Preparation of electrode cup

• Cleaning and dryingClean the bottom with solvents such as petroleum ether and acetone, boil it with trisodium phosphate solution, and dry it. The insulation resistance of the empty cup should be greater than 10 ¹⁵ Ω1.

• Assembly inspectionEnsure electrode spacing of 2mm, reliable connection of shielding layer, and avoid leakage interference2.

Environment and Sample Processing

• Temperature and Humidity ControlThe relative humidity of the experimental environment is ≤ 70%, and the temperature remains constant at 90 ± 0.5 ℃13.

• Sample pretreatmentAfter shaking the sample evenly, avoid pouring bubbles into the electrode cup. After adding oil, let it stand for 15 minutes14.

Test operation specifications

• Voltage and charging timeDC voltage of 200-300V/mm, charging time of 60s, short circuit the electrode for 1 minute to eliminate residual charge before measurement4.

• Empty cup calibrationBefore testing, an empty cup test calibration is required to ensure the accuracy of the instrument2.

Safety and Instrument Maintenance

• High voltage protectionWear insulated gloves during operation to avoid electric shock; The box cover needs to be closed to prevent high-pressure leakage23.

• Grounding and CalibrationReliable grounding of instruments, regular calibration of capacitance and resistivity measurement modules4.

Data and Reports

• Repetitive requirementsThe difference between two measurement results should be ≤ 35%, and the higher value should be taken as the final result56.

• Report content: Should include electrode constant, test temperature, voltage parameters, and measurement frequency16.

Other precautions

• Equipment handlingThe oil cup needs to be packaged separately to avoid collision damage23.

• instrument maintenanceRegularly clean the electrodes, check the stability of the heating system, and ensure temperature control accuracy