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

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 13.2 on page 13-3).
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).
12.1.6

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 4.5.2.3 on
page 4-17
– DayTrAlr Delay; Gas;DailyTrend submenu; Section 4.5.2.3 on page 4-17
• Alarm cause(s): Daily trend above the DayTrAlr HH alarm set point
Proceed as described for the DayTrend H alarm (Section 12.1.5 on page 12-4).
12.1.7

DayTrend L

• Alarm type: Fail alarm
• Non-abbreviated description: Daily trend Low
• Priority: Medium
• Parameter(s) involved:
– DayTrend L; SysOK Relay;FaultTrig. submenu; Section 4.5.7 on page 4-23
– DayTrAlr L (alarm set point); Gas;DailyTrend submenu; Section 4.5.2.3 on
page 4-17
– DayTrAlr Delay; Gas;DailyTrend submenu; Section 4.5.2.3 on page 4-17
Part 17997
Alarm Messages on the Hydran 201Ti's Display
Rev. 6, March 2011 12-5