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Tangent-3M Tan Delta Tester

Tan Delta Tester

TANGENT-3M is designed for measuring the dielectric dissipation factor (tan δ / tangent delta) of insulating oils at industrial frequency (f = 50 Hz) according to IEC 60247:2004.

In addition to the dielectric dissipation factor, TANGENT-3M determines the temperature, absolute permittivity, and electrical capacitance of the oil sample.

Tangent-3M tan delta tester offers fully automated measurement for dielectric dissipation factor including empty cell calibration & oil sample heating, carried out according to IEC 60247 specifications.

TANGENT-3M comes with three test cells as standard, however its non-volatile memory is capable of storing parameters for up to six different cells.The Tangent Delta tester has data storage facility & can store upto 2000 test results which can be further exported into MS Word or Excel formats.

In addition to the dielectric dissipation factor measurement/ Tan Delta Testing, TANGENT-3M Tan delta tester measures the temperature, dielectric constant and electrical capacitance of an oil sample.

High accuracy & rate of measurement:

The Tan Delta Tester provides highly  accurate measurements with accuracy ± (0.01*tan δ + 0.0002) for dielectric dissipation measurement, ± (tan δ + 0.5) % for determining electrical capacitance & ± 1 °С for measuring temperature.

Under program "START 1", Measurement duration including test cell calibration and oil sample heating to 90 °С (with taking measurements at 70 and 90 °С), does not exceed 35 minutes.

According to "START 2" program which in addition to test cell calibration and oil sample heating to 95 °С (with taking measurements at 70/80/90 °С) also includes the sample cooling (with taking measurements at 90/80/70 °С), does not exceed 85 minutes.

Durable Design : The Lightweight Tan Delta Tester is made in the form of a single compact unit enclosed in a heat-resistant plastic casing.

Safety: High-voltage circuit of TANGENT-3 is protected against breakdowns, while the high voltage supply is immediately cut off whenever the test chamber lid gets opened.

Product Specification

Dissipation factor (tangent delta) measurement parameters

Measurement range

0.0001 … 1.0

Absolute measurement error

± (0.01*tan δ + 0.0002), where tan δ – measured value of the dissipation factor

Measurement resolution


Measurement time, including cell calibration and oil sample heating to 90 °C (with measurement at 70 / 80 / 90 °C)

up to 35 min

Measurement time, including cell calibration and oil sample heating to 90 °C (with measurement at 70 / 80 / 90 °C) and cooling (with measurement at 90 / 80 / 70 °C)

up to 85 min

Electrical сapacitance determining parameters

Determining range

5 … 50 pF

Determining error

± (tan δ + 0.5) %

System parameters

AC voltage applied to the test cell

2000 VRMS

Relative voltage measurement error

± 2.5 %

Heating temperature of the oil sample in the cell

up to 90 °С

Absolute temperature determining error

± 1 °С

Test cell volume

12 cm3 ± 1 cm3

Power supply and consumption

Mains supply voltage

230 VAC, ± 10 %

Mains supply frequency

50 / 60 Hz

Power consumption

up to 0.3 kV•А


Dimensions, H × W × D

90 × 405 × 260 mm


5 kg

  • Automated Measurement
  • Replaceable Test Cycle
  • High accuracy & rate of measurement
  • Durable Design
  • Apparatus safety from high voltage breakdown
Frequently Asked Questions (5 answered questions)
upto 2000 test results

Person name: Asian

Yes, data can be exported in MS word & MS Excel format.

Person name: Asian

The equipment has compact design & lightweight, weigh only 5kg.

Person name: Asian

0.0001 to 1.0

Person name: Asian

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October 28 2021 18:57:14
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