Fluke 1664FC Multifunction Installation Tester with Fluke Connect



  • Fluke’s flagship multifunction tester with Fluke Connect
  • Automatically carries out 5 required installation tests in one sequence
  • Insulation PreTest prevents potentially serious and costly mistakes
  • FlukeCloud allows you to share your results
  • Test smooth DC sensitive RCDs (Type B/B+)
More Information
Warranty 1 year
Price Match Yes
FREE Fluke T6-1000

Fluke 1664FC 18th Edition Multifunction Installation Tester with Fluke Connect

The Fluke 1664 is the top of the range multifunction tester from Fluke. Packed full of new features to help make testing safe, faster and much more convenient.

What’s NEW on the Fluke 1664.

Auto test sequence

Completes 5 required installation test in one sequence with a single touch of the test button, ensuring compliance with local installation regulations. Auto Test reduces the number of manual connections, decreases the chance of making errors and reduces test time by 40% when compared to previous Fluke models.

Insulation Pre test

The Fluke 1664 prevents the user from making potentially serious and costly mistakes when carrying out an insulation test. If the tester detects that an appliance is connected to the system under test, then the insulation test will not be stopped before damage is caused. A visual warning is also displayed. This is a unique feature of the Fluke 1664 which is not found on any other MFT.

Fluke Connect

Fluke Connect available free to download on iOS and Android, allows you to easily store measurement results on the app. You can also easily email your recorded measurements to colleagues for them to view even when they are not on site (Wi-Fi or mobile signal required).


All your data and test results stored via FlukeCloud are ready for easy access using your smart phone or tablet, anytime anywhere. You can also import the data into Fluke DMS to process and generate certificates.

NEW insulation test at L-N, L-PE and N-PE inputs

NEW continuity tests at L-N, L-PE and N-PE inputs

Other Features

  • The 1664’s large, backlit, dual display allows PEFC/ PSC and loop impedance measurements to be displayed simultaneously.
  • The 1664 also has a time-saving auto-null feature that, by simply touching the test leads together and pressing the zero button, measures and stores the test lead resistance, even after the instrument has been switched off. A zero adaptor is also included.
  • Testing particularly sensitive equipment such as telecommunications installations, fire alarm systems, emergency lighting, intruder alarms, sound systems or conductivity of floors can be carried out using the 1664 as it has the required 50V and 100V insulation test ranges.
  • To simplify RCD testing, the 1660 Series models have an auto mode for measuring RCD tripping time in which six tests are automatically carried out in sequence, removing the requirement for the user to keep returning to the installation tester after resetting a tripped RCD. The instrument senses when the RCD has been reset and initiates the next test in the sequence automatically. The 1663 and 1664 also have internal memory for storing results for later recall, as well as a temporary memory that allows you to cycle through results straight after the tests. The 1662, 1663 and 1664 can also measure RCD tripping current (commonly referred to as a ramp test) by gradually increasing an applied current until the RCD trips.
  • Autotest to test line/loop impedance, RCD trip current / trip time, insulation tests with a single connection and button press.
  • Additional high current loop mode. Faster measurements compared to loop tests with non-trip mode for RCDs.
  • Z-max memory for loop tests – easy evaluation of the highest loop test value.
  • Unique zero adapter for fast, always reliable and accurate test lead and mains cord compensation.
  • Fast voltage measurement between L-N, L-PE and N-PE using the mains cord. No need to change measurement connections.
  • Measure RCD trip current & trip time in parallel (RCD type AC and A).
  • Two measurements at once and a dual display. PEFC or PSC and loop impedance are measured and displayed in parallel.
  • Ring testing – select the required input sockets with soft keys – no need to exchange test leads.
  • Automatic test start for Loop & RCD tests – as soon as mains voltage is stable it starts testing.
  • Earth Volt Touchpad detects raised earth voltages >50 V, indicating potential dangerous situations.
  • Supplied with the Fluke SureGrip™ test leads and clips which gives the user a comfortable, reliable grip and consistent results.
  • Rotary dial knob indicates clearly which function is selected, all in one spot with no complex multi-level menus.
  • Large display with backlight, clear symbols and with exceptionally wide viewing angle for easy and safe readings.
  • PASS/FAIL indication for RCD test results.
  • Variable RCD current mode for customized settings.
  • Loop & line resistance with mΩ resolution.
  • Test smooth dc sensitive RCDs (Type B).
  • Extended memory with 3 layers.
  • Use continuity test currents to measure motor windings.
  • Withstands a drop of 1 meter.
  • Compact, lightweight (less than 1.3 kg) and padded neck-strap to free your hands for all day testing.
Compare Fluke 1660 Series 1662 1663 1664 FC
Insulation-PreTest safety function NEW     
Insulation test at L-N, L-PE, N-PE inputs NEW     
Auto Test sequence NEW                       
Performs line/loop impedance, RCD trip current/trip time and insulation tests in one go
Loop and line resistance—resolution     
Continuity test at L-N, L-PE, N-PE inputs NEW   
Continuity test selectable at 250mA/10mA with Auto polarity swap
Test smooth dc sensitive RCDs (Type B/B+)   
Earth resistance   
Voltage measurement TRMS (ac and dc) and frequency 
Wiring polarity checker, detects broken PE and N wires 
Insulation resistance 
Continuity and resistance 
Measure motor windings with continuity test (@ 10 mA) 
Loop and line resistance 
Prospective Earth Fault Current (PEFC/IK) 
Prospective Short-Circuit Current (PSC/IK) 
RCD trip time 
RCD trip current (ramp test) 
Measures trip time (ramp) and current for RCD type A and AC in one test 
RCD variable test current 
Automatic RCD test sequence 
Phase sequence test 
Other Features      
Fluke Connect compatibility NEW     
ShareLive™ calling NEW    
Fluke Cloud™ storage NEW     
On/Off switchable Auto Start for RCD and Looptest NEW 
Illuminated display 
Memory, interface      
Z Max memory (for loop tests- easy evaluation of the highest loop test value)NEW   
Memory 3000 measurements  
IR-USB and BLE interface (use with optional Fluke DMS software)   IR-USB IR-USB/BLE
Included Accessories      
Heavy duty mains cord with single input connector NEW 
Hard case 
Fused test probes
Remote control probe 
Zero adapter 
Safety Overvoltage CAT III 500 V, CAT IV 300 V
3 year warranty
Insulation test voltages : 100V/250V/500V/1000V  
Insulation test voltages : 50V/100V/250V/500V/1000V    

Test4less 'Bolt On Kit's' include a range of useful accessories and offer a guaranteed saving against buying separately. 

 Fluke 1664 Kit Variants
Bolt On Kit 1 Bolt On Kit 2 Bolt On Kit 3
Socket & See FFCB100 UK Easy Fuse Finder    
Socket & See SOK22 Craftsman Socket Tester    
Socket & See iVolt Voltage Detector
Testmate Personal Lockout Tagout Kit 1
Socket & See FFCB200 UK Easy Fuse Finder    
Socket & See DCF200 Dead Circuit Finder  
Socket & See SOK32 Craftsman Socket Tester    
Socket & See FFCB1140 UK Dual Voltage Fuse Finder Kit     ● 
Socket & See SOK34 Easy Socket and Earth Loop Tester     ● 
Socket & See CB400 Non-Trip Professional 17th Edition Calibration Checkbox      ● 


What's Included?

  • Fluke 1664FC Multifunction Installation Tester with Fluke Connect
  • 6x AA (IEC LR6) cell batteries
  • C1600 hard carrying case
  • Zero adapter
  • Heavy duty mains cord
  • STD standard test lead set
  • C1600 hard carrying case
  • Padded carrying and waist strap
  • Quick reference guide
  • TP165X remote control probe and lead
  • User's manual on CD-ROM
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