GE Hydran 201i, Instruction Manual

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Chapter 12 • Troubleshooting
12-18 Rev. 6, March 2011 Part 17997
4. Verify the relay’s contacts and the circuit by setting the corresponding RelayMode
parameter to Force ON and Force OFF in the H201T i ’s Relays/Analog submenu.
12.5.5 Irregular Gas Readings
1. Ensure the valve (on which the Hydran 201T i is installed) is fully open.
2. Confirm that the valve type is acceptable (full bore, gate or ball, no restriction
between valve and tank). See the recommendations in Section 5.1 on page 5-1.
3. Verify the Hydran 201 sensor’s serial number and parameters in the H201T i ’s
Service;SensorCal Data submenu (Section 4.5.4.1 on page 4-18).
4. Execute the H201T i ’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 Canada to optimize the value of the parameters and the
location of the H201 sensor.
12.5.6 Inaccurate Gas Readings
1. Verify the transformer’s level of fault gases-in-oil by performing a dissolved gas
analysis (DGA; see Section 13.2 on page 13-3).
2. Ensure the valve (on which the Hydran 201T i 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 5.1 on page 5-1.