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393/393 FC
Users Manual
16
Inrush Current/Peak Current
Inrush Current is surge current that occurs when an electrical device is first powered on. The
Clamp can capture this surge current reading. Current spikes from motor drives are one example
of such an event. The Inrush function takes samples over a 100 ms period and calculates the
starting current envelope.
To measure inrush current:
1. Select the measurement function (ac current, dc current, or iFlex ac current).
2. Center the Jaw or iFlex Probe around the live wire on the device.
3. Push I.
Dashes show on the display until the Clamp detects the inrush current. When the inrush
current is detected, the measurement and the peak value show simultaneously on the
display.
Data Logging (393 FC)
The Fluke Connect™ app enables you to log the data measurements. This app shows
measurements from the connected Clamp on your smartphone or tablet display. The app also
saves the measurements in the Product internal memory and to the Fluke Connect Cloud™
storage. With Fluke Connect Cloud storage you can easily share the information with your team.
Note
The logging interval is set in the Fluke Connect app. Logging is not available for the
inrush mode.
To log measurements:
1. On the Clamp, push I for >2 s.
The memory icon indicates how much memory is available.
2. On the Clamp, push I for >2 s to stop logging.
Clear Memory (393 FC)
See Power-On Options.
Firmware Update (393 FC)
Firmware updates are available for Clamps that have the Fluke Connect™ feature. The Fluke
Connect mobile app shows a notification if a firmware update is available when the unit is
connected to the app.
To update:
1. Make sure the Product has at least 50 % battery power available.
2. Make sure you download all the logged data before you update the firmware.
3. In the app, tap Update to start the firmware update to the Product.
1.888.610.7664 sales@GlobalTestSupply.com
Fluke-Direct.com
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