Fluke 1664 UK-DMM Installation Multifunction Tester with Free Fluke 115 Multimeter

The Fluke 1664 UK-DMM is a professional-grade installation multifunction tester designed for electrical contractors and maintenance engineers who need reliable, all-in-one testing for installation verification and compliance. This robust instrument combines loop impedance, insulation resistance, and RCD testing in a single unit, making it essential for ensuring electrical safety standards are met on every job site. With its intuitive interface and clear display, users can quickly diagnose issues and generate accurate test records.

Fluke 1664 UK-DMM Key Features

This Fluke 1664 UK-DMM delivers precise measurements across a wide range of electrical parameters, from AC voltage and continuity to complex insulation resistance and RCD functionality. The device features autoranging capability for resistance measurements and provides accurate loop and line impedance data necessary for prospective fault current calculations. Its insulation resistance function supports test voltages of 50V, 100V, 250V, 500V, and 1000V, catering to diverse testing requirements.

• AC voltage measurement: 500V range, 0.1V resolution, 0.8% + 3 accuracy (45-66 Hz)
• Continuity testing: 20Ω/200Ω/2000Ω ranges with >4V open circuit voltage
• Insulation resistance: 5 test voltages (50-100-250-500-1000V) with varying ranges up to 1000MΩ
• Loop and line impedance: High current mΩ mode for PSC calculations
• RCD testing: AC, G, S, and B types with tripping speed analysis
• Earth resistance: 200Ω/2000Ω ranges with 128Hz frequency output

Who Needs the Fluke 1664 UK-DMM?

Electrical contractors performing new installations will find the Fluke 1664 UK-DMM indispensable for verifying polarity, checking loop impedance, and ensuring proper earth connection before energizing circuits. The comprehensive test capabilities mean fewer site visits and more efficient commissioning processes.

Maintenance engineers responsible for periodic inspection and testing of existing electrical systems will appreciate the instrument’s ability to quickly identify degradation in insulation quality and RCD performance. Regular testing helps prevent unexpected downtime and ensures continued compliance with safety regulations.

Consulting engineers specifying equipment for commercial and industrial projects will rely on the Fluke 1664’s accuracy and extensive feature set to validate design specifications and commissioning requirements. The device provides the data needed for detailed test reports and certification documentation.

Fluke 1664 UK-DMM Applications

During new building commissioning, the Fluke 1664 UK-DMM performs essential installation tests including continuity of protective conductors, insulation resistance verification, and loop impedance checks to confirm the system will operate safely under fault conditions. These initial tests are critical for meeting regulatory requirements and handover documentation.

For routine maintenance schedules, the instrument is ideal for testing the operational status of RCDs and checking insulation resistance of cables and motors to detect moisture ingress or insulation breakdown. Early detection of these issues allows for proactive repairs before they escalate into serious faults.

When troubleshooting persistent electrical problems, the Fluke 1664 UK-DMM’s earth resistance and loop impedance functions help identify grounding faults and high-resistance connections that may cause nuisance tripping or equipment damage. The phase sequence indication feature also aids in three-phase system verification.

Why Buy Fluke 1664 UK-DMM from MME?

MME is your MME for genuine Fluke testing equipment in the UAE, offering the complete range of installation multifunction testers with manufacturer warranty support. When you purchase from mme-ae, you benefit from expert product knowledge and technical assistance to help you select the right tool for your specific application needs. Our commitment to customer service ensures you receive authentic products with full traceability and certification.

Mohammad Mahdi Electronics provides competitive pricing and efficient delivery across the UAE, making it easy to equip your team with professional-grade testing tools. We understand the importance of downtime reduction, which is why we stock popular models like the Fluke 1664 UK-DMM for immediate dispatch. Our after-sales support team is available to assist with any operational questions or calibration requirements.

For your next electrical testing project, choose MME for genuine Fluke products and reliable service you can depend on. Contact our team today to discuss your requirements or place an order for the Fluke 1664 UK-DMM.

Fluke 1664 UK-DMM Specifications

AC voltage measurement
Range	500 V
Resolution	0.1 V
Accuracy 45 Hz – 66 Hz	0.8% + 3
Input impedance	360 kΩ
Overload protection	660 V rms
Continuity testing (RLO)
Range (autoranging)	20 Ω / 200 Ω / 2000 Ω
Resolution	0.01 Ω / 0.1 Ω / 1 Ω
Open Circuit Voltage	>4 V
Insulation resistance measurement (RISO)
Test voltages	50-100-250-500-1000 V
Accuracy of tTest voltage (at rated test current)	+10%, -0%
Test voltage	50 V 100 V 250 V 500 V 1000 V
Insulation resistance range	20 MΩ /50 MΩ 20 MΩ / 100 MΩ 20 MΩ / 200 MΩ 20 MΩ / 200 MΩ / 500 MΩ 20 MΩ / 200 MΩ / 1000 MΩ
Resolution	0.01 MΩ / 0.1 MΩ 0.01 MΩ / 0.1 MΩ 0.01 MΩ / 0.1 MΩ 0.01 MΩ / 0.1 MΩ / 1 MΩ 0.01 MΩ / 0.1 MΩ / 1 MΩ
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
Notes	¹Responds to AC ²General, no delay ³Time delay 4Responds to pulsed signal 5Responds to smooth DC signal
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
Notes	¹1000 mA type AC only 700 mA maximum type A in VAR mode VAR mode not available for type B.
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
Notes	¹30% to 150% for Type A IΔN > 10 mA 30% to 210% for Type A IΔN = 10 mA 20% to 210% 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 is active.
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