*** Fluke 1664FC demo stock special offer, we’re selling off a limited number of Fluke 1664FC units from our demo stock. These are brand new with only display/demo use so may show some small signs of having been out the box (all leads and accessories are complete). Full manufacturer warranty and CAL cert included*. Save yourself pounds!! ***
Protect appliances, share results wirelessly, perform seven tests with one touch. Latest firmware version with EV RCD test capability (when used in conjunction with an EV charge point adapter - sold separately).
Insulation pretest
Protect the installation. Avoid costly mistakes.
The Fluke 1664 FC Installation Tester is the only Installation with "Insulation PreTest," which warns you about potentially serious and costly mistakes. If the tester detects that an appliance is connected to the system under test, it will stop the insulation test and provide a visual warning. This helps eliminate accidental damage to peripheral equipment and keeps your customers happy.
Fluke Connect and FlukeCloud™ Storage
Share from anywhere.
Stay on the same page even when you and your team are in different places. Fluke Connect allows your 1664 FC Installation Tester to send test results to your smartphone so you can connect and collaborate with others. It's the fastest way to let your team see what you see, helping you get approvals without leaving the field.
Retrieve stored results from anywhere
FlukeCloud™ storage allows you to retrieve stored results whether you are in the office or in the field to make decisions in real time. Plus you can import the data into Fluke DMS to process and generate certificates. Plus you get world-class data protection. Safe. Secure. Fast. More accurate. All from the power of Fluke Connect.
Auto Test reduces test time up to 40%
Auto Test does all required installation tests in one sequence, ensuring compliance with local installation regulations. It reduces the number of manual connections, decreases the possibility of making errors and reduces test time up to 40% from previous Fluke models.
Test current 1 mA @ 50 kΩ, 1 mA @ 100 kΩ, 1 mA @ 250 kΩ, 1 mA @ 500 kΩ, 1 mA @ 1 MΩ
Loop and line impedance (ZI)
Range 10 Ω / 0.001 Ω / High current mΩ mode
Resolution 0.01 Ω / 0.1 Ω / 1 Ω
Prospective earth fault current, PSC test
Range 1000 A / 10 kA (50 kA)
Resolution 1 A / 0.1 kA
Computation Prospective earth fault current (PEFC) or Prospective short circuit current (PSC) determined by dividing measured mains voltage by measured loop (L-PE) resistance or line (L-N) resistance, respectively.
RCD testing, RCD types tested
RCD Type AC¹, G²,S³
Model 1664 A, AC, B5, S
Tripping speed test (ΔT)
Current settings¹ 10-30-100-300-500-1000 mA – VAR, 10-30-100 mA
Multiplier x ½, x 1, x 5
Measurement range RCD Type G: 310 ms, 50 ms; RCD Type S: 510 ms, 160 ms
RCD/FI-Tripping Current Measurement/Ramp Test (IΔN)
Current range 30% to 110% of RCD rated current¹
Step size 10% of IΔN²
Dwell time Type G 300 ms/step
Type S 500 ms/step
Measurement accuracy ±5%
Specified trip current ranges (EN 61008-1) 50% to 100% for Type AC, 35% to 140% for Type A (>10 mA), 35% to 200% for Type A (≤10 mA), 50% to 200% for Type B, ²5% for Type B
Earth Resistance Test (RE)
Range 200 Ω / 2000 Ω
Resolution 0.1 Ω / 1Ω
Frequency 128 Hz
Output Voltage 25 V
Phase Sequence Indication
Icon Phase Sequence indicator.
General Specifications
Size (L x W x H) 10 x 25 x 12.5 cm
Weight (incl. batteries) 1.3 Kg
Battery size, quantity Type AA, 6 ea.
Sealing IP-40
Safety Complies with EN61010-1 Ed 2.0 (2001-02), UL61010, ANSI/ISA –s82.02.01 2000 and CAN/CSA c22.2 No. 1010 2nd edition
Overvoltage CAT III / 500V; CAT IV 300V
Performance EN61557-1 to EN61557-7 Second Edition and EN61557-10 Second Edition
Why choose Instrotech for your electrical test equipment?
With over 40 years’ experience supporting UK electricians, technicians and engineers, Instrotech is your trusted partner for quality tools and expert service. When you purchase from us, you benefit from:
Free UK shipping on all orders
Access to our knowledgeable technical support team
Available calibration services to maintain safety compliance
A 90-day money-back guarantee for complete peace of mind
We’re committed to helping you work safely and efficiently with industry-leading products and ongoing support.
