Megger OTS80AF Laboratory Oil Tester


Megger approved distributor and service centre.

The Megger OTS80AF/2 is a transportable, easy to operate, oil test set. A voltage selector fitted on the mains supply input panel at the rear permits the test sets to be operated from either 110, 120, 220 or 240V 50Hz/60Hz mains power supplies.

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£ 6,772.70 rrp £ 7,205.00

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(£ 8,127.24 inc VAT.)

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Please Note: The price shown is for the basic build only. The final price is determined by your choice of configuration. Example configuration: OTS80AF-UKU-P4 - This order is for a Megger OTS80AF with UK power lead, international electrode set, internal printer (fitted) and lid-mounted impeller. See PDF datasheet for details.

Megger’s OTS100AF/80AF/60AF Oil test sets are laboratory liquid dielectric breakdown testers. They are fully automatic, line powered and facilitate accurate breakdown voltage tests on mineral, ester and silicon insulating oils. The precision test vessel sets the accuracy standard for the liquid insulation test industry. For ease of use the instruments come pre-
programmed with a ‘library’ of international breakdown test standards and the ability to create custom tests.

The instrument is housed in a metal case with moulded end caps that accommodate handles. The test chamber is designed with an easy-clean surface and provides a drain for spilt oil through an internal pipe routed to the rear of the instrument. A beaker or similar can be used for spillage collection. The test area is covered by a transparent lid with an electrically conductive screen which, with the metal case, provides a safe equipotential enclosure for high voltage testing.

The lid allows in plenty of ambient light enabling users to confirm stirring and the witness breakdown. The chamber lid is dual redundant safety protected with micro-switches to prevent accidental electrification. A zero volt touch bar at the entrance to the chamber enhances safety to for the user.

The precision test vessel design yields highly accurate and repeatable results. Two stirring options are available; an internal magnetic bean stirrer which is dropped into the oil and an optional lid mounted impeller that conforms to ASTM D 1816 requirement. Stirring during breakdown testing is used to produce an homogeneous distribution of contaminants within the oil and to free any carbon generated between electrodes during testing.

All three laboratory models are fitted with a 12 key alphanumeric keypad to facilitate entry of test ID, filenames, notes etc. Alpha characters are entered by repetitive pressing on a key, the same way as text is entered on modern cellular telephones.


Fully automatic breakdown tester with test voltages up to 100 kV/ 80 kV / 60 kV depending on model.
Advanced 400 ml oil vessel with accurate electrode gap setting and adjustment locking mechanism.
Flat electrode gap gauges that will not damage electrodes.
Easy clean test chamber with oil drain.
Magnetic bead stirrer or optional lid mounted impeller (conforming to ASTM D 1816).
Direct trip control employing voltage and current measurement.
Rapid response to trip (<10 μs).
Automatic oil temperature measurement.
Intuitive user interface with backlit QVGA colour display (visible outdoors).
Simple transfer of test results via USB flash drive.
USB barcode reader scans oil sample barcode labels.
Optional VCM100D/VCM80D voltage check units measure voltage directly.


Megger OTS80AF Specs:    
Test voltage: 0 to 80 kV rms maximum (40 kV - 0 – 40 kV).
Voltage resolution and accuracy: 0.1 kV ±°1% ±°2 digits.
Vessels: 400 ml (standard). 150 ml (superuser pack / option).
Temperature measuring range: 10 °C to 65 °C.
Temperature sensor resolution: 1 °C.
Operating temperature: 0 °C to +50 °C.
Power supply: Line voltage 85 to 265 VAC. Line frequency 50/60 Hz.
Display: 320 x 240 QVGA colour display with backlight.
USB 2.0 compatible: 2 x USB type-A (Flash drive, printer, other). 1 x USB type-B (Factory use only, PC or Printer.
Internal printer: (Option) Matrix impact printer, Paper 57.5 mm wide.
External printer: Any printer with USB interface and PCL3 driver.
Protection: Dual safety micro switches on chamber cover.
Safety: Designed in accordance with IEC61010.
Dimensions: 580 mm x 420 mm x 290 mm.
Weight: 30 kg with printer option fitted.
Test vessel: 1.1 kg (400 ml and 150 ml).
Language: English, French, German, Spanish, Chinese, Czech, Dutch, Finnish, Italian, Norwegian, Polish, Portuguese, Russian and Swedish.
Includes: Vessel 400 ml assembly, Magnetic bead stirrers (2 off), Magnetic bead retriever, Feeler gauge set 1, 2, 2.5, 2.54 mm, OTS80 AF User manual, PowerDB Lite software.


Optional Accessories Order Code    
Vessel 400 ml assembly (no electrodes supplied). 1001-473
Vessel 150 ml assembly (no electrodes supplied). 1001-474
VCM100D digital voltage checker. 1001-105
VCM80D digital voltage checker. 1001-801
Printer paper, 1 roll (MOV applies). 25995-001
Barcode reader, USB. 1001-047
Transport case (with wheels). 1001-475
ASTM alternative propeller shaft assy. 1007-153
IEC alternative propeller shaft assy. 1007-154
Electrodes - Spherical (pair). 6220-484
Electrodes - Mushroom (pair). 6220-580
Electrodes - Cylindrical (pair). 6220-483
Electrode gauge set 1, 2, 2.5, 2.54 mm. 1002-144
OTS Super-user kit. 1007-467


Weight 30 kg with printer option fitted
OTS Test Voltages Up to 80kV

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Megger OTS80AF Laboratory Oil Tester