DiLOG DL9118 Multifunction Tester

  • Boasts a wide range of advanced measurement features
  • Results conveyed to the operator via large LCD screen
  • Supplied with neck harness, remote probe and hard carry case
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DiLOG DL9118 Multifunction Installation Tester

The British-made DiLOG DL9118 Multifunction Tester is a 18th edition multifunction tester which performs a whole range of tests including those for insulation resistance, loop impedance, prospective short circuit current, continuity, RCD trip current/times, phase rotation and socket polarity. These functions are supplemented by a range of advanced features that are now widely considered as standard on contemporary MFTs.

Firstly, the unique RCD-LOC XLT non-trip loop test does provides a very accurate test result without the risk of tripping RCDs whilst the instrument’s auto-start function saves time without compromising accuracy. High current loop and line impedance testing adds another option in this important system test. Auto-start is also available for the PSCC test which has a direct readout to quickly determine whether protective devices meet the required standards.

Continuity testing is another string to the DiLOG DL9118’s bow and boasts a null function to negate the effects of lead resistance alongside auto-start. For RCDs, the device can be used to check both trip time and trip current with sophisticated methods such as auto-testing and ramp current for improved speed and accuracy. Insulation resistance measurement is available with test voltages of 250V, 500V and 1000V whilst the voltage and frequency measurement adds more detail to the user’s picture of system performance. Phase rotation indication and socket polarity testing complete a comprehensive list of test functions.

Results are shown to the operator via the DiLOG DL9118’s large LCD screen which offers dynamic, clear presentation of the instrument’s findings. A remote probe is included with the device and operation is made easier by a handy neck harness that allows hands-free use and easy function selection. Furthermore, the device is fully protected against potential damage caused by inadvertent connection cross phases, thereby safeguarding the user’s investment, and a 2-year warranty provides further peace of mind.

This sophisticated, accurate MFT comes in a handy toolbox-style carry case and is supplied with everything needed to carry out tests, such as test leads and crocodile clips, as well as meeting the standards for BS EN61557 and EN61010.

DiLOG part number: DL9118

Key Features

  • No-trip RCD-LOC XLT loop testing
  • High current loop and line testing
  • Prospective short circuit current testing
  • RCD testing for current and speed
  • Phase rotation test
  • Socket polarity test
  • Continuity test with lead resistance compensation
  • Insulation resistance test with test voltages of 250V, 500V and 1000V
  • Voltage and frequency measurement
  • Protected from unintentional cross phase connection
  • Large LCD screen
  • Meets BS EN 61557 and EN61010
  • Neck harness for hands-free use
  • Supplied with remote probe, hard carry case and more
  • 2 year warranty
  DL9110 DL9118
Continuity Test
Insulation Test 250V, 500V 250V, 500V, 1000V
Auto Start Loop & Continuity
RCD Test (AC, A, S-type)
Colour RGB display
Colour change indicates error
Auto RCD Test
RCD Ramp Test
Loop Test (3-wire no-trip)
PFC and PSC Fault Current(L-PE/L-N)
Phase-Phase Line Test (L-L)  
Phase Rotation  
Remote Probe  
Intelligent Full Range Protection
Full calibration certificate

What's In The Box?

  • Dilog DL9118 Multifunction Tester
  • Padded neck strap
  • Professional carry case
  • DI-LOG mains lead
  • 1.2 M black test lead
  • 1.2 M red test lead
  • 1.2 M green test lead
  • Black crocodile clip
  • Red crocodile clip
  • Green crocodile clip
  • Remote probe with test button
  • MN1500 (AA) 1.5v Batteries x 6
  • DL9118 Operating Instruction Manual
  • Calibration certificate


  • Range: 0V to 440V
  • Accuracy: +/- 5% +/- 2digits from 0 to 100Hz
  • Resolution: 1V


  • Range: 0.01Ω to 200Ω
  • Accuracy: +/- 2% +/- 5 digits
  • Resolution 0.01Ω to 1.99Ω; 2.0Ω to 19.9Ω; 20Ω to 200Ω
  • Test Voltage: >4Vdc >25Vdc Open Circuit
  • Test Current: >200mA
  • Compliance: IEC61557-4 and IEC61557-10


  • Range: 0.05MΩ to 200MΩ
  • Accuracy: +/-5% +/-5 digits
  • Resolution: 0.01MΩ to 1.99MΩ; 2.0MΩ to 19.9MΩ; 20MΩ to 200MΩ
  • Test Voltage: 250V/500V/1000V 
  • Test Current: 1mA
  • Compliance: IEC61557-2 and IEC61557-10

No Trip Loop Impedance

  • Range: 0.01Ω to 2000Ω
  • Typical Accuracy: +/-5% +/-12 digits (to 1.99Ω) +/-5 digits (to 2000Ω) 
  • Resolution: 0.01Ω to 1.99Ω; 2.0Ω to 19.9Ω; 20Ω to 2000Ω
  • Test Current: <15mA RMS

High Current Loop Impedance

  • Range: 0.01Ω to 2000Ω
  • Typical Accuracy: +/-5% +/-5 digits 
  • Resolution: 0.01Ω to 1.99Ω; 2.0Ω to 19.9Ω; 20Ω to 2000Ω
  • Test Current: 3.5A Peak

Loop Test PFC Measurement

  • Range: 1A to 26kA
  • Accuracy: +/-5% +/-5 digits
  • Range 1A to 999A; 1kA to 26kA

High Current Line Impedance

  • Range: 0.01Ω to 2000Ω
  • Typical Accuracy: +/-5% +/-5 digits 
  • Resolution: 0.01Ω to 1.99Ω; 2.0Ω to 19.9Ω; 20Ω to 2000Ω
  • Test Voltage: Phase to Neutral 190V to 260V; Phase to Phase 328V to 440V
  • Test Current: 3.5A Peak

Line Test PSC Measurement

  • Range: 1A to 26kA
  • Accuracy: +/-5% +/-5 digits
  • Range: 1A to 999A; 1kA to 26kA

RCD Trip Time Test

  • Range 0ms to 2000ms
  • Accuracy +/-5% +/-2 digits
  • Range: 0 to 2000ms ½ 1x; 0 to 300ms 1x general (500ms selective); 0 to 40ms 5x
  • Test Current: 10mA/30mA/100mA ( ½ , 1x, 5x current); 300mA/500mA ( ½, 1x current)
  • Compliance: IEC61557-6 and IEC61557-10

RCD Trip Current Test

  • Range: 0.5 I∆n to 1.1 I∆n
  • Accuracy: +/-5% of expected current
  • Step Size: 0.1*∆n
  • Step duration: 300ms
  • Compliance: IEC61557-6 and 61557-10

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