Hydran* M2-X Instruction Manual
MA-029 Rev. 1.0, 30-Jul-18
Figure 4-7: The Bleed Screw Must Be on Top, at the 12 O’clock Position
4.3.6 Opening the Valve and Purging Air from the Sensor
Perform this step according to company regulations. Proceed
carefully to avoid introducing air into the transformer. Use a
bucket to collect the oil.
Proceed as follows (see Figure 4-8):
1. Using the 5/32-in Allen key, fully close the sensor’s bleed screw and then open
it 1/8 of a turn.
2. Slowly open partially the transformer valve until oil leaks out of the sensor’s
sampling port.
3. Wait until there are no more air bubbles present in the oil and shut the bleed
screw tightly.
4. Open the valve completely.
5. Wipe all traces of oil from the sensor.
6. Inspect the sensor for oil leaks.
7. Tighten the bleed screw.
8. Dispose of the collected oil according to the company regulations.
Bleed screw must be on top,
at
the “12 o’clock” position when
sensor is installed horizontally.
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