Oil Test Sets

Fully automatic insulating oil dielectric breakdown testing

  • Latest IEC standards
  • IEC60156-2018 & IEC60156-2018 V for Viscous Oils
  • IEC60156-2018 Annex A & IEC60156-2018 Annex A (V) for Viscous Oils
  • Latest Chinese standards – GBT/507-2002
  • NEW – Chinese language on screen
  • NEW – Withstand tests
  • OTS configurator removed – range consolidated
  • AF 12 variants
  • PB 8 variants
  • Lightweight from 16.8 kg – OTS PB range 60kV & 80kV
  • Portable (OTS PB) & Laboratory instruments (OTS AF) range from 60kV up to 100kV

OTS PB models

These 60 kV and 80 kV oil test sets are small and the lightest on the market with weight ranging from 16.8 kg to 20.8 kg depending on model configuration. The transport case and carry bag are optional accessories. The carry bag has pouches for electrode accessory pack, leads, quick user guide, paper roll etc. these units supplied mains powered and battery operated for additional flexibility in portable applications. All PBs are fitted with NiMH batteries and are also supplied with an internal12 V DC charger and vehicle adaptor cable as standard.

OTS AF models

These 60 kV, 80 kV and 100 kV models have a much larger test chamber for even easier access and cleaning, particularly useful in a lab environment. They are fitted with a 12 key alpha-numeric keypad to facilitate entry of test ID, file names, notes etc. Alpha characters are entered by repetitive pressing on a key. The AF models also have the ability to use a USB barcode reader to scan oil sample barcode labels, ideal for better integration within a laboratory.

Technical Documents
Technical guide
OTS vessel preparation
Technical guide
Guide to insulating oil dielectric breakdown testing – OTS series
OTS Test Standards


The attached file will update all the test standards of your OTS to the latest versions. Do not change the file name or it will not work. Please follow the instructions below:-


1. Extract the attached file (stdSeqs.db) to a USB memory stick


2. Insert the memory stick into the Type A USB port on the front panel of the OTS (or the Type A USB port on the rear of the OTS)


3. On the OTS, navigate to the Tools menu with the Hammer & Wrench symbol


4. Scroll down and select Manage test standards


5. On the next screen select Update Standards (USB) and the instrument will upload the new file from the USB stick.


6. The instrument will now have the latest standards installed ready to use.


For Older OTS (Firmware version 1.15) use ""


For updated OTS (Firmware version use ""


IMPORTANT NOTE: is not compatible with OTS Firmware version 1.15 is not compatible with OTS Firmware version
10.1 KB | 23/03/22
17.9 KB | 23/03/22