GE Hydran 201i - Inaccurate Gas Readings; Gas Level Reading Is Abnormally High; Gas Level Is Slowly Decreasing Towards Zero

MA-033 Rev. 14.0, 12-Nov-18
Hydran* 201i Instruction Manual
Page 192
3. Verify the Hydran 201 sensor’s serial number and parameters in the H201Ti’s
Service; SensorCal Data submenu (Section 5.5.4.1).
4. Execute the H201Ti’s ForceSensor Test command (Relays/Analog submenu) to
test sensor operation.
5. Verify the value of the HourlyTr Period parameter (period of the hourly trend; Gas;
HourlyTrend submenu).
6. Verify the value of the DailyTr Period parameter (period of the daily trend;
Gas;DailyTrend submenu).
7. Verify the value of the Period B parameter (Temperature; DynOil Sampl
submenu).
8. Verify the parameters pertaining to the sensor temperature (Temperature
submenu).
9. Consult General Electric to optimize the value of the parameters and the location
of the H201 sensor.
13.5.6 Inaccurate Gas Readings
1. Verify the transformer’s level of fault gases-in-oil by performing a dissolved gas
analysis (DGA; see Section 14.6).
2. Ensure the valve (on which the Hydran 201Ti is installed) is fully open.
3. Confirm that the valve type is acceptable (full bore, gate or ball, no restriction
between valve and tank). See the recommendations in Section 6.1.
4. Verify the Hydran 201 sensor’s serial number and parameters in the H201Ti’s
Service; SensorCal Data submenu (Section 5.5.4.1).
5. Execute the H201Ti’s ForceSensor Test command (Relays/Analog submenu) to
test the sensor operation.
6. Verify the parameters pertaining to the sensor temperature (Temperature
submenu).
7. Consult General Electric to optimize the value of the parameters and the location
of the H201 sensor.
13.5.7 Gas Level Reading is Abnormally High
See Section 13.1.9.
13.5.8 Gas Level is Slowly Decreasing towards Zero
See Section 13.1.15.