Perform this step according to company regulations. Proceed
carefully to avoid introducing air into the transformer. Use a
bucket to collect oil.
2. Close the valve to which the Hydran M2-X is mounted.
3. Remove the sensor clamp using the spanner wrench. Refer to Figure 4-3.
4. Carefully separate the sensor from the enclosure. Put aside the electronic
enclosure.
5. Disconnect the sensor cable from the sensor. Rotate the connector
anticlockwise (approximately 1/8 of a turn), then carefully pull it from the
sensor. Refer to Figure 4-4.
6. Using the 5/32-in Allen key, carefully open the bleed screw on the sensor
about 1/8 of a turn.
7. Unscrew the sensor from the valve using an adjustable wrench. It is
recommended not to use a wrench with jagged jaws as these may damage
the sensor.
8. Use disposable paper to absorb the oil from the sensor. Allow the sensor to
drip overnight on disposable absorbent paper.
9. Dispose of the collected oil and paper according to the local power utility
regulations.
10. Store the sensor and electronic enclosure.
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