Hydran* M2-X Instruction Manual
MA-029 Rev. 1.0, 30-Jul-18
message will be displayed on the M2-X display. The Events history file will be
updated with the appropriate message.
Note 1: All alarms are ignored for two minutes following a sensor test.
Note 2: In addition to the automatic sensor test that is initiated semi-monthly at
midnight, the sensor test can also be initiated manually via the local keypad. For each
automatic sensor test, certain parameters are recorded in the Service history file (see
Section 3.4.2.4) for further analysis by General Electric.
3.5.1.1 Sensor Test Results
The alarm messages that can be displayed following a sensor test are shown in
the Table below. For the troubleshooting procedure for each of these alarms, see
Section 8.1.
Sensor operating as expected.
Sensor Test results outside optimal
operating range. Sensor must be replaced.
Cable disconnected, misconnected or
defective.
Sensor Cable misconnected or short-
circuited.
Unable to perform the test. Install Sensor.
Table 3-5: Messages that can be Displayed Following a Sensor Test
Note: The Hydran M2-X is equipped with a provisional alarm called the “Sensor
Caution Alarm”. By default, this alarm is disabled, but can be enabled by the user to
give early notification of a potential impending issue with the sensor. If the “Sensor
Caution Alarm” is subsequently raised, it signifies that the “Replace Sensor Alarm” is
likely to occur soon. Users may wish to verify the DGA reading through comparison
with a manual sample.
3.5.2 Relay Test
The Relay Test parameters are used to set the operation mode of each of the five
relays. The four operation modes are explained in Section 6.5.3.
The same parameters can be accessed in Setup > Relay Setup > Relay Test. See
Section 3.2.3.1.
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