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Megger OTS100AF Laboratory Oil Tester
  • Megger OTS100AF Laboratory Oil Tester
  • Megger OTS100AF Laboratory Oil Tester
  • Megger OTS100AF Laboratory Oil Tester

Megger OTS100AF Laboratory Oil Tester

Megger approved distributor and service centre.

Includes: Vessel 400 ml assembly, Magnetic bead stirrers (2 off), Magnetic bead retriever, Feeler gauge set 1, 2, 2.5, 2.54 mm, OTS100 AF User manual, PowerDB Lite software.

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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 Oil Test Set Product Video

Megger OTS100AF Specifications
Test voltage 0 to 100 kV rms maximum (50 kV - 0 - 50 kV).
Voltage rise time
0.5 kV/s, 2.0 kV/s or 3 kV/s depending on selected test standard.
Rise time accuracy Better than 5%.
Resolution and accuracy 0.1 kV ±1% ±2 digits.
Programmed test sequences ASTM D 1816-12 | BS EN 60156-96 | SABS EN60156 | ASTM D 1816-12E (ester oil)
ASTM D 877A-13 | CEI EN 60156-95 | VDE0370 part 5 | ASTM D 877B-13
IRAM 2341 | AS1767.2.1 | IEC 60156-95 | UNE EN 60156 | PA SEV EN60156
BS148/EN60156 | NF EN 60156 | JIS C 2101-99 (M) | IS 6792
GOST 6581-75 | JIS C 2101-99 (S) | IS 6792-2.
400 ml (standard)
150 ml (superuser pack / option).
Temperature measuring range 10 °C to 65 °C (ASTM D877 requires oils to be within 20 °C and 30 °C)
(IEC 60156 required oil to be within 15 °C and 25 °C).
Temperature sensor resolution 1 °C .
Power supply
Line voltage 85 to 265 VAC
Line frequency 50/60 Hz.
2 x USB type-A (Flash drive, printer)
1 x USB type-B (Factory use only, or Printer).
Internal printer
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.
Display 320 x 240 QVGA colour display with backlight.
Operating temperature range 0 °C to +50 °C.
Storage temperature range -30 °C to +65 °C.
Safety Designed in accordance with IEC61010.
Light industrial IEC 61326-1 Class B,
CISPR 22, CISPR 16-1 and CISPR 16-2.
English, French, German, Spanish,
Czech, Dutch, Finnish, Italian, Norwegian,
Polish, Portuguese, Russian and Swedish.
Dimensions: 580 mm x 420 mm x 290 mm.
Weight: 30 kg (with printer option fitted).
Megger OTS100AF warranty 1 year.


Megger PB & OTS Datasheet

PDF Specifications of the Megger OTS PB range and the OTS60AF, OTS80AF & OTS100AF Laboratory Oil Testers.

Download (786.81k)
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
20 rolls (4 rolls supplied if printer configured). 1008-030
Barcode reader Barcode reader, USB. 1001-047
Case 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
Electrodes Non-standard cylindrical with 0,5 mm edge radius (pair). 6220-538
Electrode gauge set 1, 2, 2.5, 2.54 mm. 1002-144
OTS Super-user kit 400 ml vessel kit
150 ml vessel kit
Additional IEC impeller
Additional ASTM impeller
Standard impeller
Vessel lid mounted impeller (ASTM D1816) for use with 400 ml vessel
‘Megger Guide to break down testing’ booklet
Oil testing application note
Carry case .

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