1. Open the dust cover.
2. Set the Vernier scale to zero (1).
3. On the other side of the ring with Vernier scale, there is an adjusting ring without scale
(2). Turn the adjusting ring clockwise until you hear an acoustic signal. The electrodes
are in contact with each other.
4. Slowly turn the adjusting ring anticlockwise until the acoustic signal stops.
The electrode gap is set to zero.
5. Set the Vernier scale to the desired electrode gap.
1 rotation (360°) = 1 mm
6. Remove the cover of the test vessel.
7. Use a setting gauge to check the set electrode gap.
8. Close the cover of the test vessel.
7.7 Fill and use the test vessel
Measurement errors caused by improper sampling and handling of the oil
sample
Improper sampling and handling of the oil sample can have a strong influence on the
measurement results which can lead to incorrect conclusions being drawn regarding
the quality of the insulating oil.
The sampling must only be performed by experienced, qualified personnel.
Follow the instructions for sampling below.