• Insert the red test lead into the VΩHz+ input jack.
• Umetnite crni ispitni kabel u COM ulaznu utičnicu.

Slika 3: Uključene komponente

4. Upute za rad

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, otpor/kontinuitet).

4.1 Mjerenje izmjenične struje (Clamp)

1. Set the rotary switch to the 'A~' position.
2. Otvorite clamp jaws by pressing the jaw release trigger.
3. Zatvorite jedan vodič s clamp čeljusti. Provjerite jesu li čeljusti potpuno zatvorene.
4. Očitajte vrijednost izmjenične struje na zaslonu.

Figure 4: Measuring AC Current with the Clamp

4.2 Mjerenje AC/DC Voltage

1. Spojite mjerne kabele kako je opisano u odjeljku 3.3.
2. Postavite rotacijski prekidač u položaj 'V'.
3. Press the 'MODE' button to select AC (V~) or DC (V–) voltage.
4. Apply the test probes to the circuit points where voltage treba mjeriti.
5. Pročitajte svtage vrijednost na zaslonu.

Figure 5: Measuring Voltage with Test Leads

4.3 Using the Infrared Thermometer

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 u krugovima gdje je volumen ghosttages are suspected, select the LoZ mode to provide a low impedance path that dissipates these stray voltages.

1. Set the rotary switch to the 'V LoZ' position.
2. Spojite ispitne vodove na krug.
3. Pročitajte svtage. This reading will be more accurate in the presence of ghost voltages.

4.5 niskopropusni filtar (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 mjerenje.

4.6 Mjerenje udarne struje

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. Primijenite clamp to the motor's power lead and start the motor. The meter will display the peak inrush current.

5. Održavanje

5.1 Čišćenje

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 Zamjena baterije

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 Skladištenje

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. Rješavanje problema

• Mjerač se ne uključuje: Provjerite ugradnju baterije i osigurajte da je baterija dovoljno napunjena. Zamijenite je ako je potrebno.
• Nema očitanja ili se prikazuje 'OL' (preopterećenje): 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 čeljusti.
• Netočna očitanja: Provjerite voltage. 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. Specifikacije

8. Jamstvo i podrška

8.1 Informacije o jamstvu

The Extech EX820A Clamp Mjerač dolazi s Jamstvo 2 godine od datuma kupnje. Ovo jamstvo pokriva nedostatke u materijalu i izradi pri normalnoj uporabi. Ne pokriva štetu nastalu zbog nepravilne upotrebe, neovlaštene modifikacije, nezgode ili nemara. Molimo sačuvajte dokaz o kupnji za potrebe jamstvenog zahtjeva.

8.2 Tehnička podrška

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 webmjesto.