Daytrend H; Daytrend Hh - GE Hydran 201i Instruction Manual

Hydran* 201i Instruction Manual

13.1.5 DayTrend H

• Alarm type: Gas alarm
• Non-abbreviated description: Daily trend High
• Priority: Medium
• Parameter(s) involved:
- DayTrAlr H (alarm set point); Gas; DailyTrend submenu; Section 5.5.2.3.
- DayTrAlr Delay; Gas; DailyTrend submenu; Section 5.5.2.3.
• Alarm cause(s): Daily trend above the DayTrAlr H alarm set point
Proceed as follows:
1. Verify the daily trend calculated by the Hydran 201Ti. This value is displayed in
the Main Display mode (see Section 5.5.2) and also in the DailyTrend screen in the
Gas;DailyTrend submenu (see Section 5.5.2.3). If this value seems normal, verify
whether the value of the alarm set point is adequate. This parameter was
probably set to a value that is too low.
2. Verify the gas level measured by the H201Ti. This value is displayed in the Main
Display mode (see Section 5.5.2) and also in the GasLevel screen in the
Gas;GasLevel submenu (see Section 5.5.2.1). If this value seems normal, verify
whether the value of the alarm set point is adequate. This parameter was
probably set to a value that is too low.
3. If the gas level value is abnormally too high and the alarm set point is set to an
adequate value, verify the reading accuracy of the Hydran 201i System. Perform a
dissolved gas analysis (DGA; see Section 14.6).
4. If the gas level measured by the DGA corresponds to the H201Ti's reading, verify
the equipment monitored by the H201Ti; follow the company regulations.
5. If the gas level readings are different (taking into account the accuracy of the
apparatus and the method), execute the ForceSensor Test command in the
Service submenu to test the operation of the Hydran 201 sensor. A problem may
have occurred since the last automatic sensor test (which is performed the first
and fifteenth days of each month at midnight).

13.1.6 DayTrend HH

• Alarm type: Gas alarm
• Non-abbreviated description: Daily trend High-High
• Priority: High
• Parameter(s) involved:
- DayTrAlr HH (alarm set point); Gas;DailyTrend submenu; Section 5.5.2.3.
- DayTrAlr Delay; Gas;DailyTrend submenu; Section 5.5.2.3.
• Alarm cause(s): Daily trend above the DayTrAlr HH alarm set point
Proceed as described for the DayTrend H alarm (Section 13.1.5).
MA-033 Rev. 14.0, 12-Nov-18
Page 181