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FCC3450 3000 A flexible clamp meter

You may have a weak or dead battery. Simply turn off the clamp meter and remove the battery cover to replace the batteries on the unit.

The meter displays the battery capacity when powering up. If the display is dim or 0 % is shown on the display when powering on, please replace the batteries.

The FCC3450 is not suitable for phase to earth voltage measurements on protected circuits with RCD/RCBO and GFCI devices fitted, due to the auto- select feature. 

When measuring current, move a single cable in the centre of the flexible clamp jaw to make it less prone to error. If measuring voltage or resistance with the test leads, check they are connected properly to the clamp. Inspect the test leads for damage.

Check the clamp lock – turn the knob to unlock the clamp; turn the opposite way to lock. Ensure the locking ribs are aligned with the cutout when connecting the clamp back into the lock to avoid it getting jammed.

Be sure not to measure any current beyond the rated current and make sure the wire is locked into the clamp (ensure you do not get too close to the coil during measurement).

When you use a clamp meter, ensure only one phase conductor at a time is clamped. When current flows to a conductor, it produces a magnetic field around the conductor. The more current, the stronger the magnetic field. The magnetic field induces a voltage into the clamp portion of the meter. Clamping around two or more conductors will cause the magnetic fields to cancel each other and the resultant reading, if not "zero", will be completely erroneous. 

Make sure you have the latest version of the app installed as the app need to sometime be updated to keep up with the device’s latest updates. See “How do I download the mobile app?” in the FAQ section to check you are using the latest version.  

Then, make sure Bluetooth is turned on in your mobile device settings. Verify that the Bluetooth icon is shown as ‘on’ in the top left corner of the display.

When turned on, the FCC34500 defaults to Auto Power Off (APO), this will turn the device off after 20 mins to save battery., To disable this, see “How to turn off the APO?” in this troubleshooting section.

To disable Auto Power Off, push and hold the Bluetooth button when turning the FCC3450 on. When "OFF” appears on the LCD, release both buttons. The APO symbol on the display should not be visible.

Turn the locking connector anti-clockwise to unlock the flexible coil. The locking connector stays attached to the body of the FCC3450 and only the coil that is in the middle is removed. Check the markings on the locking connector to ensure turning the correct way to lock and unlock the coil from the body of the FCC3450.

If the coil is in the unlocked position and doesn’t come out, it may need a wiggle to release the anti-rotation grooves to remove it.

If the measured signal exceeds the rated range of the FCC3450, “OL” or “–OL” will display on the screen due to an overload condition being detected. See the user guide for the max input range for the given function you are trying to use and ensure it is within the limits of the FCC3450

This means that the FCC3450 has not detected any input on the leads, or the clamp if is not detecting any current. If using the lead and probes, ensure they are correctly connected, not damaged, and making good contact with what you are trying to measure.

If you are trying to measure current with the clamp, make sure you are only connected around one of the phases and the minimum current on the from the unit under test meets the lower limit of the FCC3450 specification. Also refer to the user guide for positioning of the clamp head on the conductor to ensure reliable reading.

The FCC3450 is not suitable for measuring phase-to-earth voltage on RCD/RCBO or GFCI’s protected circuits due to the device defaulting to the “LoZ” mode. The FCC3450 defaults to 4 kΩ for input impedance until it detects a voltage >30 V at which point the impedance increases to >375 kΩ with an input voltage up to 1000 V. The switch over time from the device may be slow enough to trip the RCD/RCBO or GFCI’s device.

Note: Do not use the FCC3450 to measure voltages in circuits that could be damaged by the meters “LoZ” mode low impedance (approx. 4 kΩ).