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Dilog DL9118 18th Edition Multifunction Tester

FREE Gift The all new Dilog DL9118 17th Edition Multifunction Tester. It's RCD-LOC XLT feature allowins loop testing without tripping any type of RCD/RCBO with very high accuracy.

Important Calibration Information

This instrument comes with a manufacturers calibration certificate.
Please see 'Calibration Options' in the description for more details.

Next Day Delivery (subject to availability)

£499.00 exc. VAT £598.80 inc. VAT £1,402.80 inc. VAT
  • Manufacturer Certificate Included
  • Phase Rotation Service
  • Earth Testing
  • Auto RCD
  • Backlit LCD Display
  • Non Trip Loop Testing
  • Memory Function
  • FreeDelivery
  • 30DayMoneyBack
Required Fields
  • Description
  • Features & Specification
  • Resources
  • Delivery (updated)

Free Gifts

This instrument comes complete with your choice of free gift from the drop-down menu above. Choose from a calibration voucher for next 
year or a 50m R2 wander lead. How about any one of the IET Guidance Notes, or a quality two-pole tester? 
Whatever you choose you can be sure you're getting a fantastic deal at Instrument Sales & Service.

DiLog DL9118 17th Edition Multifunction Tester

Test continuity, voltage, insulation, high and low current loop impedance, phase rotation, PFC loop tests, RCD trip time and current tests and loop impedance all in one unit.

The ALL NEW Di-Log DL9118 multifunction tester has been designed to fully comply with the testing requirements of the 17th Edition. It also incorporates many of the features that we have come to expect with modern MFTs. It is designed to be worn around the neck with a comfortable harness, for easy function selecting and testing.

The All NEW RCD-LOC XLT feature allows loop testing without tripping any type of RCD or RCBO with very high accuracy. The DL9118 is also packed full of features, such as a Remote Test Probe, Auto Start Loop & Continuity, colour changing LCD display indicating error, and comes complete with a toolbox style carry case.  All in all, the DL9118 offers incredible value for a feature packed MFT meeting all the safety and performance requirements of BS EN 61557.

*Important Calibration Information:

This instrument comes complete with the manufacturers dated calibration certificate. Please be aware that these certificates are generic and may also be time lapsed. If you would prefer a personalised full traceable calibration certificate applied to the equipment before dispatch, then please select this option from the drop-down menu above, an additional calibration charge will apply.


Di-Log DL9118 Comes Supplied With:

  • Rugged Carry Case
  • Manufacturers Certificate
  • Remote Probe
  • Set of Shielded Test leads with Crocodile Clips
  • Shielded AC Power Cord


Key Features:

  • Loop Impedance – Unique auto start RCD-LOC XLT loop test principle will not trip any RCD
  • Tests the new type A RCD's
  • Prospective short circuit current – with auto start and direct readout of PSCC
  • High Current Loop Test – auto start loop test with high current Ze measurement
  • Phase Rotation Test – will indicate the correct phase sequence
  • Continuity test – with auto start & null facility to zero out lead resistance
  • RCD testing – Trip time, trip current, auto test and ramp current
  • RCD auto test – test RCDs in auto mode and simply recall the test results once finished
  • Insulation measurement – with 250, 500 & 1000V test voltages
  • Integrated socket polarity test
  • Fully protected against damage when accidentally connected across phases

About Di-Log

Di-Log Test Equipment offers a comprehensive range of test equipment from a voltage indicator to 18th Edition and Thermal Imaging to portable  appliance testing kits. All Di-Log instruments are designed and manufactured to the highest quality specification and you can be assured that all manufacturing processes adhere to internationally recognised standards.  Di-Log instruments are accurate, safe and rugged – you won’t find a better balance between cost and fitness for purpose.


DiLog DL9118 17th Edition Multifunction Tester
Range 0 to 440V
Accuracy ±5% ±2 digits from 0 to 100Hz
Resolution 1V
Range 0.01 to 200Ω
Accuracy ±2% ±5 digits
Resolution 0.01 to 1.99Ω
2.0 to 19.9Ω
20 to 200Ω
Test Voltage >4V DC >25V DC Open circuit
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 250, 500 and 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 0.01 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 Measurements
Range 1A to 26Ka
Accuracy ±5% ±5 digits
Range 1A to 999A
1kA to 26kA
High Current Loop Impedance
Range 0.01 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 Measurements
Range 1A to 26kA
Accuracy ±5% ±5 digits
Range 1A to 999A
1kA to 26kA
RCD Trip Time Tests
Range 0ms to 2000ms
Accuracy ±5% ±2 digits
Range 0 to 2000ms 1/2 1x
0 to 300ms 1x general (500ms selective)
0 to 40ms 5x
Test Current 10mA/30mA/100mA (1/2, 1x, 5x current)
300mA/500mA (1/2, 1x current)
Compliance IEC61557-6 and IEC61557-10
RCD Trip Current Tests
Range 0.5I∆n to 1.1I∆n
Accuracy ±5% of expected current
Step Size 0.1I∆n
Step Duration 300ms
Compliance IEC61557-6 and 61557-10

Delivery Notices (Updated March 29th 2021)

During the current situation surrounding the effects of the Coronavirus pandemic, logistics from every company are under immense pressure to deliver goods on time.
Coupled with manufacturers on reduced output due to more stringent working practices and a global shortage of component parts to supply UK manufacturing, we have taken the decision to 
temporarily limit our services rather than let our customers down amid these unprecedented circumstances.
We hope you will understand our position on this and we apologize unreservedly for the inconvenience we know it will cause.

Please note that ALL orders placed before 3:00pm are shipped same-day (subject to stock and any additional services required).
The stated transport times above have some scope for adjustment built-in for the Covid-19 situation. Carriers themselves also have their own extended workload and limitations at this time which are unfortunately beyond our control.

Orders requiring calibration 

Whilst we take the greatest care to get all orders dispatched and delivered to you in the stated time frame, orders received PM and requiring
calibration may on occasion miss dispatch that day, according to the complexity of the calibration. Be assured they will ship on the next dispatch
this in most cases should not add more than 24 hours to your delivery.

Bank/Public Holidays

Predicted delivery times are based on regular trading days Monday to Friday. Public holidays, bank holidays and weekends are outside the usual scope
of our dispatch and subject to activities/holidays of our carriers and therefore may incur additional days lead time to your order.

*UK Mainland (Revised March 2021)

Service  Price 
Standard FREE 2-3 Day Courier Delivery – UK Mainland only - Zones A & B - Order value OVER £75.00 ex VAT - Order by 3:0pm FREE
Standard FREE 2-3 Day Courier Delivery – UK Mainland only - Zones A & B - Order value UNDER £75.00 ex VAT - Order by 3:0pm £4.75
Next WORKING Day (excludes Saturdays, Sundays and public holidays)  – UK Mainland only - Zones A & B  - ANY order value - Order by 3:0pm      £7.75
Saturday ANYTIME Delivery - Order by 3:0pm £9.95

New Postage Map Sept 2018>

Delivery Surcharges

Because of the high cost of carriage, we regretfully need to apply a surcharge on all deliveries made in the following regions:

  • Zones A & B  - Mainland delivery rates apply. 
  • Zone C - Scottish Highlands (Charges are calculated at the checkout).
  • Zone D - Outer Hebrides, Orkney Isles, Shetland Isles, Isle of Man, Scilly Isles, and Channel Islands (Charges are calculated at the checkout).
  • Zone E - Northern Ireland (Charges are calculated at the checkout).
  • Zone F - Republic of Ireland (Charges are calculated at the checkout).

Offshore Services

All offshore deliveries are a 3-4 day service as standard. This includes Channel Islands, Northern & Southern Ireland, Scottish Islands, Isle of Man and the Scilly Isles.

International delivery

International delivery charges are automatically added to your order at the checkout. For any questions regarding international deliveries please contact us at


All export inquiries should be directed to the export division before placement of order.

If no shipping option is available to your selected country please call us FREE on 0800 0224 060 to purchase your items.
All stated prices are subject to VAT at the current rate where applicable.