The instrument is a new instrument specially developed for resistivity determination using the active bridge principle as per the Industry Standard of People's Republic of China DL/T421-91 "Test Method for Volume Resistivity of Insulating Oils". It has characteristics of simple structure, excellent linearity, high sensitivity, stability, and safety. It is better than the instrument using voltage and current method.
The instrument is composed of parameters measurement system and oil cup heating control system. Its measurement range is 10 8 ~19.99×10 13 Ω·cm. It can time, read readings and save test data automatically.
Excepting to determine the volume resistivity of insulating oils, it can also used to determine resistivity of transformer oil and lubricating oils. It is the best choice to determine volume resistivity of lubricating oils in the power industry, petroleum industry, scientific research institutes, and relative factories and companies.
The instrument is composed of parameters measurement system and oil cup heating control system. Its measurement range is 10 8 ~19.99×10 13 Ω·cm. It can time, read readings and save test data automatically.
Excepting to determine the volume resistivity of insulating oils, it can also used to determine resistivity of transformer oil and lubricating oils. It is the best choice to determine volume resistivity of lubricating oils in the power industry, petroleum industry, scientific research institutes, and relative factories and companies.
II. Main technical specifications and parameters
(I) Operation condition
1. Ambient temperature: 0℃~40℃
2. Relative humidity: ≤85%
3. Power supply: AC 220V±10%, 50Hz±1Hz
(II) Measurement parameters
1. Measurement voltage: DC 500 V
2. Measurement range: 10 8 ~19.99×10 13 Ω·cm
3. Repeatability:
(1) >1012 Ω·cm: ≯25%
(2) <1012 Ω·cm: ≯15%
4. Heating power for temperature control: 300 W
5. Temperature controlling range: 30℃~100℃
6. Temperature controlling accuracy: ±0.5℃
7. Measurement error: ≤±10%
8. Measurement electrode cup: 3 pieces
(I) Operation condition
1. Ambient temperature: 0℃~40℃
2. Relative humidity: ≤85%
3. Power supply: AC 220V±10%, 50Hz±1Hz
(II) Measurement parameters
1. Measurement voltage: DC 500 V
2. Measurement range: 10 8 ~19.99×10 13 Ω·cm
3. Repeatability:
(1) >1012 Ω·cm: ≯25%
(2) <1012 Ω·cm: ≯15%
4. Heating power for temperature control: 300 W
5. Temperature controlling range: 30℃~100℃
6. Temperature controlling accuracy: ±0.5℃
7. Measurement error: ≤±10%
8. Measurement electrode cup: 3 pieces
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