The TOR-7 transformer oil tester measures moisture, hydrogen, gas content, and solid particle contamination in a single device. Water activity (aw) is measured from 0 to 1 with high accuracy, and temperature is recorded. Hydrogen and contamination are measured from 25""5,000"�ppm with good precision and low cross-sensitivity to other gases. Oil purity is assessed according to ISO 4406 and SAE standards, covering a viscosity range of 1""1,000"�mm�²/s and ISO contamination classes from 9/8/7 to 25/24/23.

The TOR-7 transformer oil tester is designed to determine the volumetric gas content, moisture, contamination by solid particles, and hydrogen content in oil. The device can analyze mineral transformer oils with specific characteristics:

kinematic viscosity at 50 °C "" 2"�12 mm2/s;
density at 20°C "" 800"�950 kg/m3;
mass moisture content in oil "" not more than 10 ppm;
industrial purity class according to ISO 4406 "" not worse 21/19/16.

Operating Principle

Measurements are based on tracking the pressure change of gas within a vacuumed cylinder during the pouring of an oil portion. Considering the volumes of the cylinder and the poured oil, as well as the pressure inside the cylinder before and after pouring, one can determine the volumetric gas content. With the help of sensors and a control board, the moisture content, oil temperature, hydrogen content, and the number of solid particles in the oil are calculated and displayed on the screen.

Features

TOR-7 Universal Transformer Oil Tester (Moisture, Gas, Solids)

TOR-7 Transformer Oil Tester measures moisture, hydrogen, gas content and solids contamination in one device. Water activity (aw) is measured from 0 to 1 with high accuracy and temperature is recorded. Hydrogen and contamination are measured from 25 to 5,000 ppm with good accuracy and low cross-sensitivity to other gases. Oil purity is assessed according to ISO 4406 and SAE standards, covering a viscosity range from 1 to 1,000 mm�²/s and ISO contamination classes from 9/8/7 to 25/24/23.

TOR-7 Transformer Oil Tester is designed to determine volumetric gas content, moisture, solids contamination and hydrogen content in oil. The device can analyze mineral transformer oils with specific characteristics:

Application:

FR3 dielectric fluid

Midel 7131 dielectric fluid

Silicone oil

Transformer oil

General technical specifications

No. Item Value

1 Volume of the measuring cell, l 1.2

2 Volume of the oil sample, l 0.5 "" 0.7

3 Maximum pressure in the device, Pa 0.3

4 Maximum leakage in the device, Pa 26

5 Inlet oil pressure, bar 0.3 "" 3

6 Temperature of the measured oil, ºC 20 "" 90

7 Maximum power consumption, kW, not more than 1

8 Parameters of the electric current: "" voltage, V "" variable with frequency, Hz or at the request of the customer

9 Overall dimensions, mm, not more than "" length "" height "" width

465

530

375

10 Weight, kg, not more than 40

Oil measurement characteristics

No. Item Value

Humidity measurement characteristics

1 Operating range, aw (water activity (aw)) 0"�1

2 Accuracy at 20 °C �±0.02 aw (0"�0.9 aw) �±0.03 aw (0.9"�1 aw)

3 Temperature measurement yes

4 Operating temperature, °C 0"�55

Hydrogen measurement characteristics

6 Measuring range, ppm 25-5000

7 Accuracy 20% of reading or 25 ppm

8 Repeatability 10% of reading or 15 ppm

9 Response time <60 min (90% step change)

10 Cross-sensitivity Less than 2% cross-sensitivity to other gases (CO, CO2, Hydrocarbons)

11 Operating temperature, °C 0"�55

Contamination measurement characteristics

6 Measuring range, ppm 25-5000

7 Accuracy 20% of measurement or 25 ppm

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