GE Hydran M2-X - History Files Verification; Dissolved Gas Analysis (DGA)

Hydran* M2-X Instruction Manual
Page 138
MA-029 Rev. 1.0, 30-Jul-18
Routine
Frequency
History files verification (see Section 9.4.1)
Annually or on
alarm
Dissolved gas analysis (DGA; see Section 9.4.2)
Hydran M2-X verification (see Section 9.5):
Annually or on
alarm due to
system fault
conditions
• Visual inspection (see Section 9.5.1)
• LED’s, heater, display and keypad verification (see Section
9.5.2)
• Parameter verification (alarm set points, etc.; see Section
9.5.3)
• Alarm relays verification (if connected; see Section 9.5.4)
• Analog output verification (if connected; see Section 9.5.5)
• Verification of sensor
a
(see Section 9.5.6)
Table 9-1: Maintenance Routines and their Frequency
a. The Hydran M2-X sensor is tested automatically twice a month, and the results are stored in the
Service history file.
9.4.1 History Files Verification
Frequency: Annually or on alarm
In addition to the annual or on-alarm verification, the user must also read and
save regularly the Hydran M2-X’s history files, using the Perception software.
If the data is read from the Hydran M2-X, follow the instructions in Section 3.4.2.
The data can be collected using the host or laptop computer running the Perception
software.
The history files are verified as follows:
1. Consult the Events history file to investigate suspicious alarms and other
events.
2. Consult the Short Term and Long Term history files to study the evolution of
the gas level, moisture level, hourly and daily trends, and averages.
3. Ensure the hourly and daily trends periods are optimized; change the values if
necessary.
4. Examine every alarm setting; change the values if necessary.
Note: Alarm setting should be modified by authorized personnel only.
9.4.2 Dissolved Gas Analysis (DGA)