1
Introduction
The 279 FC True-rms Thermal Multimeter (the Multimeter or 
Product) is a digital multimeter with an integrated thermal 
imaging camera. 
The Multimeter measures or tests:
•
AC voltage
•
AC current with the iFlex
•
DC voltage
•
Volts/Hertz ratio
•
Resistance
•
Capacitance
•
Continuity
•
Diodes
•
Frequency
Use the IR camera for:
•
Temperature measurements
•
Thermal images
Use the detachable iFlex (Flexible Current Probe) accessory 
for:
•
AC current measurement
•
Improved access to awkward-sized conductors and wires
The Multimeter supports the Fluke Connect™ Wireless 
System (may not be available in all regions). Fluke Connect™ 
is a system that wirelessly connects your Multimeter with an 
app on your smartphone or tablet. The app shows the 
Multimeter measurement or thermal image on your 
smartphone or tablet display. You can save these 
measurements and images to Fluke Cloud™ storage and 
share with your team.
See Fluke Connect™ Wireless System on page 5 for more 
information.