Flir Extech EX520 User's Guide

Flir Extech EX520 Multimeter manual cover

Pages 15

Year 2013

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Flir Extech EX520 Multimeter Specification

The Flir Extech EX520 Multimeter is a robust, high-performance device designed for rigorous electrical and electronic testing. Engineered to meet the needs of professionals, this multimeter is equipped with a 6,000-count display, offering precise readings for a variety of measurements including voltage, current, resistance, capacitance, frequency, and temperature. Its capability to measure both AC and DC voltage up to 1000V and current up to 20A makes it suitable for a wide range of applications.

The EX520 is built to endure harsh working conditions with its double-molded, waterproof, and dustproof IP67-rated casing, ensuring durability and reliability in challenging environments. Its ergonomic design features a large, easy-to-read backlit LCD display, enhancing visibility in low-light conditions. The multimeter also includes a built-in non-contact voltage detector, which adds an extra layer of safety by allowing users to identify live wires without direct contact.

Safety is further emphasized with its CAT IV 600V/CAT III 1000V safety rating, making it suitable for industrial and commercial use. The device is equipped with a data hold function to freeze readings on the display, and a relative mode to zero out the reading for relative measurements. Additionally, the EX520 offers a peak hold feature to capture transients, and an auto-ranging function to simplify operation.

The multimeter is powered by a 9V battery, ensuring long-lasting performance, and includes an auto power-off function to conserve battery life. Accessories such as test leads, a protective holster, a tilt stand, and a carrying case are included, providing convenience and enhanced functionality for fieldwork. Overall, the Flir Extech EX520 Multimeter stands out for its accuracy, rugged design, and comprehensive feature set, making it an essential tool for electrical professionals.

Flir Extech EX520 Multimeter F.A.Q.

How do I change the battery on the Flir Extech EX520 multimeter?

To change the battery, turn off the multimeter and disconnect any test leads. Remove the back cover by unscrewing the screws holding it in place. Replace the old battery with a new 9V battery, and reassemble the multimeter.

What should I do if the multimeter display is not turning on?

First, check if the battery is properly installed and has enough charge. If the battery is fine, inspect the battery contacts and terminals for corrosion or damage. Also, verify that the backlight button is not inadvertently turned off.

How can I test a diode using the Flir Extech EX520?

Set the multimeter to the diode test mode. Place the red probe on the anode and the black probe on the cathode of the diode. A forward-biased diode will show a voltage drop, typically between 0.6 to 0.7 volts for silicon diodes. Reverse the probes to check for reverse bias; the display should show 'OL' indicating high resistance.

What is the procedure to measure AC voltage with the EX520?

Turn the dial to the AC voltage (V~) setting. Insert the black test lead into the COM terminal and the red test lead into the VΩ terminal. Connect the probes across the AC source to measure the voltage. Ensure proper safety precautions are taken when measuring high voltages.

How can I ensure accurate resistance measurements?

Ensure the multimeter is calibrated and the battery is fully charged. Use the correct range setting for the expected resistance. For accurate readings, make sure the circuit is de-energized and isolated from any power source. Clean the test leads and contacts to reduce measurement errors.

Why is the multimeter giving inconsistent readings?

Inconsistent readings can result from a weak battery, poor connections, or a faulty component in the circuit. Ensure that the multimeter's test leads are in good condition and that the probes are making solid contact with the measurement points. If the issue persists, perform a reset or calibration of the device.

How do I measure current using the EX520 multimeter?

To measure current, switch the dial to the appropriate current (A) range. Connect the red test lead to the A or mA terminal, depending on the current range. Break the circuit and connect the multimeter in series with the load. Ensure the circuit is de-energized before connecting the multimeter.

What should I do if the multimeter's fuse blows?

Turn off the multimeter and disconnect all test leads. Open the back cover and locate the fuse compartment. Replace the blown fuse with one of the same rating. Always use fuses recommended by the manufacturer to prevent damage to the multimeter.

Can the EX520 measure frequency, and if so, how?

Yes, the EX520 can measure frequency. Set the dial to the Hz setting. Connect the test leads to the circuit where frequency measurement is desired. The frequency will be displayed on the multimeter screen. Ensure that the input signal is within the multimeter's frequency measurement range.

How do I perform a continuity test with the EX520?

Set the multimeter to the continuity test mode, usually indicated by a sound wave or diode symbol. Connect the test leads across the component or circuit. A continuous tone indicates a closed circuit, while no sound indicates an open circuit.