Fluke 1663 Multifunction Testers

  • Fluke 1663 Multifunction Tester | Fluke
  • Fluke 1663 Multifunction Tester | Fluke

Key features

  • Full featured tester for installation professionals
  • Tests to all local regulations and provides test results for complete documentation
  • Tests continuity at L-N, N-PE inputs
  • Tests smooth dc sensitive RCDs (Type B)
  • Tests earth resistance, voltage, and frequency
  • Offers multiple test voltages: 50 V, 100 V, 250 V, 500 V, 1000 V
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Product overview

Fluke 1663 Multifunction Installation Tester is the ideal choice for hard working professionals

The 1663 installation tester delivers the full-featured functionality and advanced measurement capabilities that professional installers need. It is compact and lightweight (less than 1.3 kg) and comes with a padded carrying and waist strap for convenient handling. Operation is intuitive and easily mastered by all levels of workers so you can put it to work immediately for quick and efficient testing to all local regulations. Additional helpful features like On/Off switchable auto-start for RCD and loop test, and self-test save time and give you more confidence in your results.

Other useful capabilities:

  • Checks wiring polarity to detect broken N wires
  • Measures insulation resistance and loop and line resistance
  • Includes Z-max memory for loop tests to support easy evaluation of the highest loop test value
  • Provides unique zero adapter for fast, reliable and accurate test lead and mains cord compensation
  • Measures motor windings with continuity test
  • Calculates prospective earth fault current (PEFC/IK) and prospective short-circuit current (PSC/IK)
  • Measures RCD switching time and tripping level (ramp test)
  • Measures trip time and current for RCD type A & AC in one test
  • Measures RCD variable current
  • Provides automatic RCD test sequence
  • Includes a phase sequence indicator
  • Safety rated CAT III 500V, CAT IV 300V
  • Comes with hard carrying case, padded carrying and waist strap, and remote control probe and lead


Fluke 1663 Multifunction Installation Tester
Buy it
  • 6x AA (IEC LR6) cell batteries
  • C1600 hard carrying case
  • Zero adapter
  • Heavy duty mains cord
  • STD standard test lead set
  • Padded carrying and waist strap
  • Quick reference guide
  • TP165X remote control probe and lead
  • User's manual on CD-ROM


AC voltage measurement
Range500 V
Resolution0.1 V
Accuracy 45 Hz – 66 Hz0.8% + 3
Input impedance360 kΩ
Overload protection660 V rms
Continuity testing (RLO)
Range (autoranging)20 Ω / 200 Ω / 2000 Ω
Resolution0.01 Ω / 0.1 Ω / 1 Ω
Open Circuit Voltage>4 V
Insulation resistance measurement (RISO)
Test voltages50-100-250-500-1000 V
Accuracy of tTest voltage (at rated test current)+10%, -0%
Test voltage50 V
100 V
250 V
500 V
1000 V
Insulation resistance range20 MΩ /50 MΩ
20 MΩ / 100 MΩ
20 MΩ / 200 MΩ
20 MΩ / 200 MΩ / 500 MΩ
20 MΩ / 200 MΩ / 1000 MΩ
Resolution0.01 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 current1 mA @ 50 kΩ
1 mA @ 100 kΩ
1 mA @ 250 kΩ
1 mA @ 500 kΩ
1 mA @ 1 MΩ
Loop and line impedance (ZI)
Range10 Ω / 0.001 Ω / High current mΩ mode
Resolution0.01 Ω / 0.1 Ω / 1 Ω
Prospective earth fault current, PSC test
Range1000 A / 10 kA (50 kA)
Resolution1 A / 0.1 kA
ComputationProspective 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
Model 1663A4, AC¹, G²,S³
Notes¹Responds to AC
²General, no delay
³Time delay
4Responds to pulsed signal
5Responds to smooth DC signal
Tripping speed test (ΔT)
Current settings¹10-30-100-300-500-1000 mA – VAR
10-30-100 mA
Multiplierx ½, x 1
x 5
Measurement rangeRCD Type G310 ms
50 ms
RCD Type S510 ms
160 ms
Notes¹1000 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 range30% to 110% of RCD rated current¹
Step size10% of IΔN²
Dwell timeType G300 ms/step
Type S500 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
Notes¹30% 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)
Range200 Ω / 2000 Ω
Resolution0.1 Ω / 1Ω
Frequency128 Hz
Output Voltage25 V
Phase Sequence Indication
Iconicon phase sequence indicator  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, quantityType AA, 6 ea.
SafetyComplies with EN61010-1 Ed 2.0 (2001-02), UL61010, ANSI/ISA –s82.02.01 2000 and CAN/CSA c22.2 No. 1010 2nd edition
OvervoltageCAT III / 500V; CAT IV 300V
PerformanceEN61557-1 to EN61557-7 Second Edition and EN61557-10 Second Edition