Procedure
1. Close valve V1 and valve V2
2. Close valve V3
3. Observe Reduction in Oil Level in Relay
4. If Oil level Reduction > 100 c.cm, then Alarm light blink
5. If Oil level Reduction > 300 c.cm, then Trip Circuit light blink (Alarm stays ON)
0 100 200 300 400 500 c.cm
Oil Level Drained: 0 c.cm