CEM DT-6650 Multifunction Installation Tester

Multifunction Installation Tester with a 3.5″ TFT colour LCD display, provides Insulation Resistance, Earth Resistance, Loop Impedance, Voltage, RCD, PFG and PSC testing.



The CEM DT-6650 Multifunction Installation Tester comes with a 3.5″ TFT colour LCD display, provides insulation resistance, earth resistance, loop impedance, voltage, RCD, PFG and PSC testing.

It is designed for rugged use with an inbuilt software system and ensures the safety of electrical installations in domestic, commercial and industrial applications. It can ensure that the fixed wiring is safe and correctly installed. It’s fast sampling and dual display, clear symbols and exceptionally wide viewing angle are for easy and safe readings.

The CEM DT-6650 has been designed and built to incorporate all the normal tests associated with multifunction testers, including the very latest advancements in “No Trip Technology” when carrying out Loop Testing on RCD protected circuits, producing fast & accurate results, together with “Auto Testing & Ramp Testing of RCDs”, along with  “Earth Resistance Ground Spike Testing” (optional spike kit).

Additional information







Dust & Water Proof


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Power Source

Battery Operated

Battery Type


Battery Size


No of Batteries



Relative Humidity Range

75% (30°C~ 40°C) Non-condensing, 95% (10°C~ 30°C) Non-condensing

Diode & Continuity

Loop Resistance

L-PE (Hi-Amp): 0 to 999Ω

Loop Resistance Resolution

0.01Ω to 1Ω

Loop Resistance Accuracy


Line Resistance

L- N: 0 to 999Ω, L-PE (No Trip): 0 to 999Ω

Line Resistance Resolution

L-N: 0.01Ω to 1Ω, L-PE (No Trip): 0.01Ω to 1Ω

Line Resistance Accuracy

L-N: ±4%, L-PE (No Trip): ±5%

Voltage Range

80V to 500V

Frequency Range

Frequency Resolution


Frequency Accuracy


Voltage Resolution


Voltage Accuracy


Earth Resistance Range

0Ω to 2000Ω




  • 3.5″ TFT Full Colour LCD Display (320×240 pixels)
  • Help Screen, detailing Coloured Wiring Diagrams & Connections
  • Internal Data Record Files held on removable SD Card
  • Date & Time recording of all Test Results
  • Future-proof – Downloadable System Upgrades
  • Alpha-numerical keypad for keying all aspects of Data including: Client, Site & Circuit Details
  • Bluetooth Compatible
  • IP65
  • TV output ( PAL or NTSC ) for Client Presentation Plus Many More Features
  • Fast & Accurate
  • Non-Trip Loop Test
  • Full Colour Help Screen, detailing wiring diagrams and connections
  • Internal Data Record Files, held on removable SD Card
  • Pass / Fail indication for RCD Tests
  • Internal Memory
  • Safe Earth Volt touch pad detects raised earth
  • Remote switch probe for ease of use
  • Easy, Reliable & Accurate Compensations of Test Leads & Mains Lead
  • Electronic Lockout to prevent incorrect connections
  • Intelligent Help
  • Fast High Current Loop Test
  • Continuity Test
  • Rechargeable Batteries & mains Charger
  • Accessories: Rigid Hard Carrying Case with Steel locking clips, Full set of test leads, probes, Crocodile clips, Instruction manual, Software


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